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#1 2015-04-11 16:48:16

wujo11
Member
Registered: 2008-09-16
Posts: 35

Lost ability to write anything on HDD

Hello!

Something happened when I was copying files from Vol_1 to Vol_2 and and I cannot write to a second HDD no more. After I used dmesg command it is explained:

Code:

sdb: Current: sense key=0x3
    ASC=0x0 ASCQ=0x0
Info fld=0xa2fce10
end_request: I/O error, dev sdb, sector 170905104
EXT3-fs error (device sdb2): read_block_bitmap: Cannot read block bitmap - block_group = 644, block_bitmap = 21102592
Aborting journal on device sdb2.
ext3_abort called.
EXT3-fs error (device sdb2): ext3_journal_start_sb: Detected aborted journal
Remounting filesystem read-only
EXT3-fs error (device sdb2) in ext3_prepare_write: IO failure
__journal_remove_journal_head: freeing b_committed_data
__journal_remove_journal_head: freeing b_committed_data
__journal_remove_journal_head: freeing b_committed_data
__journal_remove_journal_head: freeing b_committed_data
__journal_remove_journal_head: freeing b_committed_data
__journal_remove_journal_head: freeing b_committed_data

Can someone explain me what happened to Vol_2 (sdb) and how to fix it to make it read/write again?

Last edited by wujo11 (2015-04-11 16:48:44)

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#2 2015-04-13 11:57:57

Mijzelf
Member / Developer
Registered: 2008-07-05
Posts: 709

Re: Lost ability to write anything on HDD

end_request: I/O error, dev sdb, sector 170905104

That's almost for sure a hardware error. Have a look at the smart data of that disk.

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#3 2015-04-13 14:44:52

wujo11
Member
Registered: 2008-09-16
Posts: 35

Re: Lost ability to write anything on HDD

Ok, this is log from executing smartctl -a -i -d marvell /dev/sdb commmand

Code:

smartctl 5.39.1 2010-01-28 r3054 [arm-unknown-linux-uclibc] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Device Model:     SAMSUNG HD204UI
Serial Number:    S2H7J1CB114758
Firmware Version: 1AQ10001
User Capacity:    2,000,398,934,016 bytes
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   8
ATA Standard is:  ATA-8-ACS revision 6
Local Time is:    Mon Apr 13 12:33:10 2015 GMT
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:          (20100) 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.
                    General Purpose Logging supported.
Short self-test routine 
recommended polling time:      (   2) minutes.
Extended self-test routine
recommended polling time:      ( 255) minutes.
SCT capabilities:            (0x003f)    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   100   100   051    Pre-fail  Always       -       283
  2 Throughput_Performance  0x0026   252   252   000    Old_age   Always       -       0
  3 Spin_Up_Time            0x0023   067   067   025    Pre-fail  Always       -       10226
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       220
  5 Reallocated_Sector_Ct   0x0033   252   252   010    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x002e   252   252   051    Old_age   Always       -       0
  8 Seek_Time_Performance   0x0024   252   252   015    Old_age   Offline      -       0
  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       135
 10 Spin_Retry_Count        0x0032   252   252   051    Old_age   Always       -       0
 11 Calibration_Retry_Count 0x0032   252   252   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       127
181 Program_Fail_Cnt_Total  0x0022   100   100   000    Old_age   Always       -       1465294
191 G-Sense_Error_Rate      0x0022   100   100   000    Old_age   Always       -       2
192 Power-Off_Retract_Count 0x0022   252   252   000    Old_age   Always       -       0
194 Temperature_Celsius     0x0002   064   062   000    Old_age   Always       -       33 (Lifetime Min/Max 17/40)
195 Hardware_ECC_Recovered  0x003a   100   100   000    Old_age   Always       -       0
196 Reallocated_Event_Count 0x0032   252   252   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   100   100   000    Old_age   Always       -       15
198 Offline_Uncorrectable   0x0030   252   252   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0036   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x002a   100   100   000    Old_age   Always       -       0
223 Load_Retry_Count        0x0032   252   252   000    Old_age   Always       -       0
225 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       236

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
No self-tests have been logged.  [To run self-tests, use: smartctl -t]


Note: selective self-test log revision number (0) not 1 implies that no selective self-test has ever been run
SMART Selective self-test log data structure revision number 0
Note: revision number not 1 implies that no selective self-test has ever been run
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Completed [00% left] (0-65535)
    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.

It seems to be OK.

I investigated problem further and found out tha the journal is probably corrupted. It was suggested that I should: unmount drive, remove journal from filesystem, use e2fsck to remove journal and scan drive, lastly recreate journal using tune2fs. That's the tricky part becouse the drive is flagged as needs_revocery and the journal could'nt be deleted (even when I force delete in e2fck it won't do it). I try to change flag using debugfs but the program fails. I'm stuck.

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#4 2015-06-17 19:32:07

wujo11
Member
Registered: 2008-09-16
Posts: 35

Re: Lost ability to write anything on HDD

How to mount (or remount) disk as ext2 after NAS started, or how to configure to mount disk as ext2 when device is booting. How the DNS-323 manage that. I have Funplug 0.5 installed with SSH access but I don't know where to look for config files.

I know only configure by fstab but my /etc/fstab looks like this:

Code:

proc            /proc           proc    defaults        0       0
/dev/ram0       /               minix   defaults        1       1
/dev/mtdblock0  /sys/mtd1       minix   defaults        0       0
/image.cfs      /sys/crfs       squashfs loop           0       0

so I think is not done by that in that case.

The disk I'm talking about is Vol_2 so not funplug or other process is accessing it after boot (except samba).

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#5 2015-06-18 17:53:58

Mijzelf
Member / Developer
Registered: 2008-07-05
Posts: 709

Re: Lost ability to write anything on HDD

If you can unmount it, I guess you can remount it explicitely specifying the file system

Code:

mount -t ext2 <device> <mountpoint>

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