On 08/07/10 23:42, James Courtier-Dutton wrote:
> On 8 July 2010 22:10, John Cooper <lug@???> wrote:
>> My normal backup routine is to tar up my home directory files daily and
>> then every month or so do a full disc clone using DD
>>
>> dd if=/dev/sda of=/dev/sdb bs=32M
>>
>> This has worked for years but now fails to copy all files on Fedora 13.
>> Some directories like /sys have permissions ???? . I also tried
>> clonezilla using partclone which took 24 hours and then crashed. I think
>> this is the first ext4 backup I've done. The only other change is my
>> removable caddies which are now cheaper ones.
>>
>> Any ideas?
>>
> Maybe the hard disk is failing.
> What does "smartctl -a /dev/sda" output in the reallocated sectors row?
>
> Kind Regards
>
> James
>
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> Please post to: Hampshire@???
> Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire
> LUG URL: http://www.hantslug.org.uk
> --------------------------------------------------------------
>
James, was nothing to do with ext4, Extended offline test showed
"Completed: read failure" and "Current_Pending_Sector" was 3.
Configuring smartd service to run automatically it also confirmed it
found 3 unreadable sectors. So I'm rebuilding a new drive and using g4l
to backup/restore that partition.
Thanks for pointing me in the right direction.
Full howto
http://smartmontools.sourceforge.net/badblockhowto.html
Run tests
sudo smartctl -t short /dev/sda
sudo smartctl -t long /dev/sda
sudo smartctl -t conveyance /dev/sda
Once all finished
sudo smartctl -l selftest /dev/sda
smartctl 5.39.1 2010-01-28 r3054 [i386-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen,
http://smartmontools.sourceforge.net
=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining
LifeTime(hours) LBA_of_first_error
# 1 Conveyance offline Completed without error 00% 3182
-
# 2 Extended offline Completed: read failure 50% 3175
572267884
# 3 Short offline Completed without error 00% 3174
-
sudo smartctl -A /dev/sda
smartctl 5.39.1 2010-01-28 r3054 [i386-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen,
http://smartmontools.sourceforge.net
=== START OF READ SMART DATA SECTION ===
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 141 140 021 Pre-fail Always
- 3925
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always
- 36
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 096 096 000 Old_age Always
- 3196
10 Spin_Retry_Count 0x0032 100 253 000 Old_age Always
- 0
11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always
- 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always
- 34
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always
- 19
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always
- 16
194 Temperature_Celsius 0x0022 102 095 000 Old_age Always
- 41
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always
- 0
197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always
- 3
198 Offline_Uncorrectable 0x0030 200 200 000 Old_age
Offline - 2
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always
- 1
200 Multi_Zone_Error_Rate 0x0008 200 200 000 Old_age
Offline - 6
Note to fix it you will need to use the LVM path if it is an LVM partition
sudo fdisk -lu /dev/sda
/dev/sda1 * 63 401624 200781 83 Linux
/dev/sda2 401625 976768064 488183220 8e Linux LVM
My fault is at 572267884 so in /dev/sda2, LVM partition.
sudo tune2fs -l /dev/mapper/VolGroup00-LogVol00 | grep Block
Block count: 121004032
Block size: 4096
Blocks per group: 32768
So 4096 block count
b = (int)((L-S)*512/B)
where:
b = File System block number
B = File system block size in bytes
L = LBA of bad sector
S = Starting sector of partition as shown by fdisk -lu
and (int) denotes the integer part.
L=572267884, S=401625 B=4096
b=(572267884-401625)x512/4096=71483282
I ran debug on the mounted and running system and can take a while to
run each command (500GB disc).
sudo debugfs
debugfs 1.41.10 (10-Feb-2009)
debugfs: open /dev/mapper/VolGroup00-LogVol00
debugfs: testb 71483282
Block 71483282 marked in use
debugfs: icheck 71483282
Block Inode number
71483282 17867467
debugfs: ncheck 17867467
Inode Pathname
17867467 /home/user/.cxoffice/Other
Application/drive_c/windows/system32/winecfg.exe
sudo dd if=/dev/zero of=/dev/sda2 bs=4096 count=1 seek=71483282
1+0 records in
1+0 records out
4096 bytes (4.1 kB) copied, 0.00148771 s, 2.8 MB/s
ls -altr /home/user/.cxoffice/Other
Application/drive_c/windows/system32/winecfg.exe
ls: cannot access /home/user/.cxoffice/Other: No such file or directory
Re-check
sudo smartctl -t long /dev/sda
90 minutes later :-
sudo smartctl -l selftest /dev/sda
smartctl 5.39.1 2010-01-28 r3054 [i386-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen,
http://smartmontools.sourceforge.net
=== START OF READ SMART DATA SECTION ===
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 50% 3198
572267890
# 2 Conveyance offline Completed without error 00% 3182
-
# 3 Extended offline Completed: read failure 50% 3175
572267884
# 4 Short offline Completed without error 00% 3174
-
So will repeat process to fix 572267884.
John.
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