topic Re: Issue on Hardware RAID in HPE ProLiant Servers (ML,DL,SL)

Issue on Hardware RAID

bchinnat — Fri, 17 Sep 2010 12:33:49 GMT

I have some queries regarding Hardware RAID.
The hardware is Proliant DL380 and OS is Redhat linux 5 update 1.
There are two disks of the size 72GB. I want to boot the server with the second disk by removing first one. when I tried Its not detecting as boot disk. By pressing F8(while booting) I can it is RAID 1 and having 2 physical device of 72 Gb and status is ok.

How to make second disk as bootable?

Thanks In Advance..

Re: Issue on Hardware RAID

wobbe — Sat, 18 Sep 2010 08:13:07 GMT

If you are using raid one on a Smart Array controller you should be able to boot from both disks. Although you will get an error/warning message during boottime and will have to press a function key to continue booting.

Re: Issue on Hardware RAID

Hakki Aydin Ucar — Sun, 19 Sep 2010 11:20:13 GMT

RAID 1 means just mirroring , in any system it must be very match with each other. and automatically must be boot with no problem as far as I know.
The very simple recommendation , power down system replace first one, and put the second one the first one's slot and power up ? is it working now ?

Re: Issue on Hardware RAID

bullz — Tue, 21 Sep 2010 09:54:16 GMT

I understand that it's a lun from a storage and it's mirrored. In such case, ur secondary disk is just for the backup may be, not as a bootdisk :( poor administration.

Check more on OS side about the boot meedia/disk etc.... probly u can compare the setup with other OS where it works.

Good luck dude

Re: Issue on Hardware RAID

gregersenj — Sun, 26 Sep 2010 14:09:23 GMT

Given that you got a Smart Array Controler.
And a healthy RAID 1.
And the Smart Array is set as boot controller.

You can power down server.
Remove any of the two disks, and it will boot on the other disk.

You will be prompted, that a disk i s missing
Prompt:
Press F1 to diable array (This will disable)
Press F2 to continue in iminent rcovery (The RAID remain active, and will start a rebuild when a disk is insertet)
If you don't press anything it will default F2 :)

There is one thing that you can't do.
That is. If you power down the server.
Remove disk 0.
Then move disk 1 into disk 0's posistion.
That will not work.

BR
/jag