View topic - one partition just went missing; nothing wrong with others

Main » Forums home » Conventional hard drives

All times are UTC - 5 hours [ DST ]

one partition just went missing; nothing wrong with others

Page 1 of 1

[ 2 posts ]

Previous topic | Next topic

Author

Message

yshu

Post subject: one partition just went missing; nothing wrong with others

Posted: November 5th, 2012, 12:43

Joined: November 5th, 2012, 12:19
Posts: 1
Location: 11th planet from sun

i just had a hdd failure (well, at least partiton failure). i am using arch linux.

Code:

$ uname -a
Linux 3.4.9-1-ARCH #1 SMP PREEMPT Wed Aug 15 18:59:31 CEST 2012 x86_64 GNU/Linux

the hard drive is 1tb usb 3.0 wd externel drive (sdc). hd was already plugged in, its first partition (i.e. sdc1,ext4) mounted when the problem happened. i was working, nothing that io to sdc1. then i realized sdc1 is no longer mounted. i tried to mount it,but the command took at least 1m untill i ^C it. there is no uuid entry in /dev/disk/by-uuid/

partition list:

Code:

$ fdisk -l /dev/sdc
/dev/sdc1            2048  1843202047   921600000   83  Linux
/dev/sdc2      1943218176  1953458175     5120000   83  Linux
/dev/sdc3      1843202048  1943218175    50008064    7  HPFS/NTFS/exFAT

i tried to back up it using dd, but that failed too.

Code:

$ dd if=/dev/sdc1 > /mnt/sg/fs
dd: reading '/dev/sdc1': Input/output error
0+0 records in
0+0 records out
0 bytes (0 B) copied, 5.56793 s, 0.0 kB/s

i am not sure that it got locked, because every other partions is working.

syslog:

Code:

Nov  5 01:08:44 localhost kernel: [18427.158620] sd 17:0:0:0: [sdc] Unhandled sense code
Nov  5 01:08:44 localhost kernel: [18427.158627] sd 17:0:0:0: [sdc]  Result: hostbyte=0x00 driverbyte=0x08
Nov  5 01:08:44 localhost kernel: [18427.158632] sd 17:0:0:0: [sdc]  Sense Key : 0x3 [current] 
Nov  5 01:08:44 localhost kernel: [18427.158638] sd 17:0:0:0: [sdc]  ASC=0x11 ASCQ=0x0
Nov  5 01:08:44 localhost kernel: [18427.158643] sd 17:0:0:0: [sdc] CDB: cdb[0]=0x28: 28 00 00 00 08 00 00 00 08 00

smart info

Code:

smartctl 6.0 2012-10-10 r3643 [x86_64-linux-3.4.9-1-ARCH] (local build)
Copyright (C) 2002-12, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital My Passport (USB, AF)
Device Model:     WDC WD10TMVW-11ZSMS4
Serial Number:    xxxx
LU WWN Device Id: xxxx
Firmware Version: 01.01A01
User Capacity:    1,000,204,886,016 bytes [1.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5200 rpm
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 2.6, 3.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Mon Nov  5 22:09:45 2012 IST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART STATUS RETURN: incomplete response, ATA output registers missing
SMART overall-health self-assessment test result: PASSED
Warning: This result is based on an Attribute check.

General SMART Values:
Offline data collection status:  (0x00)   Offline data collection activity
               was never started.
               Auto Offline Data Collection: Disabled.
Self-test execution status:      (   0)   The previous self-test routine completed
               without error or no self-test has ever 
               been run.
Total time to complete Offline 
data collection:       (26460) seconds.
Offline data collection
capabilities:           (0x7b) SMART execute Offline immediate.
               Auto Offline data collection on/off support.
               Suspend Offline collection upon new
               command.
               Offline surface scan supported.
               Self-test supported.
               Conveyance Self-test supported.
               Selective Self-test supported.
SMART capabilities:            (0x0003)   Saves SMART data before entering
               power-saving mode.
               Supports SMART auto save timer.
Error logging capability:        (0x01)   Error logging supported.
               General Purpose Logging supported.
Short self-test routine 
recommended polling time:     (   2) minutes.
Extended self-test routine
recommended polling time:     ( 257) minutes.
Conveyance self-test routine
recommended polling time:     (   5) minutes.
SCT capabilities:           (0x7035)   SCT Status supported.
               SCT Feature Control supported.
               SCT Data Table supported.

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
  3 Spin_Up_Time            0x0027   167   162   021    Pre-fail  Always       -       4608
  4 Start_Stop_Count        0x0032   099   099   000    Old_age   Always       -       1054
  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   098   098   000    Old_age   Always       -       1494
 10 Spin_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
 11 Calibration_Retry_Count 0x0032   100   100   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       574
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       406
193 Load_Cycle_Count        0x0032   195   195   000    Old_age   Always       -       17202
194 Temperature_Celsius     0x0022   119   100   000    Old_age   Always       -       31
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       1
198 Offline_Uncorrectable   0x0030   100   253   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   100   253   000    Old_age   Offline      -       0

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed: read failure       90%      1492         2048
# 2  Short offline       Completed: read failure       90%      1492         2048

SMART Selective self-test log data structure revision number 1
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Not_testing
    2        0        0  Not_testing
    3        0        0  Not_testing
    4        0        0  Not_testing
    5        0        0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

i ran testdisk too. here is testdisk.log, orignally of 560mb , what you see here is first and last 100 lines

Code:

Using locale 'C'.


Mon Nov  5 16:47:45 2012
Command line: TestDisk /log /debug /dev/sdc

TestDisk 6.13, Data Recovery Utility, November 2011
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org
OS: Linux, kernel 3.4.9-1-ARCH (#1 SMP PREEMPT Wed Aug 15 18:59:31 CEST 2012) x86_64
Compiler: GCC 4.6
Compilation date: 2012-02-08T22:31:53
ext2fs lib: 1.42.5, ntfs lib: libntfs-3g, reiserfs lib: 0.3.0.5, ewf lib: none
Hard disk list
Disk /dev/sdc - 1000 GB / 931 GiB - CHS 121597 255 63, sector size=512 - WD My Passport 0740, FW:1003

Partition table type (auto): Intel
Disk /dev/sdc - 1000 GB / 931 GiB - WD My Passport 0740
Partition table type: Intel

Analyse Disk /dev/sdc - 1000 GB / 931 GiB - CHS 121597 255 63
Geometry from i386 MBR: head=255 sector=63
file_pread(3,16,buffer,2051(0/32/36)) read err: Input/output error
file_pread(3,1,buffer,2048(0/32/33)) read err: Input/output error
check_part_i386 failed for partition type 83
NTFS at 114734/5/24
Current partition structure:
No ext2, JFS, Reiser, cramfs or XFS marker
 1 P Linux                    0  32 33 114734   5 23 1843200000
 1 P Linux                    0  32 33 114734   5 23 1843200000
 2 P Linux                120959 187 61 121597  37 40   10240000 [arch_wd]
 3 P HPFS - NTFS          114734   5 24 120959 187 60  100016128 [temp]
No partition is bootable
Computes LBA from CHS for Disk /dev/sdc - 1000 GB / 931 GiB - CHS 121598 255 63
Allow partial last cylinder : Yes
search_vista_part: 1

search_part()
Disk /dev/sdc - 1000 GB / 931 GiB - CHS 121598 255 63
file_pread(3,16,buffer,2048(0/32/33)) read err: Input/output error
file_pread(3,1,buffer,2048(0/32/33)) read err: Input/output error

     Linux                  130 170 41   130 203 17       2056
     LUKS 1 (Data size unknown), 1052 KB / 1028 KiB
file_pread(3,16,buffer,5615632(349/142/2)) read err: Partial read
file_pread(3,16,buffer,5615679(349/142/49)) read err: Input/output error
file_pread(3,1,buffer,5615679(349/142/49)) read err: Input/output error
file_pread(3,8,buffer,5615695(349/143/2)) read err: Input/output error
file_pread(3,11,buffer,5615742(349/143/49)) read err: Input/output error
file_pread(3,2,buffer,5617664(349/174/18)) read err: Input/output error
file_pread(3,6,buffer,5617666(349/174/20)) read err: Input/output error
file_pread(3,8,buffer,5617672(349/174/26)) read err: Input/output error
file_pread(3,3,buffer,5617680(349/174/34)) read err: Input/output error
file_pread(3,3,buffer,5617727(349/175/18)) read err: Input/output error
file_pread(3,8,buffer,5617743(349/175/34)) read err: Input/output error
file_pread(3,11,buffer,5617790(349/176/18)) read err: Input/output error
file_pread(3,2,buffer,5619712(349/206/50)) read err: Input/output error
file_pread(3,6,buffer,5619714(349/206/52)) read err: Input/output error
file_pread(3,8,buffer,5619720(349/206/58)) read err: Input/output error
file_pread(3,3,buffer,5619728(349/207/3)) read err: Input/output error
file_pread(3,3,buffer,5619775(349/207/50)) read err: Input/output error
file_pread(3,8,buffer,5619791(349/208/3)) read err: Input/output error
file_pread(3,11,buffer,5619838(349/208/50)) read err: Input/output error
file_pread(3,2,buffer,5621760(349/239/19)) read err: Input/output error
file_pread(3,6,buffer,5621762(349/239/21)) read err: Input/output error
file_pread(3,8,buffer,5621768(349/239/27)) read err: Input/output error
file_pread(3,3,buffer,5621776(349/239/35)) read err: Input/output error
file_pread(3,3,buffer,5621823(349/240/19)) read err: Input/output error
file_pread(3,8,buffer,5621839(349/240/35)) read err: Input/output error
file_pread(3,11,buffer,5621886(349/241/19)) read err: Input/output error
file_pread(3,2,buffer,5623808(350/16/51)) read err: Input/output error
file_pread(3,8,buffer,5622750(350/0/1)) read err: Input/output error
file_pread(3,8,buffer,5622758(350/0/9)) read err: Input/output error
file_pread(3,3,buffer,5622766(350/0/17)) read err: Input/output error
file_pread(3,3,buffer,5622813(350/1/1)) read err: Input/output error
file_pread(3,8,buffer,5622829(350/1/17)) read err: Input/output error
file_pread(3,11,buffer,5622876(350/2/1)) read err: Input/output error
file_pread(3,2,buffer,5624798(350/32/33)) read err: Input/output error
file_pread(3,5,buffer,5622816(350/1/4)) read err: Input/output error
file_pread(3,8,buffer,5622821(350/1/9)) read err: Input/output error
file_pread(3,8,buffer,5622892(350/2/17)) read err: Input/output error
file_pread(3,11,buffer,5622939(350/3/1)) read err: Input/output error
file_pread(3,2,buffer,5624861(350/33/33)) read err: Input/output error
file_pread(3,6,buffer,5623810(350/16/53)) read err: Input/output error
file_pread(3,8,buffer,5623816(350/16/59)) read err: Input/output error
file_pread(3,3,buffer,5623824(350/17/4)) read err: Input/output error
file_pread(3,3,buffer,5623871(350/17/51)) read err: Input/output error
file_pread(3,8,buffer,5623887(350/18/4)) read err: Input/output error
file_pread(3,11,buffer,5623934(350/18/51)) read err: Input/output error
file_pread(3,2,buffer,5625856(350/49/20)) read err: Input/output error
file_pread(3,6,buffer,5625858(350/49/22)) read err: Input/output error
file_pread(3,8,buffer,5625864(350/49/28)) read err: Input/output error
file_pread(3,3,buffer,5625872(350/49/36)) read err: Input/output error
file_pread(3,3,buffer,5625919(350/50/20)) read err: Input/output error
file_pread(3,8,buffer,5625935(350/50/36)) read err: Input/output error
file_pread(3,11,buffer,5625982(350/51/20)) read err: Input/output error
file_pread(3,2,buffer,5627904(350/81/52)) read err: Input/output error
file_pread(3,6,buffer,5627906(350/81/54)) read err: Input/output error
file_pread(3,8,buffer,5627912(350/81/60)) read err: Input/output error
file_pread(3,3,buffer,5627920(350/82/5)) read err: Input/output error
.
.
.
file_pread(3,11,buffer,1953439866(121596/2/1)) read err: Input/output error
file_pread(3,2,buffer,1953441788(121596/32/33)) read err: Input/output error
file_pread(3,1,buffer,1953439759(121596/0/20)) read err: Input/output error
file_pread(3,3,buffer,1953439760(121596/0/21)) read err: Input/output error
file_pread(3,3,buffer,1953439807(121596/1/5)) read err: Input/output error
file_pread(3,4,buffer,1953439827(121596/1/25)) read err: Input/output error
file_pread(3,4,buffer,1953439877(121596/2/12)) read err: Input/output error
file_pread(3,2,buffer,1953441792(121596/32/37)) read err: Input/output error
file_pread(3,5,buffer,1953439806(121596/1/4)) read err: Input/output error
file_pread(3,8,buffer,1953439811(121596/1/9)) read err: Input/output error
file_pread(3,8,buffer,1953439882(121596/2/17)) read err: Input/output error
file_pread(3,11,buffer,1953439929(121596/3/1)) read err: Input/output error
file_pread(3,2,buffer,1953441851(121596/33/33)) read err: Input/output error
file_pread(3,6,buffer,1953441794(121596/32/39)) read err: Input/output error
file_pread(3,8,buffer,1953441800(121596/32/45)) read err: Input/output error
file_pread(3,3,buffer,1953441808(121596/32/53)) read err: Input/output error
file_pread(3,3,buffer,1953441855(121596/33/37)) read err: Input/output error
file_pread(3,8,buffer,1953441871(121596/33/53)) read err: Input/output error
file_pread(3,11,buffer,1953441918(121596/34/37)) read err: Input/output error
file_pread(3,2,buffer,1953443840(121596/65/6)) read err: Input/output error
file_pread(3,6,buffer,1953443842(121596/65/8)) read err: Input/output error
file_pread(3,8,buffer,1953443848(121596/65/14)) read err: Input/output error
file_pread(3,3,buffer,1953443856(121596/65/22)) read err: Input/output error
file_pread(3,3,buffer,1953443903(121596/66/6)) read err: Input/output error
file_pread(3,8,buffer,1953443919(121596/66/22)) read err: Input/output error
file_pread(3,11,buffer,1953443966(121596/67/6)) read err: Input/output error
file_pread(3,2,buffer,1953445888(121596/97/38)) read err: Input/output error
file_pread(3,6,buffer,1953445890(121596/97/40)) read err: Input/output error
file_pread(3,8,buffer,1953445896(121596/97/46)) read err: Input/output error
file_pread(3,3,buffer,1953445904(121596/97/54)) read err: Input/output error
file_pread(3,3,buffer,1953445951(121596/98/38)) read err: Input/output error
file_pread(3,8,buffer,1953445967(121596/98/54)) read err: Input/output error
file_pread(3,11,buffer,1953446014(121596/99/38)) read err: Input/output error
file_pread(3,2,buffer,1953447936(121596/130/7)) read err: Input/output error
file_pread(3,6,buffer,1953447938(121596/130/9)) read err: Input/output error
file_pread(3,8,buffer,1953447944(121596/130/15)) read err: Input/output error
file_pread(3,3,buffer,1953447952(121596/130/23)) read err: Input/output error
file_pread(3,3,buffer,1953447999(121596/131/7)) read err: Input/output error
file_pread(3,8,buffer,1953448015(121596/131/23)) read err: Input/output error
file_pread(3,11,buffer,1953448062(121596/132/7)) read err: Input/output error
file_pread(3,2,buffer,1953449984(121596/162/39)) read err: Input/output error
file_pread(3,6,buffer,1953449986(121596/162/41)) read err: Input/output error
file_pread(3,8,buffer,1953449992(121596/162/47)) read err: Input/output error
file_pread(3,3,buffer,1953450000(121596/162/55)) read err: Input/output error
file_pread(3,3,buffer,1953450047(121596/163/39)) read err: Input/output error
file_pread(3,8,buffer,1953450063(121596/163/55)) read err: Input/output error
file_pread(3,11,buffer,1953450110(121596/164/39)) read err: Input/output error
file_pread(3,2,buffer,1953452032(121596/195/8)) read err: Input/output error
file_pread(3,6,buffer,1953452034(121596/195/10)) read err: Input/output error
file_pread(3,8,buffer,1953452040(121596/195/16)) read err: Input/output error
file_pread(3,3,buffer,1953452048(121596/195/24)) read err: Input/output error
file_pread(3,3,buffer,1953452095(121596/196/8)) read err: Input/output error
file_pread(3,8,buffer,1953452111(121596/196/24)) read err: Input/output error
file_pread(3,11,buffer,1953452158(121596/197/8)) read err: Input/output error
file_pread(3,2,buffer,1953454080(121596/227/40)) read err: Input/output error
file_pread(3,6,buffer,1953454082(121596/227/42)) read err: Input/output error
file_pread(3,8,buffer,1953454088(121596/227/48)) read err: Input/output error
file_pread(3,3,buffer,1953454096(121596/227/56)) read err: Input/output error
file_pread(3,3,buffer,1953454143(121596/228/40)) read err: Input/output error
file_pread(3,8,buffer,1953454159(121596/228/56)) read err: Input/output error
file_pread(3,11,buffer,1953454206(121596/229/40)) read err: Input/output error
file_pread(3,2,buffer,1953456128(121597/5/9)) read err: Input/output error
file_pread(3,8,buffer,1953455805(121597/0/1)) read err: Input/output error
file_pread(3,8,buffer,1953455813(121597/0/9)) read err: Input/output error
file_pread(3,3,buffer,1953455821(121597/0/17)) read err: Input/output error
file_pread(3,3,buffer,1953455868(121597/1/1)) read err: Input/output error
file_pread(3,8,buffer,1953455884(121597/1/17)) read err: Input/output error
file_pread(3,11,buffer,1953455931(121597/2/1)) read err: Input/output error
file_pread(3,2,buffer,1953457853(121597/32/33)) read err: Input/output error
file_pread(3,5,buffer,1953455871(121597/1/4)) read err: Input/output error
file_pread(3,8,buffer,1953455876(121597/1/9)) read err: Input/output error
file_pread(3,8,buffer,1953455947(121597/2/17)) read err: Input/output error
file_pread(3,11,buffer,1953455994(121597/3/1)) read err: Input/output error
file_pread(3,2,buffer,1953457916(121597/33/33)) read err: Input/output error
file_pread(3,6,buffer,1953456130(121597/5/11)) read err: Input/output error
file_pread(3,8,buffer,1953456136(121597/5/17)) read err: Input/output error
file_pread(3,3,buffer,1953456144(121597/5/25)) read err: Input/output error
file_pread(3,3,buffer,1953456191(121597/6/9)) read err: Input/output error
file_pread(3,8,buffer,1953456207(121597/6/25)) read err: Input/output error
file_pread(3,11,buffer,1953456254(121597/7/9)) read err: Input/output error

Results
   L Linux                  130 170 41   130 254 63       5315
     LUKS 1 (Data size unknown), 2721 KB / 2657 KiB

interface_write()
 1 E extended               130 170  1   130 254 63       5355
 5 L Linux                  130 170 41   130 254 63       5315
simulate write!

write_mbr_i386: starting...
file_pread(3,1,buffer,0(0/0/1)) read err: Input/output error

Partition: Read error
Store new MBR code
write_all_log_i386: starting...
write_all_log_i386: CHS: 130/170/1,lba=2099160
file_pread(3,1,buffer,2099160(130/170/1)) read err: Input/output error

TestDisk exited normally.

the topic is also being followed at linuxquestion https://www.linuxquestions.org/question ... ?p=4822153

any help is appriciated .
thanks

Top

Vulcan

Post subject: Re: one partition just went missing; nothing wrong with othe

Posted: November 6th, 2012, 15:26

Joined: May 6th, 2008, 22:53
Posts: 2138
Location: England

There is some contradiction between the drive's view of the problem (only 1 logged unreadable sector - SMART attribute 197 raw value) and the various Linux I/O error messages which refer to many other parts of the disk.

The "obvious" unreadable sector is LBA 2048 which is the first sector in /dev/sdc1 and that is why your dd attempt failed immediately. The other I/O errors reported by Linux could be due to poor I/O error handling by Linux drivers, or the behaviour of the USB-SATA bridge (these often have error handling issues), or something else which should preferably be diagnosed by someone who has the drive in front of him. Either way, that contradiction in reported errors exists, so the real situation is not completely clear. However - do NOT try to run fsck or similar, on any disk with unreadable sectors, like yours. It can make things much worse.

There are a few different possible DIY approaches, but as with any DIY, they have risks, especially for the inexperienced. I believe that WD enclosure (and in your case therefore probably the drive's PCB itself) has "Smartware" built-in encryption, so it's likely that you can't avoid using the USB interface for any attempted DIY recovery.

If the data is valuable (i.e. you don't want to risk it), I suggest that the services of a DR company experienced with these WD drives, would be worth you considering. However if you prefer to take risks, and are prepared to accept the consequences of your actions, then search the forum for discussions about cloning (if you're comfortable with Linux then read about GNU ddrescue, for example), for which you'll need (at least) another 1TB of unused disk space (personally I would use 2 x 1TB disks in a specific technique in this situation to try to minimise risks, but some people accuse me of being over-cautious and spending more on temporary disks than is necessary

). Do lots of research first, to reduce your chances of making a mistake. That cloning process (if it completes) will also confirm how many user LBAs are unreadable using normal techniques, as part of the cloning process.

If you're lucky, then recovery from the readable clone can then be attempted. If you're unlucky and the disk deteriorates during cloning (or if you make a catastrophic mistake), then the recovery becomes much harder or impossible.

As always, remote diagnosis accuracy is limited and the results often incomplete, but these comments are an overview of how I see your situation, based on my interpretation of the information supplied. Others may interpret your comments differently and offer alternative views. Ultimately it's your data; your risk; your choice.

Top

Page 1 of 1

[ 2 posts ]

Main » Forums home » Conventional hard drives

All times are UTC - 5 hours [ DST ]

Who is online

Users browsing this forum: No registered users and 41 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum