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Disk Recovery suggestions welcomed...

Subject: Disk Recovery suggestions welcomed...
From: lug at the-leveys.us (Don Levey)
Date: Thu, 15 Dec 2005 14:46:13 -0500
Last weekend, just before I left the continent on a trip, one of the
partitions on my family server's hard drive seems to have crashed.  In
particular, I had a separate partition for /home, and the system (after
several power failures overnight) eventually refused to boot up with read
errors on /home.

I've found a few suggestions for diagnostics - output from e2fsck and
smartctl are below.  I'm hoping for one of two things (if not both):
1) Is there any way to repair/work around this problem, and
2) Is there any way to mount the partition even temporarily so I can recover
the data?

Eventually I'm sure I'll need to replace the drive; the other partitions are
accessible and seem OK for now.  Any thoughts?

Thanks in advance,
 -Don

diagnostic output:


root at davinci log]# fdisk -l

Disk /dev/hda: 163.9 GB, 163928604672 bytes
255 heads, 63 sectors/track, 19929 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1        6374    51199123+  83  Linux
/dev/hda2            6375       13258    55295730   83  Linux
/dev/hda3           13259       19632    51199155   83  Linux
/dev/hda4           19633       19929     2385652+   f  W95 Ext'd (LBA)
/dev/hda5           19633       19928     2377588+  82  Linux swap



[root at davinci log]# e2fsck -c /dev/hda3
e2fsck 1.35 (28-Feb-2004)
/home1: Attempt to read block from filesystem resulted in short read while
reading block 524

/home1: Attempt to read block from filesystem resulted in short read reading
journal superblock

e2fsck: Attempt to read block from filesystem resulted in short read while
checking ext3 journal for /home1


[root at davinci log]# smartctl -a /dev/hda3
smartctl version 5.21 Copyright (C) 2002-3 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF INFORMATION SECTION ===
Device Model:     Maxtor 6Y160P0
Serial Number:    Y41QV0VE
Firmware Version: YAR41BW0
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   7
ATA Standard is:  ATA/ATAPI-7 T13 1532D revision 0
Local Time is:    Thu Dec 15 10:30:28 2005 EST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x80)	Offline data collection activity was
					never started.
					Auto Offline Data Collection: Enabled.
Self-test execution status:      ( 118)	The previous self-test completed
having
					the read element of the test failed.
Total time to complete Offline
data collection: 		 ( 302) seconds.
Offline data collection
capabilities: 			 (0x5b) SMART execute Offline immediate.
					Auto Offline data collection on/off support.
					Suspend Offline collection upon new
					command.
					Offline surface scan supported.
					Self-test supported.
					No 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.
					No General Purpose Logging support.
Short self-test routine
recommended polling time: 	 (   2) minutes.
Extended self-test routine
recommended polling time: 	 (  72) minutes.

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
  3 Spin_Up_Time            0x0027   203   202   063    Pre-fail
s       -       8872
  4 Start_Stop_Count        0x0032   253   253   000    Old_age
ys       -       43
  5 Reallocated_Sector_Ct   0x0033   252   252   063    Pre-fail
s       -       14
  6 Read_Channel_Margin     0x0001   253   253   100    Pre-fail
ine      -       0
  7 Seek_Error_Rate         0x000a   253   252   000    Old_age
ys       -       0
  8 Seek_Time_Performance   0x0027   250   247   187    Pre-fail
s       -       48220
  9 Power_On_Minutes        0x0032   219   219   000    Old_age
ys       -       972h+17m
 10 Spin_Retry_Count        0x002b   253   252   157    Pre-fail
s       -       0
 11 Calibration_Retry_Count 0x002b   253   252   223    Pre-fail
s       -       0
 12 Power_Cycle_Count       0x0032   253   253   000    Old_age
ys       -       64
192 Power-Off_Retract_Count 0x0032   253   253   000    Old_age
ys       -       0
193 Load_Cycle_Count        0x0032   253   253   000    Old_age
ys       -       0
194 Temperature_Celsius     0x0032   253   253   000    Old_age
ys       -       35
195 Hardware_ECC_Recovered  0x000a   253   252   000    Old_age
ys       -       31427
196 Reallocated_Event_Count 0x0008   253   253   000    Old_age
line      -       0
197 Current_Pending_Sector  0x0008   253   253   000    Old_age
line      -       4
198 Offline_Uncorrectable   0x0008   252   252   000    Old_age
line      -       1
199 UDMA_CRC_Error_Count    0x0008   199   199   000    Old_age
line      -       0
200 Multi_Zone_Error_Rate   0x000a   253   252   000    Old_age
ys       -       0
201 Soft_Read_Error_Rate    0x000a   253   244   000    Old_age
ys       -       564
202 TA_Increase_Count       0x000a   253   252   000    Old_age
ys       -       1
203 Run_Out_Cancel          0x000b   253   252   180    Pre-fail
s       -       38
204 Shock_Count_Write_Opern 0x000a   253   252   000    Old_age
ys       -       0
205 Shock_Rate_Write_Opern  0x000a   253   252   000    Old_age
ys       -       0
207 Spin_High_Current       0x002a   253   252   000    Old_age
ys       -       0
208 Spin_Buzz               0x002a   253   252   000    Old_age
ys       -       0
209 Offline_Seek_Performnce 0x0024   195   195   000    Old_age
line      -       0
 99 Unknown_Attribute       0x0004   253   253   000    Old_age
line      -       0
100 Unknown_Attribute       0x0004   253   253   000    Old_age
line      -       0
101 Unknown_Attribute       0x0004   253   253   000    Old_age
line      -       0

SMART Error Log Version: 1
Warning: ATA error count 104 inconsistent with error log pointer 5

ATA Error Count: 104 (device log contains only the most recent five errors)
	CR = Command Register [HEX]
	FR = Features Register [HEX]
	SC = Sector Count Register [HEX]
	SN = Sector Number Register [HEX]
	CL = Cylinder Low Register [HEX]
	CH = Cylinder High Register [HEX]
	DH = Device/Head Register [HEX]
	DC = Device Command Register [HEX]
	ER = Error register [HEX]
	ST = Status register [HEX]
Timestamp = decimal seconds since the previous disk power-on.
Note: timestamp "wraps" after 2^32 msec = 49.710 days.

Error 104 occurred at disk power-on lifetime: 11151 hours
  When the command that caused the error occurred, the device was in an
unknown state.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 02 b0 07 b2 e0

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Timestamp  Command/Feature_Name
  -- -- -- -- -- -- -- --   ---------  --------------------
  25 00 02 b0 07 b2 e0 08 1133623.072  READ DMA EXT
  25 00 04 ae 07 b2 e0 08 1133622.064  READ DMA EXT
  25 00 06 ac 07 b2 e0 08 1133621.248  READ DMA EXT
  25 00 06 ac 07 b2 e0 08 1133619.216  READ DMA EXT
  25 00 08 aa 07 b2 e0 08 1133618.192  READ DMA EXT

Error 103 occurred at disk power-on lifetime: 11151 hours
  When the command that caused the error occurred, the device was in an
unknown state.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 04 ae 07 b2 e0

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Timestamp  Command/Feature_Name
  -- -- -- -- -- -- -- --   ---------  --------------------
  25 00 04 ae 07 b2 e0 08 1133622.064  READ DMA EXT
  25 00 06 ac 07 b2 e0 08 1133621.248  READ DMA EXT
  25 00 06 ac 07 b2 e0 08 1133619.216  READ DMA EXT
  25 00 08 aa 07 b2 e0 08 1133618.192  READ DMA EXT
  35 00 08 77 00 38 e0 08 1133618.192  WRITE DMA EXT

Error 102 occurred at disk power-on lifetime: 11151 hours
  When the command that caused the error occurred, the device was in an
unknown state.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 06 ac 07 b2 e0

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Timestamp  Command/Feature_Name
  -- -- -- -- -- -- -- --   ---------  --------------------
  25 00 06 ac 07 b2 e0 08 1133621.248  READ DMA EXT
  25 00 06 ac 07 b2 e0 08 1133619.216  READ DMA EXT
  25 00 08 aa 07 b2 e0 08 1133618.192  READ DMA EXT
  35 00 08 77 00 38 e0 08 1133618.192  WRITE DMA EXT
  35 00 18 57 00 38 e0 08 1133618.192  WRITE DMA EXT

Error 101 occurred at disk power-on lifetime: 11151 hours
  When the command that caused the error occurred, the device was in an
unknown state.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  01 51 06 ac 07 b2 e0

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Timestamp  Command/Feature_Name
  -- -- -- -- -- -- -- --   ---------  --------------------
  25 00 06 ac 07 b2 e0 08 1133619.216  READ DMA EXT
  25 00 08 aa 07 b2 e0 08 1133618.192  READ DMA EXT
  35 00 08 77 00 38 e0 08 1133618.192  WRITE DMA EXT
  35 00 18 57 00 38 e0 08 1133618.192  WRITE DMA EXT
  25 00 50 b2 07 b2 e0 08 1133618.192  READ DMA EXT

Error 100 occurred at disk power-on lifetime: 11151 hours
  When the command that caused the error occurred, the device was in an
unknown state.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 08 aa 07 b2 e0

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Timestamp  Command/Feature_Name
  -- -- -- -- -- -- -- --   ---------  --------------------
  25 00 08 aa 07 b2 e0 08 1133618.192  READ DMA EXT
  35 00 08 77 00 38 e0 08 1133618.192  WRITE DMA EXT
  35 00 18 57 00 38 e0 08 1133618.192  WRITE DMA EXT
  25 00 50 b2 07 b2 e0 08 1133618.192  READ DMA EXT
  25 00 52 b0 07 b2 e0 08 1133617.184  READ DMA EXT

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       30%     11151
0x061e7966
# 2  Short offline       Completed: read failure       60%     11151
0x0cb207aa
Follow-Ups:
- Disk Recovery suggestions welcomed...
  - From: jbk at mail2.gis.net (jbk)
- Disk Recovery suggestions welcomed...
  - From: jack at coats.org (Jack Coats)
- Disk Recovery suggestions welcomed...
  - From: dsr at tao.merseine.nu (dsr at tao.merseine.nu)
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