vgsync

[Joe Profaizer]

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

[PIYUSH D. PATEL]

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

[harry d brown jr]

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

[Joe Profaizer]

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.

[James R. Ferguson]

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...

[Joe Profaizer]

#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

[PIYUSH D. PATEL]

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

[Joe Profaizer]

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

[Joe Profaizer]

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

Any other suggestions???

[PIYUSH D. PATEL]

Hi,

If you give the command

# lvsync /dev/vg00/lvol1

what is the output.

Piyush

[Joe Profaizer]

# 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".

[PIYUSH D. PATEL]

Hi,

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

Piyush

[Joe Profaizer]

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

[MANOJ SRIVASTAVA]

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

[Joe Profaizer]

# 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

[Joe Profaizer]

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

[PIYUSH D. PATEL]

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

[Joe Profaizer]

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

[James R. Ferguson · Accepted solution]

Hi Joe:

Try:

# vgchange -a y /dev/vg00

Regards!

...JRF...

[PIYUSH D. PATEL]

Hi,

What is the output of

#ioscan -fnC disk | grep c2t2d0

Piyush

[Joe Profaizer]

james had the answer.
vgchange -a y /dev/vg00

Is the above command mandatory (based on what my situation) before i vgsync?


Thanks to all!!

[PIYUSH D. PATEL]

Hi,

Your vg00 was not activated and hence all these problems. Nice catch ...JRF....couldnt guess it right !!!

Piyush

[James R. Ferguson]

Hi (again) Joe:

The kernel "thought" the disk was still absent. The 'vgchange -a y' updated kernel tables indictating its presence. Given the way you performed the operation, you would probably have to do this again.

Regards!

...JRF...

[PIYUSH D. PATEL]

Hi,

Since you had removed the secondary harddisk for loading the pacthes on the primary, these problems happened. When you loaded the patches on the primary harddisk, the OS knew that you had only one harddisk. Since your vg00 had two harddisk the vg00 had been deactivated. It could come up only beacuse of the -lq option set in the AUTO file which overrides the quorum.

Piyush