[Techtalk] raid array problems

[Maria McKinley]

Cynthia Kiser wrote:
> Quoting Maria McKinley <maria at shadlen.org>:
> 
>>when I rebooted we could not mount the raid array
> 
> 
> Software or hardware RAID? Have a look at 'dmesg' output for the
> machine you rebooted. 
> 
> 
>>I did not set up the raid array, so my knowledge of it is limited.
> 
> 
> I only know specifics about 3ware hardware RAID cards, but most RAID
> setups come with monitoring software that would warn you if there are
> problems. See if your boot messages give you enough information to
> tell what kind of RAID you have, then look at the manufacturer's or
> software vendor's site for information about monitoring.
> 
> If you have hardware RAID, there is usually a step in the boot process
> where you can get into the BIOS level configuration for the RAID
> card. If you are willing to reboot again, watch for that screen and
> follow the directions - usually something like "hit F4 to
> configure". The screens at that point will tell you about the
> availability of the disks in the array.
> 

It is a hardware array. When I boot up I can go into the adaptec raid 
configuration utility, and it gives me an option to use the disk 
utility. I am given one cnannel to select #0. Should I try it? There
are also options to use a SCSISelect Utility and an Array Configuration 
Utility.

When I continue with boot, it tells me
SCSI disk error : host 1 channel 0 id 0 lun 0 return code = 1
I/O error: dev 08:00, sector 6
read_callback: read failed, status = 5

It repeats this same error, with the only thing changing the sector 
(sector 6,0,2,4 all have error)

Then it says
unable to read partition table
fsck.ext3: No such device or address while trying to open /dev/sda1
Possibly non-existent or swap device?
/dev/hdc: clean, 181981/7340032 files, 11664506/14653918 blocks

fsck failed. Please repair manually.

I'm not sure that all of this is to do with the raid array, but it seems 
likely. It then gives me an oportunity to do maintenance or CONTROL-D to 
continue. Then computer boots up normally, except raid array is not mounted.

-maria