Linux + second disk array

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Tomi Lehtinen
Occasional Contributor

Linux + second disk array

Hi all,

Redhat 6.1 (Sap certified edition)
Kernel 2.2.12-45SAPsmp
HP Netserver LC2000 PIII-800Mhz
6 x 18Gb Ultra3 SCSI disk
HP NetRAID-1Si Disk Array Controller

I have two disk arrays:
Array1: 2 x 18Gb RAID-1
Array2: 4 x 18Gb RAID-5

When installing RH (graphical mode), I can see only disks on Array1 (/dev/sda). I can make partitions and run RH fine, but I miss all disks on Array2 (dev/sdb).

Any ideas how I could take all missing disks in use?

(I have configured and initialized both arrays & disks with HP Navigator program before installing RH. No problems there).

Thanks in advance!

Bregs, Tomi Lehtinen
Xavier Gutierrez
Frequent Advisor

Re: Linux + second disk array

Are both LUNs (arrays) properly configured within NetRAID Ctrl+M menu?
Live fast, die young!
Honored Contributor

Re: Linux + second disk array

It seems your megaraid driver is older version.
I recommend you to use newer megaraid driver which can be download from

Or just try following procedues.

# cat /proc/scsi/scsi
Host: Scsi 0 channel: 01 Id: 00 Lun: 00

This is first LUN (sda) information.
It is 0 1 0 0.
So what you need is 2nd LUN information.
It shoud be 0 1 0 1.

echo "scsi add-single-device 0 1 0 1" > /proc/scsi/scsi

Now your kernel can find 2nd lun.
Put the command into rc.sysinit or rc.local.

masanari iida