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Gleemonex
n00b
Joined: 28 Dec 2005
Posts: 10
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 Posted: Mon Feb 06, 2006 9:35 pm Post subject: RAID and LBA |
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I think I may have lost my RAID5 array for good, but this is a last-ditch effort to see what I can salvage.
Situation
I have a RAID5 array that suffered a power failure. The disks themselves are fine, but when I try to run raidstart, the RAID refuses to start because 2 of the 4 drives are marked as corrupted.
Hardware and Software
Celeron 633 with one 20GB Quantum boot drive on on-board IDE controller.
Running Gentoo 2005.1 fully updated as of 2006-02-03
4 x 80GB Matrox ATA66 drives in Promise FastTrak66 2-channel RAID0/1 controller, acting as IDE controller for use in software RAID5
Configuration Files and Logs
Here is my raidtab:
| Code: |
raiddev /dev/md0
raid-level 5
nr-raid-disks 4
nr-spare-disks 0
persistent-superblock 1
parity-algorithm left-symmetric
chunk-size 128
device /dev/hde1
raid-disk 0
device /dev/hdf1
raid-disk 1
device /dev/hdg1
raid-disk 2
device /dev/hdh1
raid-disk 3
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Upon closer inspection, LBA seems to have failed on disks 2 and 3 (which are the 'faulty' ones). Here is the fdisk information for each drive:
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Disk /dev/hde: 80.0 GB, 80054059008 bytes
255 heads, 63 sectors/track, 9732 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hde1 1 9732 78172258+ fd Linux raid autodetect
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| Code: |
Disk /dev/hdf: 80.0 GB, 80054059008 bytes
255 heads, 63 sectors/track, 9732 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hdf1 1 9732 78172258+ fd Linux raid autodetect
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| Code: |
Disk /dev/hdg: 80.0 GB, 80054059008 bytes
16 heads, 63 sectors/track, 155114 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Device Boot Start End Blocks Id System
/dev/hdg1 1 155114 78177424+ fd Linux raid autodetect
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| Code: |
Disk /dev/hdh: 81.9 GB, 81964302336 bytes
16 heads, 63 sectors/track, 158816 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Disk /dev/hdh doesn't contain a valid partition table
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I double-checked the Promise FastTrak66 BIOS to see if the hard drives # 2 and 3 really were fried, and it reads all the drives thus:
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FastTrak66 (tm) BIOS Version 1.30 (Build 12)
(c) 1995-2000 Promise Technology, Inc. All rights reserved.
ID MODE SIZE TRACK-MAPPING STATUS
==============================================================
1 * 1+0 Span 76345M 9732/255/63 Functional
2 1+0 Span 76345M 9732/255/63 Functional
3 1+0 Span 76345M 9732/255/63 Functional
Press <Ctrl-F> to enter FasstBuild (tm) Utility.
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So LBA seems to be working on the Promise BIOS, but not in Gentoo proper.
Hypothesis
Is there a way to force LBA recognition, just so I can try to mount my poor RAID in degraded mode and offload my precious precious data?
Any help would be appreciated.
-Glee
_________________
The stupider someone thinks you are, the more surprised they'll be when you kill them. |
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Gleemonex
n00b
Joined: 28 Dec 2005
Posts: 10
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| Posted: Tue Feb 07, 2006 10:29 pm Post subject: |
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Nobody? Nobody at all? Surely it can't be that tough to force LBA on a drive when the hardware itself is fine?
-Glee
_________________
The stupider someone thinks you are, the more surprised they'll be when you kill them. |
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