[ILUG] Linux RAID introduction
wesley at blackstar.co.uk
Wed Apr 12 09:33:20 IST 2000
On Tue, Apr 11, 2000 at 10:37:19AM +0100, John P. Looney wrote:
> Speaking of, anyone added disks to a Dell box, that has a hardware raid
> card ? One of our servers here had a pair of 9GB disks, working away Raid
> Then I added two more, initialised them in the BIOS (took poxy ages), and
> then when I booted the machine up, it didn't see a "/dev/sdb" like I'd
> expected. Any ideas what else I've to do ? The relevant dmesg output is:
> scsi2 : Found a MegaRAID controller at 0xe490, IRQ: 18
> megaraid: [Uc77:1.47] detected 2 logical drives
> scsi2 : AMI MegaRAID Uc77 254 commands 16 targs 2 chans 8 luns
> scsi : 3 hosts.
> scsi2: scanning channel 1 for devices.
> scsi2: scanning channel 2 for devices.
> scsi2: scanning virtual channel for logical drives.
> Vendor: MegaRAID Model: LD0 RAID1 8568R Rev: Uc77
> Type: Direct-Access ANSI SCSI revision: 02
> Detected scsi disk sda at scsi2, channel 2, id 0, lun 0
> So, it sees 2 logical drives, but only detects one ?
I think you have to turn on "probe all LUNs" with the megaraid. It
presents all its hard drives as id0, lun $n$.
Just a thought,
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