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Root mirror

Spark_2
Frequent Advisor

Root mirror

Hi,

Please see the following:

# lvlnboot -v
Boot Definitions for Volume Group /dev/vg00:
Physical Volumes belonging in Root Volume Group:
/dev/dsk/c2t0d0s2 (4/0/1/1/0/4/0.0.0) -- Boot Disk
/dev/dsk/c0t0d0 (6/0/1/1/0/4/0.0.0)
Boot: lvol1 on: /dev/dsk/c2t0d0s2
Root: lvol3 on: /dev/dsk/c2t0d0s2
Swap: lvol2 on: /dev/dsk/c2t0d0s2
Dump: lvol2 on: /dev/dsk/c2t0d0s2, 0

setboot
Primary bootpath : 4/0/1/1/0/4/0.0.0
HA Alternate bootpath :
Alternate bootpath : 6/0/1/1/0/4/0.0.0

Autoboot is ON (enabled)

lvdisplay /dev/vg00/lvol7
--- Logical volumes ---
LV Name /dev/vg00/lvol7
VG Name /dev/vg00
LV Permission read/write
LV Status available/syncd
Mirror copies 0
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 20480
Current LE 640
Allocated PE 640
Stripes 0
Stripe Size (Kbytes) 0
Bad block on
Allocation strict
IO Timeout (Seconds) default

similarly mirror copies 0 for all using chkdsks script

# vgdisplay -v vg00| grep "PV Name"
PV Name /dev/dsk/c2t0d0s2
PV Name /dev/dsk/c0t0d0

So, the system doesnt have a mirrored root disk and no HA alternate bootpath.
1. Am I correct?
2. Need help on HA alternate and alternate bootpaths.
3. How to go about the problem now.

3 REPLIES
Sunny123_1
Esteemed Contributor

Re: Root mirror

Hi


You didn't have the mirror and you have the alternate bootpath which is
6/0/1/1/0/4/0.0.0



Regards
Sunny
R.K. #
Honored Contributor

Re: Root mirror

Hi Spark,

>> system doesnt have a mirrored root disk
Correct

>> How to go about the problem now

Check if /dev/dsk/c0t0d0 is a disk or DVD drive
# ioscan -fnC disk

Else, you can add a free disk to VG00 and then follow the mirror procedure (Page 50-53).
http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad_WP.pdf
Don't fix that what ain't broke
SoorajCleris
Honored Contributor

Re: Root mirror

Hi,

So, the system doesnt have a mirrored root disk and no HA alternate bootpath.
1. Am I correct?

Yes you dont have the boot disk mirrored.

2. Need help on HA alternate and alternate bootpaths.

HA alternate and Alternate boot path is nothing but from where you can boot if there is a primary boot disk failure.

Currently you dont have a mirrored disk and there is no point of seting up those path.

Currently there is an alternate path set, I dont know which is that disk, however as lvlnboot/lvdisplay doesnt show anything it is useless.

3. How to go about the problem now.

choose a freedisk and mirror the root vg and set the alt path.

If you need more assistance ,

upload.

1. strings /etc/lvmtab
2. ioscan -fnC disk
3. vgdisplay -v vg00

Regards,
Sooraj

"UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity" - Dennis Ritchie