[SATLUG] 1st Q? - RAID5 quit working - Cables swapped & retest results

David Labens adlabens at swbell.net
Wed Aug 19 15:09:27 CDT 2009


I've removed & reattached the cables, even replacing the data cable on /dev/sdc, and I've retested.  Below are the tests & results, but I'll add a quick note, first.  I ran the "smartctl -a /dev/sdc" command & it said no errors, and that there had been no previous testing on the system.  THEN, I ran the long test.  I IMMEDIATELY ran the "smartctl -a /dev/sdc" & it gave me the results below (& I did verify that the s/n of the drive matched the s/n on the /dev/sdc & /dev/sdc1 test results).  So, it looked like it failed almost immediately, unlike the previous tests on Monday.  Here are the commands & results ...

root at RCH-SERVER:/home/admiral# mdadm --examine /dev/sdc1

/dev/sdc1:
          Magic : a92b4efc
        Version : 1.0
    Feature Map : 0x1
     Array UUID : 13782a18:85c82f51:e999ccd0:c2ca0614
           Name : 0
  Creation Time : Sat Jan 10 13:03:52 2009
     Raid Level : raid5
   Raid Devices : 4

 Avail Dev Size : 488391728 (232.88 GiB 250.06 GB)
     Array Size : 1465175040 (698.65 GiB 750.17 GB)
  Used Dev Size : 488391680 (232.88 GiB 250.06 GB)
   Super Offset : 488391984 sectors
          State : clean
    Device UUID : 16caaeab:d141a887:5e8aa2c7:9f856976

Internal Bitmap : -234 sectors from superblock
    Update Time : Sat Aug  8 19:02:59 2009
       Checksum : 53f6ee4e - correct
         Events : 2978

         Layout : left-asymmetric
     Chunk Size : 128K

    Array Slot : 4 (0, 1, failed, failed, 3)
   Array State : uu_U 2 failed


root at RCH-SERVER:/home/admiral#   smartctl --test=long /dev/sdc

smartctl version 5.38 [x86_64-unknown-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF OFFLINE IMMEDIATE AND SELF-TEST SECTION ===
Sending command: "Execute SMART Extended self-test routine immediately in off-line mode".
Drive command "Execute SMART Extended self-test routine immediately in off-line mode" successful.
Testing has begun.
Please wait 66 minutes for test to complete.
Test will complete after Wed Aug 19 16:01:43 2009

Use smartctl -X to abort test.



root at RCH-SERVER:/home/admiral# smartctl -a /dev/sdc

smartctl version 5.38 [x86_64-unknown-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Second Generation Serial ATA family
Device Model:     WDC WD2500AAKS-00B3A0
Serial Number:    WD-WMAT15923873
Firmware Version: 01.03A01
User Capacity:    250,059,350,016 bytes
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   8
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Wed Aug 19 14:55:51 2009 CDT
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:  (0x82) Offline data collection activity
                                        was completed without error.
                                        Auto Offline Data Collection: Enabled.
Self-test execution status:      ( 121) The previous self-test completed having
                                        the read element of the test failed.
Total time to complete Offline
data collection:                 (5400) 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:        (  66) minutes.
Conveyance self-test routine
recommended polling time:        (   5) minutes.
SCT capabilities:              (0x303f) 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   156   153   021    Pre-fail  Always       -       3175
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       202
  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   092   092   000    Old_age   Always       -       5883
 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       -       200
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       97
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       202
194 Temperature_Celsius     0x0022   108   095   000    Old_age   Always       -       35
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   188   188   000    Old_age   Always       -       519
198 Offline_Uncorrectable   0x0030   189   189   000    Old_age   Offline      -       457
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   192   192   000    Old_age   Offline      -       808

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%      5883         16689727
# 2  Extended offline    Completed: read failure       90%      5882         16689727
# 3  Extended offline    Completed: read failure       90%      5843         16689727
# 4  Short offline       Completed: read failure       90%      5829         16689727

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.

UPS is to deliver the new replacement drive tomorrow (Thursday).  From what I can figure, I've got 4 options:
Removed the damaged /dev/sdc drive and have the system try to rebuild the array data on 3 drives instead of 4,Replace the damaged /dev/sdc drive and have the system try to rebuild the array data on all 4 drives,Copy the data (if it can be read, but test results indicate it's not reading but 90% of the data, if I read that correctly) from the damaged /dev/sdc drive and put it on the new drive that is being delivered, and then have the system try to re-sync the array.Copy the data off EACH of the 4 drives onto different partitions on the 1 tb drive that is in my WinXP box, and then have the Linux box try to re-sync the data to the array after replacing the damaged /dev/sdc drive.I'm THINKING that Option 2 might be the best, but it's based upon gut instincts and not upon a valid thought process.

I must admit that I have enjoyed taking most of the day off from this.  Today is my Saturday (tho it's usually on Thursdays), so I'm at the house today.

THANK Y'ALL!!!

David Labens

San Antonio, TX



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