no file system after replacing bad RAID drive

[Gayn Winters]

> -----Original Message-----
> From: owner-freebsd-hardware at freebsd.org 
> [mailto:owner-freebsd-hardware at freebsd.org] On Behalf Of 
> Palle Girgensohn
> Sent: Tuesday, November 28, 2006 2:12 AM
> To: hardware at freebsd.org
> Subject: no file system after replacing bad RAID drive
> 
> 
> Hi!
> 
> We just got Dell to replace a bad drive in a RAID5 cluster. 
> After reboot, 
> megarc says their all online, but FreeBSD cannot find a file 
> system on the 
> logical drive. It worked before replacing (in degraded mode).
> 
> It is a Dell 2850 with a Perc4/I (really a LSILogic MegaRAID) 
> controller 
> running FreeBSD 6.0
> 
> Any ideas how to get the file system back? bsdlabel finds no 
> label, and 
> since the OS does not find the label during startup, there 
> are no devices. 
> I tried some megarc and camcontrol commands, but nothing 
> seems to help.
> 
> Any ideas appreciated. Thanks,
> Palle

I have not been able to get my PERC4 to rebuild while online.  Have you
tried stopping the boot (control M as I recall) to get into the PERC4
firmware and rebuilding the RAID from there?  My rebuild (3x150GB RAID5)
takes about 14 hours - totally offline.

-gayn

Bristol Systems Inc.
714/532-6776
www.bristolsystems.com