[ILUG] Linux RAID introduction

[John P. Looney]

On Tue, Apr 11, 2000 at 09:55:12AM +0100, Gary Mc Closkey mentioned:
> He's talking about software RAID there, not hardware btw.  Some claim
> that in certain circumstances that software RAID is better than
> hardware, though YMMV.

 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
1+0'd. 

 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 ?

Kate

-- 
"The fool must be beaten with a stick, for an intelligent person 
the merest hint is sufficient"                -- Zen Master Greg