Re: [gentoo-server] Can't mount root device (PERC 5/i)

[Christian Affolter]

>> Hmm, are you sure that your RAID has been recognized correctly? In
>> case you don't have another RAID-set or a standalone disk/CD Rom, your
>> RAID-set should be accessible as /dev/sda. So what's behind /dev/sda
>> in your case?
> No, I'm not. But I cannot access /dev/sda.
>  From a terminal (LiveCD booted):
> # fdisk /dev/sda
> Unable to open /dev/sda
Can you provide the SCSI/RAID related dmesg output from the live-CD?
Do you have a SCSI-CD Rom or an IDE/(S)ATA one?


> I may access /dev/sdb though (that's why the I installed Gentoo on sdb).
>
>> So, to summarize: Check that your RAID set has been recognized
>> properly before installing with the live-CD. Investigate why you only
>> have one SCSI device in contrast to two on the live CD (missing SCSI
>> CD-ROM support?).
>
> I'm not sure how to do that. I'm not even sure if /dev/sdb is the actual
> RAID or just one of the drives? But when I come to think about it...
> when I try to boot the system, the Dell server actually boots from the
> logical drive and it do find the kernel, hence /dev/sdb is infact the
> RAID, right?
> I also removed one of the drives, tried to boot (it finds the kernel),
> then I removed the other drive and rebooted and it still finds the kernel).
Ok, I would also assume that your mirroring RAID-set is working then ;)

>  > Also, I doubt if this is necessary with a hardware RAID controller,
>  > but perhaps emerge'ing device-mapper is necessary.   Perhaps also
>  > mdadm too, but I'm even more doubtful about that one.
>
> I can't see how this could make any difference when I can't even mount
> the root device? Anyway, I'm desperate and will try this as soon as I can.
No, those utilities won't be necessary as you're running a hardware 
RAID, their supposed to create/manage software RAIDs.

Have you ever tried to use /dev/sda in your grub config and fstab (as 
your kernel recognizes an sda SCSI disk) ?


regards
Chris

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