topic Re: vgsync in Operating System - HP-UX

vgsync

Joe Profaizer — Tue, 16 Jul 2002 11:37:15 GMT

I have mirrored system disks and I need to install patches, so I shut our system down, pulled out the secondary boot disk (mirrored disk c2t2d0), reboot the system from the primary disk (c1t2d0), then installed patches. The system operates fine, so I want to synchronize the mirrored disks back together.

I have inserted the secondary disk, ran ioscan and insf -e.
I was told that I could now run a vgsync vg00 and the disks would go back into a mirrored system disks again. When I run a vgsync vg00, this is the error message I receive:

# vgsync /dev/vg00 /dev/dsk/c2t2d0
vgsync: Couldn't re-synchronize stale partitions of the logical volume:
I/O error
vgsync: Couldn't resynchronize logical volume "/dev/vg00/lvol1".
vgsync: Couldn't resynchronize volume group "/dev/vg00".
vgsync: Volume group "/dev/dsk/c2t2d0" does not exist in the "/etc/lvmtab" file.

vgsync: Couldn't resynchronize volume group "/dev/dsk/c2t2d0".

When I do a #more /etc/lvmtab I get the following (yuck!!):

# more /etc/lvmtab
^CM-h^B/dev/vg00
^_M-!M-pi9-uM-k^B/dev/dsk/c1t2d0
/dev/dsk/c2t2d0
/dev/vg01
^_M-!M-pi=^XM-DM-_^B/dev/dsk/c1t0d0
/dev/dsk/c2t0d0

Please consult.

Thanks!!!

..Joe

Re: vgsync

PIYUSH D. PATEL — Tue, 16 Jul 2002 11:44:43 GMT

Hi,

You only need to give the command :

# vgsync /dev/vg00

Since you have tried giving the command
#vgsync /dev/vg00 /dev/dsk/c2t2d0,
it is trying to find out if there is a volumegroup by the name /dev/dsk/c2t2d0 and giving you this error.

Always do a
#strings /etc/lvmtab ( since it is a binary file ) and not #more /etc/lvmtab

So, just issue

#vgsync /dev/vg00 and you will be through

HTH,

Piyush

Re: vgsync

harry d brown jr — Tue, 16 Jul 2002 11:46:14 GMT

Is there a reason that you have such a VERY VERY VERY POOR record of assigning points?

This member has assigned points to 108 of 567 responses to his/her questions.

http://forums.itrc.hp.com/cm/TopSolutions/1,,CA497804!1!questions,00.html

live free or die
harry

Re: vgsync

Joe Profaizer — Tue, 16 Jul 2002 11:48:50 GMT

I tried vgsync /dev/vg00 and the following results:

# vgsync /dev/vg00
vgsync: Couldn't re-synchronize stale partitions of the logical volume:
I/O error
vgsync: Couldn't resynchronize logical volume "/dev/vg00/lvol1".
vgsync: Couldn't resynchronize volume group "/dev/vg00".

#strings /etc/lvmtab
/dev/vg00
i9-u
/dev/dsk/c1t2d0
/dev/dsk/c2t2d0
/dev/vg01
/dev/dsk/c1t0d0
/dev/dsk/c2t0d0

Thanks.

Re: vgsync

James R. Ferguson — Tue, 16 Jul 2002 11:49:12 GMT

Hi Joe:

First, since '/etc/lvmtab' is a binary file, you need to view it with 'strings':

# strings /etc/lvmtab

Using 'more' with this kind of file exposes non-printable characters which merely confuse. However, you *do* have 'dev/dsk/c2t2d0' as part of vg00, along with '/dev/dsk/c1t2d0'.

I suggest you see if you have a viable connection to c1t2d0 by doing:

# diskinfo -v /dev/rdsk/c1t2d0

You should be able to read the physical disk and obtain a disk size that is non-zero. If you can't then you have a connectivity problem or a bad disk.

Regards!

...JRF...

Re: vgsync

Joe Profaizer — Tue, 16 Jul 2002 11:53:44 GMT

#diskinfo -v /dev/rsk/c1t2d0
#diskinfo -v /dev/rdsk/c2t2d0

both had good results
SCSI describe of /dev/rdsk/c1t2d0:
vendor: IBM
product id: DMVS18D
type: direct access
size: 17783240 Kbytes
bytes per sector: 512
rev level: HP05
blocks per disk: 35566480
ISO version: 0
ECMA version: 0
ANSI version: 3
removable media: no
response format: 2

Re: vgsync

PIYUSH D. PATEL — Tue, 16 Jul 2002 11:55:01 GMT

Hi Joe,

I think that the disk /dev/dsk/c2t2d0 is having problems. Check for any loose connections and you can reboor your server once and see. If not then you will have to replace the disk. Also use

#diskinfo /dev/rdsk/c2t2d0

If you still want to check the disk

#dd if=/dev/rdsk/c2t2d0 of=/dev/null bs=512k

This will take some time to check the disk.
If you get input records = output records then your disk is OK or else there is some problem.

Piyush

Re: vgsync

Joe Profaizer — Tue, 16 Jul 2002 12:00:40 GMT

I'm running the "dd" right now. I'll followup with the results.

Re: vgsync

Joe Profaizer — Tue, 16 Jul 2002 12:11:21 GMT

# dd if=/dev/rdsk/c2t2d0 of=/dev/null bs=512k
34732+1 records in
34732+1 records out

Any other suggestions???

Re: vgsync

PIYUSH D. PATEL — Tue, 16 Jul 2002 12:15:54 GMT

Hi,

If you give the command

# lvsync /dev/vg00/lvol1

what is the output.

Piyush

Re: vgsync

Joe Profaizer — Tue, 16 Jul 2002 12:17:01 GMT

# lvsync /dev/vg00/lvol1
lvsync: Couldn't re-synchronize stale partitions of the logical volume:
I/O error
lvsync: Couldn't resynchronize logical volume "/dev/vg00/lvol1".

Re: vgsync

PIYUSH D. PATEL — Tue, 16 Jul 2002 12:20:07 GMT

Hi,

Can you use the dd command on the /dev/rdsk/c1t2d0 also.

Piyush

Re: vgsync

Joe Profaizer — Tue, 16 Jul 2002 12:36:12 GMT

# dd if=/dev/rdsk/c1t2d0 of=/dev/null bs=512k
34732+1 records in
34732+1 records out

Re: vgsync

MANOJ SRIVASTAVA — Tue, 16 Jul 2002 12:40:31 GMT

Hi Joe

waht tis o/p of vgdisplay -v /dev/vg00 I think there is some PV which is not getting activated properly , can you please post that o/p too.

Manoj Srivastava

Re: vgsync

Joe Profaizer — Tue, 16 Jul 2002 12:41:59 GMT

# vgdisplay -v /dev/vg00
vgdisplay: Warning: couldn't query physical volume "/dev/dsk/c2t2d0":
The specified path does not correspond to physical volume attached to
this volume group
vgdisplay: Warning: couldn't query all of the physical volumes.
--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 12
Open LV 12
Max PV 16
Cur PV 2
Act PV 1
Max PE per PV 4350
VGDA 2
PE Size (Mbytes) 4
Total PE 4340
Alloc PE 4274
Free PE 66
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

vgdisplay: Warning: couldn't query physical volume "/dev/dsk/c2t2d0":
The specified path does not correspond to physical volume attached to
this volume group
vgdisplay: Warning: couldn't query all of the physical volumes.
--- Logical volumes ---
LV Name /dev/vg00/lvol1
LV Status available/stale
LV Size (Mbytes) 84
Current LE 21
Allocated PE 42
Used PV 1

Re: vgsync

Joe Profaizer — Tue, 16 Jul 2002 12:47:20 GMT

c2t2d0, also served as my secondary boot disk. See lvlnboot display

# lvlnboot -v
lvlnboot: Couldn't query physical volume "/dev/dsk/c2t2d0":
The specified path does not correspond to physical volume attached to
this volume group

Re: vgsync

PIYUSH D. PATEL — Tue, 16 Jul 2002 12:47:25 GMT

Hi,

This means that your PV /dev/dsk/c2t2d0 is not getting detected by the LVM.

What is the output of the

#lvdisplay -v /dev/vg00/lvol1 command.

Does it shows the stale blocks for the primary or secondary harddisk. If you can post the output.

What is the output of the

#lvlnboot -v

Regards,
Piyush

Re: vgsync

Joe Profaizer — Tue, 16 Jul 2002 12:49:15 GMT

lvlnboot -v display above in prior reply.

# lvdisplay /dev/vg00/lvol1
lvdisplay: Warning: couldn't query physical volume "/dev/dsk/c2t2d0":
The specified path does not correspond to physical volume attached to
this volume group
lvdisplay: Warning: couldn't query all of the physical volumes.
--- Logical volumes ---
LV Name /dev/vg00/lvol1
VG Name /dev/vg00
LV Permission read/write
LV Status available/stale
Mirror copies 1
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 84
Current LE 21
Allocated PE 42
Stripes 0
Stripe Size (Kbytes) 0
Bad block off
Allocation strict/contiguous
IO Timeout (Seconds) default

Re: vgsync

James R. Ferguson — Tue, 16 Jul 2002 12:53:00 GMT

Hi Joe:

Try:

# vgchange -a y /dev/vg00

Regards!

...JRF...

Re: vgsync

PIYUSH D. PATEL — Tue, 16 Jul 2002 12:54:54 GMT

Hi,

What is the output of

#ioscan -fnC disk | grep c2t2d0

Piyush