lib/python/Components/Harddisk.py

   1 from os import system, listdir, statvfs, popen, makedirs, stat, major, minor, path, access
   2 from Tools.Directories import SCOPE_HDD, resolveFilename
   3 from Tools.CList import CList
   4 from SystemInfo import SystemInfo
   5 import time
   6 from Components.Console import Console
   7
   8 def MajorMinor(path):
   9         rdev = stat(path).st_rdev
  10         return (major(rdev),minor(rdev))
  11
  12 def readFile(filename):
  13         file = open(filename)
  14         data = file.read().strip()
  15         file.close()
  16         return data
  17
  18 DEVTYPE_UDEV = 0
  19 DEVTYPE_DEVFS = 1
  20
  21 class Harddisk:
  22         def __init__(self, device):
  23                 self.device = device
  24
  25                 if access("/dev/.udev", 0):
  26                         self.type = DEVTYPE_UDEV
  27                 elif access("/dev/.devfsd", 0):
  28                         self.type = DEVTYPE_DEVFS
  29                 else:
  30                         print "Unable to determine structure of /dev"
  31
  32                 self.max_idle_time = 0
  33                 self.idle_running = False
  34                 self.timer = None
  35
  36                 self.dev_path = ''
  37                 self.disk_path = ''
  38                 self.phys_path = path.realpath(self.sysfsPath('device'))
  39
  40                 if self.type == DEVTYPE_UDEV:
  41                         self.dev_path = '/dev/' + self.device
  42                         self.disk_path = self.dev_path
  43
  44                 elif self.type == DEVTYPE_DEVFS:
  45                         tmp = readFile(self.sysfsPath('dev')).split(':')
  46                         s_major = int(tmp[0])
  47                         s_minor = int(tmp[1])
  48                         for disc in listdir("/dev/discs"):
  49                                 dev_path = path.realpath('/dev/discs/' + disc)
  50                                 disk_path = dev_path + '/disc'
  51                                 try:
  52                                         rdev = stat(disk_path).st_rdev
  53                                 except OSError:
  54                                         continue
  55                                 if s_major == major(rdev) and s_minor == minor(rdev):
  56                                         self.dev_path = dev_path
  57                                         self.disk_path = disk_path
  58                                         break
  59
  60                 print "new Harddisk", self.device, '->', self.dev_path, '->', self.disk_path
  61                 self.startIdle()
  62
  63         def __lt__(self, ob):
  64                 return self.device < ob.device
  65
  66         def partitionPath(self, n):
  67                 if self.type == DEVTYPE_UDEV:
  68                         return self.dev_path + n
  69                 elif self.type == DEVTYPE_DEVFS:
  70                         return self.dev_path + '/part' + n
  71
  72         def sysfsPath(self, filename):
  73                 return path.realpath('/sys/block/' + self.device + '/' + filename)
  74
  75         def stop(self):
  76                 if self.timer:
  77                         self.timer.stop()
  78                         self.timer.callback.remove(self.runIdle)
  79
  80         def bus(self):
  81                 # CF (7025 specific)
  82                 if self.type == DEVTYPE_UDEV:
  83                         ide_cf = False  # FIXME
  84                 elif self.type == DEVTYPE_DEVFS:
  85                         ide_cf = self.device[:2] == "hd" and "host0" not in self.dev_path
  86
  87                 internal = "pci" in self.phys_path
  88
  89                 if ide_cf:
  90                         ret = "External (CF)"
  91                 elif internal:
  92                         ret = "Internal"
  93                 else:
  94                         ret = "External"
  95                 return ret
  96
  97         def diskSize(self):
  98                 line = readFile(self.sysfsPath('size'))
  99                 try:
 100                         cap = int(line)
 101                 except:
 102                         return 0;
 103                 return cap / 1000 * 512 / 1000
 104
 105         def capacity(self):
 106                 cap = self.diskSize()
 107                 if cap == 0:
 108                         return ""
 109                 return "%d.%03d GB" % (cap/1000, cap%1000)
 110
 111         def model(self):
 112                 if self.device[:2] == "hd":
 113                         return readFile('/proc/ide/' + self.device + '/model')
 114                 elif self.device[:2] == "sd":
 115                         vendor = readFile(self.sysfsPath('device/vendor'))
 116                         model = readFile(self.sysfsPath('device/model'))
 117                         return vendor + '(' + model + ')'
 118                 else:
 119                         assert False, "no hdX or sdX"
 120
 121         def free(self):
 122                 try:
 123                         mounts = open("/proc/mounts")
 124                 except IOError:
 125                         return -1
 126
 127                 lines = mounts.readlines()
 128                 mounts.close()
 129
 130                 for line in lines:
 131                         parts = line.strip().split(" ")
 132                         real_path = path.realpath(parts[0])
 133                         if not real_path[-1].isdigit():
 134                                 continue
 135                         try:
 136                                 if MajorMinor(real_path) == MajorMinor(self.partitionPath(real_path[-1])):
 137                                         stat = statvfs(parts[1])
 138                                         return stat.f_bfree/1000 * stat.f_bsize/1000
 139                         except OSError:
 140                                 pass
 141                 return -1
 142
 143         def numPartitions(self):
 144                 numPart = -1
 145                 if self.type == DEVTYPE_UDEV:
 146                         try:
 147                                 devdir = listdir('/dev')
 148                         except OSError:
 149                                 return -1
 150                         for filename in devdir:
 151                                 if filename.startswith(self.device):
 152                                         numPart += 1
 153
 154                 elif self.type == DEVTYPE_DEVFS:
 155                         try:
 156                                 idedir = listdir(self.dev_path)
 157                         except OSError:
 158                                 return -1
 159                         for filename in idedir:
 160                                 if filename.startswith("disc"):
 161                                         numPart += 1
 162                                 if filename.startswith("part"):
 163                                         numPart += 1
 164                 return numPart
 165
 166         def unmount(self):
 167                 try:
 168                         mounts = open("/proc/mounts")
 169                 except IOError:
 170                         return -1
 171
 172                 lines = mounts.readlines()
 173                 mounts.close()
 174
 175                 cmd = "umount"
 176
 177                 for line in lines:
 178                         parts = line.strip().split(" ")
 179                         real_path = path.realpath(parts[0])
 180                         if not real_path[-1].isdigit():
 181                                 continue
 182                         try:
 183                                 if MajorMinor(real_path) == MajorMinor(self.partitionPath(real_path[-1])):
 184                                         cmd = ' ' . join([cmd, parts[1]])
 185                                         break
 186                         except OSError:
 187                                 pass
 188
 189                 res = system(cmd)
 190                 return (res >> 8)
 191
 192         def createPartition(self):
 193                 cmd = 'printf "8,\n;0,0\n;0,0\n;0,0\ny\n" | sfdisk -f -uS ' + self.disk_path
 194                 res = system(cmd)
 195                 return (res >> 8)
 196
 197         def mkfs(self):
 198                 cmd = "mkfs.ext3 "
 199                 if self.diskSize() > 4 * 1024:
 200                         cmd += "-T largefile "
 201                 cmd += "-m0 -O dir_index " + self.partitionPath("1")
 202                 res = system(cmd)
 203                 return (res >> 8)
 204
 205         def mount(self):
 206                 try:
 207                         fstab = open("/etc/fstab")
 208                 except IOError:
 209                         return -1
 210
 211                 lines = fstab.readlines()
 212                 fstab.close()
 213
 214                 res = -1
 215                 for line in lines:
 216                         parts = line.strip().split(" ")
 217                         real_path = path.realpath(parts[0])
 218                         if not real_path[-1].isdigit():
 219                                 continue
 220                         try:
 221                                 if MajorMinor(real_path) == MajorMinor(self.partitionPath(real_path[-1])):
 222                                         cmd = "mount -t ext3 " + parts[0]
 223                                         res = system(cmd)
 224                                         break
 225                         except OSError:
 226                                 pass
 227
 228                 return (res >> 8)
 229
 230         def createMovieFolder(self):
 231                 try:
 232                         makedirs(resolveFilename(SCOPE_HDD))
 233                 except OSError:
 234                         return -1
 235                 return 0
 236
 237         def fsck(self):
 238                 # We autocorrect any failures
 239                 # TODO: we could check if the fs is actually ext3
 240                 cmd = "fsck.ext3 -f -p " + self.partitionPath("1")
 241                 res = system(cmd)
 242                 return (res >> 8)
 243
 244         def killPartition(self, n):
 245                 part = self.partitionPath(n)
 246
 247                 if access(part, 0):
 248                         cmd = 'dd bs=512 count=3 if=/dev/zero of=' + part
 249                         res = system(cmd)
 250                 else:
 251                         res = 0
 252
 253                 return (res >> 8)
 254
 255         errorList = [ _("Everything is fine"), _("Creating partition failed"), _("Mkfs failed"), _("Mount failed"), _("Create movie folder failed"), _("Fsck failed"), _("Please Reboot"), _("Filesystem contains uncorrectable errors"), _("Unmount failed")]
 256
 257         def initialize(self):
 258                 self.unmount()
 259
 260                 # Udev tries to mount the partition immediately if there is an
 261                 # old filesystem on it when fdisk reloads the partition table.
 262                 # To prevent that, we overwrite the first 3 sectors of the
 263                 # partition, if the partition existed before. That's enough for
 264                 # ext3 at least.
 265                 self.killPartition("1")
 266
 267                 if self.createPartition() != 0:
 268                         return -1
 269
 270                 if self.mkfs() != 0:
 271                         return -2
 272
 273                 if self.mount() != 0:
 274                         return -3
 275
 276                 if self.createMovieFolder() != 0:
 277                         return -4
 278
 279                 return 0
 280
 281         def check(self):
 282                 self.unmount()
 283
 284                 res = self.fsck()
 285                 if res & 2 == 2:
 286                         return -6
 287
 288                 if res & 4 == 4:
 289                         return -7
 290
 291                 if res != 0 and res != 1:
 292                         # A sum containing 1 will also include a failure
 293                         return -5
 294
 295                 if self.mount() != 0:
 296                         return -3
 297
 298                 return 0
 299
 300         def getDeviceDir(self):
 301                 return self.dev_path
 302
 303         def getDeviceName(self):
 304                 return self.disk_path
 305
 306         # the HDD idle poll daemon.
 307         # as some harddrives have a buggy standby timer, we are doing this by hand here.
 308         # first, we disable the hardware timer. then, we check every now and then if
 309         # any access has been made to the disc. If there has been no access over a specifed time,
 310         # we set the hdd into standby.
 311         def readStats(self):
 312                 try:
 313                         l = open("/sys/block/%s/stat" % self.device).read()
 314                 except IOError:
 315                         return -1,-1
 316                 (nr_read, _, _, _, nr_write) = l.split()[:5]
 317                 return int(nr_read), int(nr_write)
 318
 319         def startIdle(self):
 320                 self.last_access = time.time()
 321                 self.last_stat = 0
 322                 self.is_sleeping = False
 323                 from enigma import eTimer
 324
 325                 # disable HDD standby timer
 326                 Console().ePopen(("hdparm", "hdparm", "-S0", self.disk_path))
 327                 self.timer = eTimer()
 328                 self.timer.callback.append(self.runIdle)
 329                 self.idle_running = True
 330                 self.setIdleTime(self.max_idle_time) # kick the idle polling loop
 331
 332         def runIdle(self):
 333                 if not self.max_idle_time:
 334                         return
 335                 t = time.time()
 336
 337                 idle_time = t - self.last_access
 338
 339                 stats = self.readStats()
 340                 print "nr_read", stats[0], "nr_write", stats[1]
 341                 l = sum(stats)
 342                 print "sum", l, "prev_sum", self.last_stat
 343
 344                 if l != self.last_stat and l >= 0: # access
 345                         print "hdd was accessed since previous check!"
 346                         self.last_stat = l
 347                         self.last_access = t
 348                         idle_time = 0
 349                         self.is_sleeping = False
 350                 else:
 351                         print "hdd IDLE!"
 352
 353                 print "[IDLE]", idle_time, self.max_idle_time, self.is_sleeping
 354                 if idle_time >= self.max_idle_time and not self.is_sleeping:
 355                         self.setSleep()
 356                         self.is_sleeping = True
 357
 358         def setSleep(self):
 359                 Console().ePopen(("hdparm", "hdparm", "-y", self.disk_path))
 360
 361         def setIdleTime(self, idle):
 362                 self.max_idle_time = idle
 363                 if self.idle_running:
 364                         if not idle:
 365                                 self.timer.stop()
 366                         else:
 367                                 self.timer.start(idle * 100, False)  # poll 10 times per period.
 368
 369         def isSleeping(self):
 370                 return self.is_sleeping
 371
 372 class Partition:
 373         def __init__(self, mountpoint, device = None, description = "", force_mounted = False):
 374                 self.mountpoint = mountpoint
 375                 self.description = description
 376                 self.force_mounted = force_mounted
 377                 self.is_hotplug = force_mounted # so far; this might change.
 378                 self.device = device
 379
 380         def stat(self):
 381                 return statvfs(self.mountpoint)
 382
 383         def free(self):
 384                 try:
 385                         s = self.stat()
 386                         return s.f_bavail * s.f_bsize
 387                 except OSError:
 388                         return None
 389
 390         def total(self):
 391                 try:
 392                         s = self.stat()
 393                         return s.f_blocks * s.f_bsize
 394                 except OSError:
 395                         return None
 396
 397         def mounted(self):
 398                 # THANK YOU PYTHON FOR STRIPPING AWAY f_fsid.
 399                 # TODO: can os.path.ismount be used?
 400                 if self.force_mounted:
 401                         return True
 402
 403                 try:
 404                         mounts = open("/proc/mounts")
 405                 except IOError:
 406                         return False
 407
 408                 lines = mounts.readlines()
 409                 mounts.close()
 410
 411                 for line in lines:
 412                         if line.split(' ')[1] == self.mountpoint:
 413                                 return True
 414                 return False
 415
 416 DEVICEDB_SR = \
 417         {"dm8000":
 418                 {
 419                         "/devices/pci0000:01/0000:01:00.0/host0/target0:0:0/0:0:0:0": _("DVD Drive"),
 420                         "/devices/pci0000:01/0000:01:00.0/host1/target1:0:0/1:0:0:0": _("DVD Drive"),
 421                         "/devices/platform/brcm-ehci-1.1/usb2/2-1/2-1:1.0/host3/target3:0:0/3:0:0:0": _("DVD Drive"),
 422                 },
 423         "dm800":
 424         {
 425         },
 426         "dm7025":
 427         {
 428         }
 429         }
 430
 431 DEVICEDB = \
 432         {"dm8000":
 433                 {
 434                         "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0": _("Front USB Slot"),
 435                         "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.2/1-1.2:1.0": _("Back, upper USB Slot"),
 436                         "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.3/1-1.3:1.0": _("Back, lower USB Slot"),
 437                         "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0": _("Front USB Slot"),
 438                         "/devices/platform/brcm-ehci-1.1/usb2/2-1/2-1:1.0/": _("Internal USB Slot"),
 439                         "/devices/platform/brcm-ohci-1.1/usb4/4-1/4-1:1.0/": _("Internal USB Slot"),
 440                 },
 441         "dm800":
 442         {
 443                 "/devices/platform/brcm-ehci.0/usb1/1-2/1-2:1.0": "Upper USB Slot",
 444                 "/devices/platform/brcm-ehci.0/usb1/1-1/1-1:1.0": "Lower USB Slot",
 445         },
 446         "dm7025":
 447         {
 448                 "/devices/pci0000:00/0000:00:14.1/ide1/1.0": "CF Card Slot", #hdc
 449                 "/devices/pci0000:00/0000:00:14.1/ide0/0.0": "Internal Harddisk"
 450         }
 451         }
 452
 453 class HarddiskManager:
 454         def __init__(self):
 455                 self.hdd = [ ]
 456                 self.cd = ""
 457                 self.partitions = [ ]
 458                 self.devices_scanned_on_init = [ ]
 459
 460                 self.on_partition_list_change = CList()
 461
 462                 self.enumerateBlockDevices()
 463
 464                 # currently, this is just an enumeration of what's possible,
 465                 # this probably has to be changed to support automount stuff.
 466                 # still, if stuff is mounted into the correct mountpoints by
 467                 # external tools, everything is fine (until somebody inserts
 468                 # a second usb stick.)
 469                 p = [
 470                                         ("/media/hdd", _("Harddisk")),
 471                                         ("/media/card", _("Card")),
 472                                         ("/media/cf", _("Compact Flash")),
 473                                         ("/media/mmc1", _("MMC Card")),
 474                                         ("/media/net", _("Network Mount")),
 475                                         ("/media/ram", _("Ram Disk")),
 476                                         ("/media/usb", _("USB Stick")),
 477                                         ("/", _("Internal Flash"))
 478                                 ]
 479
 480                 self.partitions.extend([ Partition(mountpoint = x[0], description = x[1]) for x in p ])
 481
 482         def getBlockDevInfo(self, blockdev):
 483                 devpath = "/sys/block/" + blockdev
 484                 error = False
 485                 removable = False
 486                 blacklisted = False
 487                 is_cdrom = False
 488                 partitions = []
 489                 try:
 490                         removable = bool(int(readFile(devpath + "/removable")))
 491                         dev = int(readFile(devpath + "/dev").split(':')[0])
 492                         if dev in (7, 31): # loop, mtdblock
 493                                 blacklisted = True
 494                         if blockdev[0:2] == 'sr':
 495                                 is_cdrom = True
 496                         if blockdev[0:2] == 'hd':
 497                                 try:
 498                                         media = readFile("/proc/ide/%s/media" % blockdev)
 499                                         if "cdrom" in media:
 500                                                 is_cdrom = True
 501                                 except IOError:
 502                                         error = True
 503                         # check for partitions
 504                         if not is_cdrom:
 505                                 for partition in listdir(devpath):
 506                                         if partition[0:len(blockdev)] != blockdev:
 507                                                 continue
 508                                         partitions.append(partition)
 509                         else:
 510                                 self.cd = blockdev
 511                 except IOError:
 512                         error = True
 513                 # check for medium
 514                 medium_found = True
 515                 try:
 516                         open("/dev/" + blockdev).close()
 517                 except IOError, err:
 518                         if err.errno == 159: # no medium present
 519                                 medium_found = False
 520
 521                 return error, blacklisted, removable, is_cdrom, partitions, medium_found
 522
 523         def enumerateBlockDevices(self):
 524                 print "enumerating block devices..."
 525                 for blockdev in listdir("/sys/block"):
 526                         error, blacklisted, removable, is_cdrom, partitions, medium_found = self.addHotplugPartition(blockdev)
 527                         if not error and not blacklisted:
 528                                 if medium_found:
 529                                         for part in partitions:
 530                                                 self.addHotplugPartition(part)
 531                                 self.devices_scanned_on_init.append((blockdev, removable, is_cdrom, medium_found))
 532
 533         def getAutofsMountpoint(self, device):
 534                 return "/autofs/%s/" % (device)
 535
 536         def is_hard_mounted(self, device):
 537                 mounts = file('/proc/mounts').read().split('\n')
 538                 for x in mounts:
 539                         if x.find('/autofs') == -1 and x.find(device) != -1:
 540                                 return True
 541                 return False
 542
 543         def addHotplugPartition(self, device, physdev = None):
 544                 if not physdev:
 545                         dev, part = self.splitDeviceName(device)
 546                         try:
 547                                 physdev = path.realpath('/sys/block/' + dev + '/device')[4:]
 548                         except OSError:
 549                                 physdev = dev
 550                                 print "couldn't determine blockdev physdev for device", device
 551
 552                 error, blacklisted, removable, is_cdrom, partitions, medium_found = self.getBlockDevInfo(device)
 553                 print "found block device '%s':" % device,
 554
 555                 if blacklisted:
 556                         print "blacklisted"
 557                 else:
 558                         if error:
 559                                 print "error querying properties"
 560                         elif not medium_found:
 561                                 print "no medium"
 562                         else:
 563                                 print "ok, removable=%s, cdrom=%s, partitions=%s" % (removable, is_cdrom, partitions)
 564
 565                         l = len(device)
 566                         if l:
 567                                 # see if this is a harddrive
 568                                 if not device[l-1].isdigit() and not removable and not is_cdrom:
 569                                         self.hdd.append(Harddisk(device))
 570                                         self.hdd.sort()
 571                                         SystemInfo["Harddisk"] = len(self.hdd) > 0
 572
 573                                 if (not removable or medium_found) and not self.is_hard_mounted(device):
 574                                         # device is the device name, without /dev
 575                                         # physdev is the physical device path, which we (might) use to determine the userfriendly name
 576                                         description = self.getUserfriendlyDeviceName(device, physdev)
 577                                         p = Partition(mountpoint = self.getAutofsMountpoint(device), description = description, force_mounted = True, device = device)
 578                                         self.partitions.append(p)
 579                                         self.on_partition_list_change("add", p)
 580
 581                 return error, blacklisted, removable, is_cdrom, partitions, medium_found
 582
 583         def removeHotplugPartition(self, device):
 584                 mountpoint = self.getAutofsMountpoint(device)
 585                 for x in self.partitions[:]:
 586                         if x.mountpoint == mountpoint:
 587                                 self.partitions.remove(x)
 588                                 self.on_partition_list_change("remove", x)
 589                 l = len(device)
 590                 if l and not device[l-1].isdigit():
 591                         for hdd in self.hdd:
 592                                 if hdd.device == device:
 593                                         hdd.stop()
 594                                         self.hdd.remove(hdd)
 595                                         break
 596                         SystemInfo["Harddisk"] = len(self.hdd) > 0
 597
 598         def HDDCount(self):
 599                 return len(self.hdd)
 600
 601         def HDDList(self):
 602                 list = [ ]
 603                 for hd in self.hdd:
 604                         hdd = hd.model() + " - " + hd.bus()
 605                         cap = hd.capacity()
 606                         if cap != "":
 607                                 hdd += " (" + cap + ")"
 608                         list.append((hdd, hd))
 609                 return list
 610
 611         def getCD(self):
 612                 return self.cd
 613
 614         def getMountedPartitions(self, onlyhotplug = False):
 615                 parts = [x for x in self.partitions if (x.is_hotplug or not onlyhotplug) and x.mounted()]
 616                 devs = set([x.device for x in parts])
 617                 for devname in devs.copy():
 618                         if not devname:
 619                                 continue
 620                         dev, part = self.splitDeviceName(devname)
 621                         if part and dev in devs: # if this is a partition and we still have the wholedisk, remove wholedisk
 622                                 devs.remove(dev)
 623
 624                 # return all devices which are not removed due to being a wholedisk when a partition exists
 625                 return [x for x in parts if not x.device or x.device in devs]
 626
 627         def splitDeviceName(self, devname):
 628                 # this works for: sdaX, hdaX, sr0 (which is in fact dev="sr0", part=""). It doesn't work for other names like mtdblock3, but they are blacklisted anyway.
 629                 dev = devname[:3]
 630                 part = devname[3:]
 631                 for p in part:
 632                         if not p.isdigit():
 633                                 return devname, 0
 634                 return dev, part and int(part) or 0
 635
 636         def getUserfriendlyDeviceName(self, dev, phys):
 637                 dev, part = self.splitDeviceName(dev)
 638                 description = "External Storage %s" % dev
 639                 have_model_descr = False
 640                 try:
 641                         description = readFile("/sys" + phys + "/model")
 642                         have_model_descr = True
 643                 except IOError, s:
 644                         print "couldn't read model: ", s
 645                 from Tools.HardwareInfo import HardwareInfo
 646                 if dev.find('sr') == 0 and dev[2].isdigit():
 647                         devicedb = DEVICEDB_SR
 648                 else:
 649                         devicedb = DEVICEDB
 650                 for physdevprefix, pdescription in devicedb.get(HardwareInfo().device_name,{}).items():
 651                         if phys.startswith(physdevprefix):
 652                                 if have_model_descr:
 653                                         description = pdescription + ' - ' + description
 654                                 else:
 655                                         description = pdescription
 656                 # not wholedisk and not partition 1
 657                 if part and part != 1:
 658                         description += " (Partition %d)" % part
 659                 return description
 660
 661         def addMountedPartition(self, device, desc):
 662                 already_mounted = False
 663                 for x in self.partitions[:]:
 664                         if x.mountpoint == device:
 665                                 already_mounted = True
 666                 if not already_mounted:
 667                         self.partitions.append(Partition(mountpoint = device, description = desc))
 668
 669         def removeMountedPartition(self, mountpoint):
 670                 for x in self.partitions[:]:
 671                         if x.mountpoint == mountpoint:
 672                                 self.partitions.remove(x)
 673                                 self.on_partition_list_change("remove", x)
 674
 675 harddiskmanager = HarddiskManager()