Re: raid5 recovery fails

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On Tuesday November 15, raziebe@xxxxxxxxx wrote:
> > mdadm --add /dev/md0 /dev/sda2..
> yes , i am using raidstart for this.  it should be the same.

No, it shouldn't.
raidstart is broken by design and cannot work reliable.  It is one of
the main reasons that I wrote mdadm.

raidstart trusts the device numbers (major and minor) that are stored
in the superblock.  If you pull a drive out these numbers change and
raidstart fails miserably.

# rm -f /usr/sbin/raidstart

is probably a good idea.

> I am handling a big cluster with supermicro machines,each machine has its
> own 4 sata disks.I am using 2.6.6 kernel.
> 
> Did you ever pulled out a disk from raid5 while the machine was
> running ?

Yes, several times.


NeilBrown
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