topic Re: replace root mirror drive in Operating System - HP-UX

replace root mirror drive

Jerry_109 — Tue, 17 Jan 2006 13:46:06 GMT

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#B.11.11 U 9000/800/N4000-44
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Hello All,

I found some instructions for replacing a bad "root mirror" (c2t6d0) internal drive. Does this look correct? Is there a vgsync missing ?

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After the disk has been replaced boot into LVM Maintenance Mode:

reboot
interrupt when "10 sec is allowed"
bo pri isl
interact with isl "y"

ISL> hpux -lm

# vgcfgrestore -n vg00 /dev/rdsk/c2t6d0

# vgchange -a y vg00

# mkboot -l /dev/rdsk/c2t6d0
# mkboot -a "hpux -lq" /dev/rdsk/c2t6d0

# lvlnboot -r /dev/vg00/lvol3 /dev/vg00
# lvlnboot -b /dev/vg00/lvol1 /dev/vg00
# lvlnboot -s /dev/vg00/lvol2 /dev/vg00
# lvlnboot -d /dev/vg00/lvol2 /dev/vg00
# lvlnboot -R
# lvlnboot -v

# reboot

# lvdisplay -v /dev/vg00/[lvols]

and finally by

# vgdisplay -v vg00

Re: replace root mirror drive

Pete Randall — Tue, 17 Jan 2006 13:49:18 GMT

Jerry,

Check this doc:

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

Pete

Re: replace root mirror drive

Geoff Wild — Tue, 17 Jan 2006 14:15:41 GMT

Shouldn't have to go into lvm maintenance mode...

After failed disk has been replaced by HP (assuming the disk is c2t6d0):

vgcfgrestore -n /dev/vg00 /dev/rdsk/c2t6d0

mkboot /dev/rdsk/c2t6d0

mkboot -a "hpux -lq (;0) /stand/vmunix" /dev/rdsk/c2t6d0

vgchange -a y /dev/vg00

lvlnboot -Rv /dev/vg00

vgsync /dev/vg00

Rgds...Geoff

Re: replace root mirror drive

Raj D. — Tue, 17 Jan 2006 17:28:54 GMT

Hi Jerry ,

1. Shutdown the server , replace the faulty disk.
2. Boot normally.
3. Identify the new disk , with ioscan.
4. # vgcfgrestore -n /dev/vg00 /dev/rdsk/c2t6d0

5. # vgchange -a y /dev/vg00
6. # mkboot -a /dev/rdsk/c2t6d0

7. # mkboot -a "hpux -lq (;0) /stand/vmunix" /dev/rdsk/c2t6d0

8. # lvlnboot -R /dev/vg00
9. # lvlnboot -v /dev/vg00 [ Verify ]
10. # vgsync /dev/vg00

[ Wait till synchronizaion completes. ]

11. # setboot
[ check , the pri and alt path. ]

12. You can reboot and check .

Cheers,
Raj.

Re: replace root mirror drive

Raj D. — Tue, 17 Jan 2006 17:31:00 GMT

Jerry (again),

Also to check , from which disk the system is booted from , use this command,

# echo "boot_string/s" | adb /stand/vmunix /dev/kmem

Cheers,
Raj.

Re: replace root mirror drive

Shameer.V.A — Tue, 17 Jan 2006 22:35:51 GMT

Hi Jerry,

The steps are as below,

ISL> hpux -lq
# pvcreate -f -B /dev/rdsk/cXtXd0
pvcreate: The physical volume "/dev/dsk/c4t6d0" is already recorded in
the "/etc/lvmtab" file.

# vgcfgrestore -n /dev/vg00 /dev/rdsk/cXtXd0
vgcfgrestore: Couldn't query physical volume "/dev/dsk/c4t6d0":

# mkboot /dev/rdsk/cXtXdX

# mkboot -a "hpux -lq" /dev/rdsk/cXtXdX

# vgchange -a y /dev/vg00
Volume group "/dev/vg00" has been successfully changed.

#vgsync /dev/vg00

To verify offline diagnostics are installed on root and mirror disks:
# lifls -il /dev/rdsk/cXtXd0

To download offline diagnostics:
# cd /usr/sbin/diag/lif

if server is a K-Class:
# mkboot -b updatediaglif -p ISL -p HPUX -p LABEL -p AUTO /dev/rdsk/cXtXd0

if server is a L/N/V/RP Class:
# mkboot -b updatediaglif2 -p ISL -p HPUX -p LABEL -p AUTO /dev/rdsk/cXtXd0

# lvlnboot -Rv /dev/vg00

Attached a document for more reference.

Hope this will help you,

Regards,

Shameer

Re: replace root mirror drive

Nguyen Anh Tien — Tue, 17 Jan 2006 22:55:58 GMT

YOUR procedure is correct in single mode.
If you want to do it online, pls see attached file. but it required HP/UX mirrored software