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aapash
n00b
Joined: 14 May 2008
Posts: 5
Location: Stockholm, Sweden
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 Posted: Wed May 14, 2008 2:07 pm Post subject: [SOLVED] Raid1 recovery restarts at >80% |
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Raid1 recovery restarts at >80%
Raid configuration:
| Code: | Server ~ # cat /proc/mdstat
Personalities : [raid0] [raid1]
md2 : active raid1 md0[2] md1[1]
601537408 blocks [2/1] [_U]
[=>...................] recovery = 9.7% (58476032/601537408) finish=147.2min speed=61448K/sec
md1 : active raid0 sdb1[0] hdi1[2] hdg1[1]
601537472 blocks 64k chunks
md0 : active raid0 sda1[3] hde1[2] hdc1[1] hda2[0]
602262912 blocks 64k chunks
unused devices: <none>
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Original system location is md0 (raid0). md1 has been added as yet another raid0.
md2 (raid0+1) has been created as:
| Code: | | Server ~ # mdadm --create /dev/md2 --level=1 --raid-devices=2 missing /dev/md1 |
Data have been copied to md2 (degraded mode). System starts and works just fine from md2.
Now it's time to put missed raid0 (md0) in system:
| Code: | | Server ~ # sfdisk -d /dev/md1 | sfdisk /dev/md0 |
Just to check:
| Code: | Server ~ # sfdisk -d /dev/md1
# partition table of /dev/md1
unit: sectors
/dev/md1p1 : start= 4, size=1203074940, Id=fd
/dev/md1p2 : start= 0, size= 0, Id= 0
/dev/md1p3 : start= 0, size= 0, Id= 0
/dev/md1p4 : start= 0, size= 0, Id= 0
Server ~ # sfdisk -d /dev/md0
# partition table of /dev/md0
unit: sectors
/dev/md0p1 : start= 4, size=1203074940, Id=fd
/dev/md0p2 : start= 0, size= 0, Id= 0
/dev/md0p3 : start= 0, size= 0, Id= 0
/dev/md0p4 : start= 0, size= 0, Id= 0
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Missing device is added:
| Code: | | Server ~ # mdadm /dev/md2 -a /dev/md0 |
Recovery process is started, but never comes to the end. At the end (>80%is done) it restarts from the beginning.
Can't understand what's going on. Has tried:
| Code: | Server ~ # mdadm /dev/md2 -f /dev/md0
Server ~ # mdadm /dev/md2 -r /dev/md0
Server ~ # sfdisk -d /dev/md1 | sfdisk /dev/md0
Server ~ # mdadm /dev/md2 -a /dev/md0
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The same result... 
Any ideas?
Last edited by aapash on Fri May 16, 2008 7:10 pm; edited 1 time in total |
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manaka
Apprentice
Joined: 23 Jul 2007
Posts: 158
Location: Oviedo, Spain
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| Posted: Wed May 14, 2008 3:04 pm Post subject: |
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You are using a quite weird setup... raid10 md personality would generally be preferred over the raid0 and raid1 combo.
Seems you are using partitionable raid devices... I think you should setup the partitions on the top level array, not in the lower ones... Additionally, when creating a partitionable array, the auto=mdp option should be specified... (Don't know this from sure... Have never tried setting them since I prefer LVM on top of MD  )...
_________________
Javier Miqueleiz
"Listen to your heart. It knows all things, because it came from the Soul of the World, and it will one day return there." |
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aapash
n00b
Joined: 14 May 2008
Posts: 5
Location: Stockholm, Sweden
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| Posted: Wed May 14, 2008 4:59 pm Post subject: |
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| Thanks! |
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aapash
n00b
Joined: 14 May 2008
Posts: 5
Location: Stockholm, Sweden
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| Posted: Fri May 16, 2008 7:09 pm Post subject: |
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| It were a few badblocks at the end of /dev/hdg included in /dev/md1. |
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manaka
Apprentice
Joined: 23 Jul 2007
Posts: 158
Location: Oviedo, Spain
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| Posted: Sat May 17, 2008 2:25 am Post subject: |
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Try getting the SMART information from that disc with smartctl. As today's discs do bad block relocation, they only report a read error to the OS when they are about to fail.
_________________
Javier Miqueleiz
"Listen to your heart. It knows all things, because it came from the Soul of the World, and it will one day return there." |
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aapash
n00b
Joined: 14 May 2008
Posts: 5
Location: Stockholm, Sweden
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| Posted: Sun May 18, 2008 5:40 pm Post subject: |
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I've just followed detailed instructions of
http://smartmontools.sourceforge.net/BadBlockHowTo.txt
Now it looks good:
| Code: | Server ~ # smartctl -l selftest /dev/hdg
smartctl version 5.37 [i686-pc-linux-gnu] Copyright (C) 2002-6 Bruce Allen
Home page is 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 Short offline Completed without error 00% 40133 -
# 2 Extended offline Completed without error 00% 40121 -
# 3 Short offline Completed without error 00% 40117 -
# 4 Extended offline Completed: read failure 10% 40114 358400973
# 5 Short offline Completed: read failure 60% 40112 358400973
# 6 Short offline Completed: read failure 60% 40112 358400973
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