RAID magics gone...
Hi,
I have a machine with 4 160G disks in a raid-0 configuration. Now after upgrading the hardware, all of a sudden raidstart can't find the raid-superblocks anymore. Invalid magic.
I'm suspecting that it might be that the superblock was overwritten with data or something like that. Does anybody know of a bug like this?
We're running kernel-2.4.16 with andre's IDE patches for the large disks.
I'll see if I can find the "magic" anywhere on the disk....
Roger.
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Quoted 6 lines · Rogier Wolff
Hi,
I have a machine with 4 160G disks in a raid-0 configuration. Now after upgrading the hardware, all of a sudden raidstart can't find the raid-superblocks anymore. Invalid magic.
A shot in the dark: any chance the new hardware sees a different geometry so the RAID superblock location (which is at the end of the disk) has shifted?
--
Eyal Lebedinsky ([email protected]) <http://samba.org/eyal/>
Rogier Wolff <[email protected]> :
[...]
Quoted 7 lines
I have a machine with 4 160G disks in a raid-0 configuration. Now after upgrading the hardware, all of a sudden raidstart can't find the raid-superblocks anymore. Invalid magic.
I'm suspecting that it might be that the superblock was overwritten with data or something like that. Does anybody know of a bug like this?
Cut some configuration options behind "Advanced partition selection" ?
I experienced the same symptoms 2 days ago (IDE+1 raid autodetect partition +raid1+2.4.18-pre7-"akpm"). No superblock corruption here but a side effect of a rescue installation in swap space.
Signature · 1 line
Ueimor
Quoted 7 lines · Rogier Wolff
Hi,
I have a machine with 4 160G disks in a raid-0 configuration. Now after upgrading the hardware, all of a sudden raidstart can't find the raid-superblocks anymore. Invalid magic.
Quoted 8 lines
I'm suspecting that it might be that the superblock was overwritten with data or something like that. Does anybody know of a bug like this?
We're running kernel-2.4.16 with andre's IDE patches for the large disks.
I'll see if I can find the "magic" anywhere on the disk....
Couldn't find them .
Moved the disks to the old machine, got my RAID back. But I still can't find the magic numbers for the rais-sb anywhere.
Could it be that 48bit addressing doesn't work for PIO mode? Either KERNEL bug, drive bug or by spec?
I found that the drives were horribly slow when I tried searching them. So I turned DMA on only after having failed to mount the raid, and started to "search" through the whole disk.
Can someone seek to the 8k before end of a raid-partition, and dump the remaining part of the disk, so that I can be sure to know what it looks like? That should include the raid-sb, right?
Roger.
Signature · 4 lines
** [email protected] ** http://www.BitWizard.nl/ ** +31-15-2137555 ** *-- BitWizard writes Linux device drivers for any device you may have! --* * There are old pilots, and there are bold pilots. * There are also old, bald pilots.