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Old 10-17-2013, 03:50 AM   #1
tkalfaoglu
Member
 
Registered: Oct 2003
Location: Izmir, Turkey
Distribution: Fedora Core 10
Posts: 54

Rep: Reputation: 15
Unhappy RAID1 setup failing


Hello there. I have two drives on my system that are using RAID1. Or they should be.

I found some ugly log entries about /dev/sdb that hinted drive failures, so I checked the current RAID situation:

Code:
# cat /proc/mdstat 
Personalities : [raid1] 
md1 : active raid1 sdb2[1]
      524276 blocks super 1.0 [2/1] [_U]
      
md2 : active raid1 sdb3[1]
      1073741688 blocks super 1.0 [2/1] [_U]
      
md3 : active raid1 sdb5[1]
      1822445428 blocks super 1.0 [2/1] [_U]
      
md0 : active raid1 sdb1[1]
      33553336 blocks super 1.0 [2/1] [_U]
It seems the sda has vanished altogether.
The errors I saw in the logs were for sdb, however!

the mdadm --detail seem to show the same thing for all four:
Code:
# mdadm --detail /dev/md[0-3]
/dev/md0:
        Version : 1.0
  Creation Time : Fri May  4 12:22:49 2012
     Raid Level : raid1
     Array Size : 33553336 (32.00 GiB 34.36 GB)
  Used Dev Size : 33553336 (32.00 GiB 34.36 GB)
   Raid Devices : 2
  Total Devices : 1
    Persistence : Superblock is persistent

    Update Time : Thu Oct 17 10:45:43 2013
          State : clean, degraded 
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
  Spare Devices : 0

           Name : rescue:0
           UUID : ece0ab37:14df2adb:a872f0cb:070e4a41
         Events : 13229

    Number   Major   Minor   RaidDevice State
       0       0        0        0      removed
       1       8       17        1      active sync   /dev/sdb1
/dev/md1:
        Version : 1.0
  Creation Time : Fri May  4 12:22:49 2012
     Raid Level : raid1
     Array Size : 524276 (512.07 MiB 536.86 MB)
  Used Dev Size : 524276 (512.07 MiB 536.86 MB)
   Raid Devices : 2
  Total Devices : 1
    Persistence : Superblock is persistent

    Update Time : Thu Oct 17 10:45:46 2013
          State : clean, degraded 
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
  Spare Devices : 0

           Name : rescue:1
           UUID : a4ea625c:4ab33d67:4e76fba2:a50564d3
         Events : 685

    Number   Major   Minor   RaidDevice State
       0       0        0        0      removed
       1       8       18        1      active sync   /dev/sdb2
/dev/md2:
        Version : 1.0
  Creation Time : Fri May  4 12:22:49 2012
     Raid Level : raid1
     Array Size : 1073741688 (1024.00 GiB 1099.51 GB)
  Used Dev Size : 1073741688 (1024.00 GiB 1099.51 GB)
   Raid Devices : 2
  Total Devices : 1
    Persistence : Superblock is persistent

    Update Time : Thu Oct 17 10:46:19 2013
          State : clean, degraded 
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
  Spare Devices : 0

           Name : rescue:2
           UUID : 8b382fb8:d808a616:81518b21:7702d11c
         Events : 21146467

    Number   Major   Minor   RaidDevice State
       0       0        0        0      removed
       1       8       19        1      active sync   /dev/sdb3
/dev/md3:
        Version : 1.0
  Creation Time : Fri May  4 12:22:50 2012
     Raid Level : raid1
     Array Size : 1822445428 (1738.02 GiB 1866.18 GB)
  Used Dev Size : 1822445428 (1738.02 GiB 1866.18 GB)
   Raid Devices : 2
  Total Devices : 1
    Persistence : Superblock is persistent

    Update Time : Thu Oct 17 10:46:19 2013
          State : clean, degraded 
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
  Spare Devices : 0

           Name : rescue:3
           UUID : e111e86d:ffab5777:05864809:881b60b9
         Events : 10824818

    Number   Major   Minor   RaidDevice State
       0       0        0        0      removed
       1       8       21        1      active sync   /dev/sdb5
Interestingly SMART shows that both drives have PASSED tests - but the second one shows some errors in sdb...

Code:
# smartctl -a /dev/sda
smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-358.6.1.el6.x86_64] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda (SATA 3Gb/s, 4K Sectors)
Device Model:     ST3000DM001-9YN166
Serial Number:    S1F08XWY
LU WWN Device Id: 5 000c50 04a6734db
Firmware Version: CC4B
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   8
ATA Standard is:  ATA-8-ACS revision 4
Local Time is:    Thu Oct 17 10:47:19 2013 CEST
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:  (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: 		(  575) seconds.
Offline data collection
capabilities: 			 (0x73) SMART execute Offline immediate.
					Auto Offline data collection on/off support.
					Suspend Offline collection upon new
					command.
					No 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: 	 (   1) minutes.
Extended self-test routine
recommended polling time: 	 ( 332) minutes.
Conveyance self-test routine
recommended polling time: 	 (   2) minutes.
SCT capabilities: 	       (0x3085)	SCT Status supported.

SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000f   115   099   006    Pre-fail  Always       -       100194456
  3 Spin_Up_Time            0x0003   094   094   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       8
  5 Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   085   060   030    Pre-fail  Always       -       358638930
  9 Power_On_Hours          0x0032   086   086   000    Old_age   Always       -       12892
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       8
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   094   094   000    Old_age   Always       -       6
188 Command_Timeout         0x0032   100   100   000    Old_age   Always       -       30065229831
189 High_Fly_Writes         0x003a   098   098   000    Old_age   Always       -       2
190 Airflow_Temperature_Cel 0x0022   066   060   045    Old_age   Always       -       34 (Min/Max 33/35)
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       6
193 Load_Cycle_Count        0x0032   099   099   000    Old_age   Always       -       3578
194 Temperature_Celsius     0x0022   034   040   000    Old_age   Always       -       34 (0 22 0 0 0)
197 Current_Pending_Sector  0x0012   100   001   000    Old_age   Always       -       32
198 Offline_Uncorrectable   0x0010   100   001   000    Old_age   Offline      -       32
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       1
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       254996503338611
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       81671864152787
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       36054295239115
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 without error       00%         5         -

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.

Code:
# smartctl -a /dev/sdb
smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-358.6.1.el6.x86_64] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda (SATA 3Gb/s, 4K Sectors)
Device Model:     ST3000DM001-9YN166
Serial Number:    S1F0AY5R
LU WWN Device Id: 5 000c50 04a66e387
Firmware Version: CC4B
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   8
ATA Standard is:  ATA-8-ACS revision 4
Local Time is:    Thu Oct 17 10:48:01 2013 CEST
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:  (0x00)	Offline data collection activity
					was never started.
					Auto Offline Data Collection: Disabled.
Self-test execution status:      ( 241)	Self-test routine in progress...
					10% of test remaining.
Total time to complete Offline 
data collection: 		(  584) seconds.
Offline data collection
capabilities: 			 (0x73) SMART execute Offline immediate.
					Auto Offline data collection on/off support.
					Suspend Offline collection upon new
					command.
					No 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: 	 (   1) minutes.
Extended self-test routine
recommended polling time: 	 ( 327) minutes.
Conveyance self-test routine
recommended polling time: 	 (   2) minutes.
SCT capabilities: 	       (0x3085)	SCT Status supported.

SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000f   101   087   006    Pre-fail  Always       -       178148976
  3 Spin_Up_Time            0x0003   094   094   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       8
  5 Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   089   060   030    Pre-fail  Always       -       930418501
  9 Power_On_Hours          0x0032   086   086   000    Old_age   Always       -       12911
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       8
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   001   001   000    Old_age   Always       -       8023
188 Command_Timeout         0x0032   100   100   000    Old_age   Always       -       73015558162
189 High_Fly_Writes         0x003a   097   097   000    Old_age   Always       -       3
190 Airflow_Temperature_Cel 0x0022   061   058   045    Old_age   Always       -       39 (Min/Max 35/42)
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       6
193 Load_Cycle_Count        0x0032   099   099   000    Old_age   Always       -       3558
194 Temperature_Celsius     0x0022   039   042   000    Old_age   Always       -       39 (0 20 0 0 0)
197 Current_Pending_Sector  0x0012   100   001   000    Old_age   Always       -       104
198 Offline_Uncorrectable   0x0010   100   001   000    Old_age   Offline      -       104
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       2
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       121925531610341
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       94990143673891
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       148304876351957

SMART Error Log Version: 1
ATA Error Count: 8061 (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]
Powered_Up_Time is measured from power on, and printed as
DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes,
SS=sec, and sss=millisec. It "wraps" after 49.710 days.

Error 8061 occurred at disk power-on lifetime: 12911 hours (537 days + 23 hours)
  When the command that caused the error occurred, the device was doing SMART Offline or Self-test.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 00 ff ff ff 0f  Error: UNC at LBA = 0x0fffffff = 268435455

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  60 00 40 ff ff ff 4f 00   6d+00:57:43.807  READ FPDMA QUEUED
  ef 10 02 00 00 00 a0 00   6d+00:57:43.807  SET FEATURES [Reserved for Serial ATA]
  27 00 00 00 00 00 e0 00   6d+00:57:43.807  READ NATIVE MAX ADDRESS EXT
  ec 00 00 00 00 00 a0 00   6d+00:57:43.806  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 00   6d+00:57:43.806  SET FEATURES [Set transfer mode]

Error 8060 occurred at disk power-on lifetime: 12911 hours (537 days + 23 hours)
  When the command that caused the error occurred, the device was doing SMART Offline or Self-test.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 00 ff ff ff 0f  Error: UNC at LBA = 0x0fffffff = 268435455

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  60 00 40 ff ff ff 4f 00   6d+00:57:40.829  READ FPDMA QUEUED
  ef 10 02 00 00 00 a0 00   6d+00:57:40.829  SET FEATURES [Reserved for Serial ATA]
  27 00 00 00 00 00 e0 00   6d+00:57:40.829  READ NATIVE MAX ADDRESS EXT
  ec 00 00 00 00 00 a0 00   6d+00:57:40.828  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 00   6d+00:57:40.828  SET FEATURES [Set transfer mode]

Error 8059 occurred at disk power-on lifetime: 12911 hours (537 days + 23 hours)
  When the command that caused the error occurred, the device was doing SMART Offline or Self-test.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 00 ff ff ff 0f  Error: UNC at LBA = 0x0fffffff = 268435455

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  60 00 40 ff ff ff 4f 00   6d+00:57:37.818  READ FPDMA QUEUED
  ef 10 02 00 00 00 a0 00   6d+00:57:37.817  SET FEATURES [Reserved for Serial ATA]
  27 00 00 00 00 00 e0 00   6d+00:57:37.817  READ NATIVE MAX ADDRESS EXT
  ec 00 00 00 00 00 a0 00   6d+00:57:37.817  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 00   6d+00:57:37.817  SET FEATURES [Set transfer mode]

Error 8058 occurred at disk power-on lifetime: 12911 hours (537 days + 23 hours)
  When the command that caused the error occurred, the device was doing SMART Offline or Self-test.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 00 ff ff ff 0f  Error: UNC at LBA = 0x0fffffff = 268435455

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  60 00 40 ff ff ff 4f 00   6d+00:57:34.837  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00   6d+00:57:34.837  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00   6d+00:57:34.836  READ FPDMA QUEUED
  ef 10 02 00 00 00 a0 00   6d+00:57:34.836  SET FEATURES [Reserved for Serial ATA]
  27 00 00 00 00 00 e0 00   6d+00:57:34.836  READ NATIVE MAX ADDRESS EXT

Error 8057 occurred at disk power-on lifetime: 12911 hours (537 days + 23 hours)
  When the command that caused the error occurred, the device was doing SMART Offline or Self-test.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 00 ff ff ff 0f  Error: UNC at LBA = 0x0fffffff = 268435455

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  60 00 08 ff ff ff 4f 00   6d+00:57:31.875  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00   6d+00:57:31.875  READ FPDMA QUEUED
  60 00 40 ff ff ff 4f 00   6d+00:57:31.875  READ FPDMA QUEUED
  ef 10 02 00 00 00 a0 00   6d+00:57:31.875  SET FEATURES [Reserved for Serial ATA]
  27 00 00 00 00 00 e0 00   6d+00:57:31.875  READ NATIVE MAX ADDRESS EXT

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Self-test routine in progress 10%     12911         -
# 2  Extended offline    Completed without error       00%         5         -

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'm baffled by the current situation.. What shall I do??
Many thanks, -turgut

Last edited by tkalfaoglu; 10-17-2013 at 04:27 AM.
 
Old 10-17-2013, 11:10 AM   #2
tkalfaoglu
Member
 
Registered: Oct 2003
Location: Izmir, Turkey
Distribution: Fedora Core 10
Posts: 54

Original Poster
Rep: Reputation: 15
UPDATE: After booting from external, I did an fsck of each raid disk, /dev/md0 thru 4, and at next reboot, my CURRENT data files were gone, and the OTHER drive with older data was up!

That is, the /dev/md0-4 was using /dev/sdb only, but now it's using /dev/sda partitions only - according to /proc/mdstat

However, the data on /dev/sda partitions are all ancient -- several months old

Furthermore, /dev/sdb has no partitions now; "testdisk" is finding some; its still scanning. Really odd that fsck would do that..

Correct me if you can: If I recover those partitions using testdisk, I'll do a
dd if=/dev/sdb2 of=/dev/sda2
(for each partition)
and then I hope at next reboot, I'll have a working RAID1 again and my latest data will be available..

Last edited by tkalfaoglu; 10-17-2013 at 02:37 PM.
 
Old 10-18-2013, 03:58 AM   #3
tkalfaoglu
Member
 
Registered: Oct 2003
Location: Izmir, Turkey
Distribution: Fedora Core 10
Posts: 54

Original Poster
Rep: Reputation: 15
Thanks for the feedback from 132 people who have read my post

I have since rescued all the partitions from the more recent drive, the sdb, simply by copying the partition table from its cousin, the sda. I rebooted and mounted them, and now copying its contents to the older drive.

-turgut
 
Old 10-25-2013, 06:56 PM   #4
Rearden888
LQ Newbie
 
Registered: Jan 2010
Location: Anacortes, WA
Distribution: Crunchbang, Debian, Gentoo
Posts: 24
Blog Entries: 2

Rep: Reputation: 3
I've not done it with RAID 1, but I have a couple of RAID 5 arrays that have had drives fail. When I've been troubleshooting, you can use mdadm /dev/mdx --re-add /dev/sda to tell mdadm that the drive you're adding back in to the array was previously there. Your solution works also, though.

You might consider marking the thread solved since you posted your solution.

---------- Post added 10-25-13 at 04:56 PM ----------

I've not done it with RAID 1, but I have a couple of RAID 5 arrays that have had drives fail. When I've been troubleshooting, you can use mdadm /dev/mdx --re-add /dev/sda to tell mdadm that the drive you're adding back in to the array was previously there. Your solution works also, though.

You might consider marking the thread solved since you posted your solution.
 
  


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