* RAID1 degradation failure.. (2.4.17)
@ 2002-04-23 12:11 Matti Aarnio
2002-04-23 12:39 ` Matti Aarnio
0 siblings, 1 reply; 2+ messages in thread
From: Matti Aarnio @ 2002-04-23 12:11 UTC (permalink / raw)
To: linux-raid
I have had a machine to go into degraded mode from whence
it does recover automatically at next power restart, but
the thing recovers wrong disk, e.g. leaps back in time!
(The disk is failing by 'Failure prediction threshold exceeded',
and gets back online at next powerup..)
Apparently when a disk fails from under RAID1, the disks
that are left into running the set are not marked with
a NEW serial number in superblock so that auto-recovery
won't pick obsolete data in case such becomes available.
/Matti Aarnio
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: RAID1 degradation failure.. (2.4.17)
2002-04-23 12:11 RAID1 degradation failure.. (2.4.17) Matti Aarnio
@ 2002-04-23 12:39 ` Matti Aarnio
0 siblings, 0 replies; 2+ messages in thread
From: Matti Aarnio @ 2002-04-23 12:39 UTC (permalink / raw)
To: linux-raid
On Tue, Apr 23, 2002 at 03:11:13PM +0300, Matti Aarnio wrote:
> I have had a machine to go into degraded mode from whence
> it does recover automatically at next power restart, but
> the thing recovers wrong disk, e.g. leaps back in time!
...
> Apparently when a disk fails from under RAID1, the disks
> that are left into running the set are not marked with
> a NEW serial number in superblock so that auto-recovery
> won't pick obsolete data in case such becomes available.
Comparing the lattest 2.4.19-pre code to my running one,
it becomes clear that at 2.4.17 there is (was) missing
a superblock update call.
/Matti Aarnio
^ permalink raw reply [flat|nested] 2+ messages in thread
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