CentOS - Mar 2008 - PE2950, RAID 0, failed disk

I have a Dell PowerEdge 2950 with PERC 5/i, and 6 disks.  Two disks have 
one logical volume via a hardware RAID 1 and consist of CentOS 5 64-bit; 
the remaining four comprise a logical volume via a hardware RAID 0, and 
is all user data.

One drive on the RAID 0 went bad.   I removed it while the system was on, 
tried a reboot, and the system hangs at RedHat Linux... Starting

I tried to boot from a Fedora 8 CD, which sees the boot drives fine, but 
not the RAID 0 partitions.

Visiting the PERC controller setup claims the RAID 0 volume is 
unavailable, or something similar, though it is defined, with one of the 
disks labelled as missing, since I removed it from the system.

How do I get the partitions on the RAID 0 setup back?   I have some of the 
data, but need the rest, if possible, and the remaining three disks appear 
physically healthy.   I'm also going to work with Dell for some answers, 
and I've done a lot of googling.

Thanks.

Scott

Scott R. Ehrlich wrote:
> I have a Dell PowerEdge 2950 with PERC 5/i, and 6 disks.  Two disks 
> have one logical volume via a hardware RAID 1 and consist of CentOS 5 
> 64-bit; the remaining four comprise a logical volume via a hardware 
> RAID 0, and is all user data.
>
> One drive on the RAID 0 went bad.   I removed it while the system was 
> on, tried a reboot, and the system hangs at RedHat Linux... Starting
every 4th block of your data is gone.   RAID-0 isn't actually RAID, as 
there's no Redundancy.  Instead, its AID-0.

On Thu, 2008-03-06 at 13:53 -0500, Scott R. Ehrlich
wrote:
> I have a Dell PowerEdge 2950 with PERC 5/i, and 6 disks.  Two disks have 
> one logical volume via a hardware RAID 1 and consist of CentOS 5 64-bit; 
> the remaining four comprise a logical volume via a hardware RAID 0, and 
> is all user data.
> 
> One drive on the RAID 0 went bad.   I removed it while the system was on, 
> tried a reboot, and the system hangs at RedHat Linux... Starting
> 
> I tried to boot from a Fedora 8 CD, which sees the boot drives fine, but 
> not the RAID 0 partitions.
> 
> Visiting the PERC controller setup claims the RAID 0 volume is 
> unavailable, or something similar, though it is defined, with one of the 
> disks labelled as missing, since I removed it from the system.
> 
> How do I get the partitions on the RAID 0 setup back?   I have some of the 
> data, but need the rest, if possible, and the remaining three disks appear 
> physically healthy.   I'm also going to work with Dell for some
answers,
> and I've done a lot of googling.
RAID 0 doesn't provide redundancy ... i still don't understand why you
installed it with RAID 0 ...
Recreate a new (RAID 5) drive on the raid controller, format it and
restore your last backup ...

-- 
Fabian Arrotin <fabian.arrotin at arrfab.net>
"Internet network currently down, TCP/IP packets delivered now by
UPS/Fedex ..."
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