topic Re: Boot disk in Operating System - HP-UX

Boot disk

Chandrasekar_5 — Mon, 06 Nov 2006 15:08:32 GMT

Hello

I know We can identify the disk using ioscan -func disk , How to identify new disk added .

If its is mirred how to check which is primary & seconday .

If primary fails how to boot from alternate ,after primary recoverd how to change it.

Re: Boot disk

Rick Garland — Mon, 06 Nov 2006 15:17:49 GMT

The 'lnlnboot -v' command will provide most of the info you seek.

Re: Boot disk

Torsten. — Mon, 06 Nov 2006 15:32:47 GMT

Hi,

"I know We can identify the disk using ioscan -func disk , How to identify new disk added."

If you run "ioscan -fn" after you installed a new disk online, you will see a disk entry without device files. This is your new disk.
You should create device files at this point using insf -H ... (see man insf).

For question regarding disk replacement see

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

Re: Boot disk

Vasu Viswanadha — Tue, 07 Nov 2006 00:20:18 GMT

Hi,

To boot off an alternate disk, from BCH / PDC, use " bo " . If the disk is already designated as alternate boot disk, just a " bo alt" will do.

Once the primary disk is recovered / replaced, use 'setboot' to redefine the Primary boot path.

BR

Vasu

Re: Boot disk

John Guster — Tue, 07 Nov 2006 16:36:35 GMT

"If its is mirred how to check which is primary & seconday ."
vgdisplay -v vgname===tells if Lvols are mirrored
lvdisplay -v /dev/vgname/lvol1===tells mirror status. Normally 1st column is pri, 2nd is alt. In fact no difference between pri or alt.
We only define primary boot disk, alternate boot disk. The primary boot disk is defined in several places: /stand/bootconf, setboot, lvlnboot -v vg00 if all configured correctly.