topic Error in VGID in Operating System - HP-UX

Error in VGID

Sebastien Masson — Mon, 26 Nov 2001 18:11:56 GMT

Here it is:

On host A (uname -i: 438563351)
#pvcreate -f /dev/rdsk/c0t9d0
#echo 0x2008?4D|adb /dev/dsk/c0t9d0
2008: 438563351 1006797988 0 0

On host B (uname -i: 431564361)
#pvcreate -f /dev/rdsk/c0t9d0
#vgcreate /dev/vg01 /dev/dsk/c0t9d0
#echo 0x2008?4D|adb /dev/dsk/c0t9d0
2008: 431564361 1006371258 431564361 1006371262

Host A (uname -i: 438563351)
# echo 0x2008?4D|adb /dev/dsk/c0t9d0
2008: 431564361 1006797997 431564361 1006798119

Conclusion:

The last number is the VGID, so someone can tell if adb extract bad information or what ?!! (and it sure, that the same disk).

Re: Error in VGID

harry d brown jr — Mon, 26 Nov 2001 18:50:39 GMT

Sebastien,

I'm not sure it's a VGID, but you can get the same thing is you did this:

echo 0x2008?4X|adb /dev/dsk/c0t9d0

and this:

dd if=/dev/dsk/c0t9d0|od -xc|more

live free or die
harry

Re: Error in VGID

Alan Riggs — Mon, 26 Nov 2001 18:57:15 GMT

The VGID, I believe, begins at 2010, which means that the third number returned by your command (which starts at 2008) would be teh VGID. That number matches on both systems.

An easy way to check this is with vgexport -s -p -m mapfile vg01 from system B. The first line wil show you the VGID.

Re: Error in VGID

Alan Riggs — Mon, 26 Nov 2001 19:04:51 GMT

Ooops:

I was correct about the starting point, but the VGID is, of course, 2 words long. I was confused because you are pulling it out in decimal rather than hex, so the string was longer than I expected. Just for grins, try using dd to pull the string on each system:

dd if=/dev/rdsk/cxtxdx bs=1024 skip=8 count=9 | dd bs=8 skip=2 count=1 | od -a|head -1

Re: Error in VGID

Anthony deRito — Mon, 26 Nov 2001 19:12:11 GMT

Might want to try this...

# dd if=/dev/rdsk/c0d0s2 bs=1k skip=8 count=1 of=/tmp/xxx

This will let you seet the PVRA physical volume reserve area on the disk

# xd -c /tmp/xxx

0000000 L V M R E C 0 1 + ab G 15 . 91 06 E
0000010 + ab G 15 . 91 06 J \0 14 2 13 \0 \0 \0
\00000020 \0 \0 02 0 \0 \0 \b ` \0 \0 01 06 \0 \0 \0
0000030 \0 \0 \b ` \0 \0 \t x \0 \0 \0 \b \0 \0 \t p
0000040 \0 \0 \n 88 \0 14 \0 \0 \0 0b ` \0 \0 \0 16
0000050 \0 \0 10 \0 \0 \0 06 b3 \0 14 + ` \0 \0 \0 a1
0000060 \0 \0 \0 \0 \0 \0 \0 10 \0 \0 \0 80 \0 \0 \0
020000070 \0 \0 \0 80 \0 \0 \0 88 \0 \0 \0 06 \0 \0 \0
0000080 \0 \0 \0 8a \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
0000090 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \03.

# xd /tmp/xxx

0000000 4c56 4d52 4543 3031 2bab 4715 2e91 0645
" L V M R E C 0 1"
0000010 2bab 4715 2e91 064a 0014 3213 0000 0000
--------- last physical sector number. (1323539. physical sector = 1k)
0000020 0000 0230 0000 0860 0000 0106 0000 000a
0000030 0000 0860 0000 0978 0000 0008 0000 0970
0000040 0000 0a88 0014 2000 0000 0b60 0000 0016
0000050 0000 1000 0000 06b3 0014 2b60 0000 00a1
0000060 0000 0000 0000 0010 0000 0080 0000 0002
0000070 0000 0080 0000 0088 0000 0006 0000 0082
0000080 0000 008a 0000 0000 0000 0000 0000 0000
0000090 0000 0000 0000 0000 0000 0000 0000 0000

Tony

Re: Error in VGID

James R. Ferguson — Mon, 26 Nov 2001 19:24:15 GMT

Re: Error in VGID

Sridhar Bhaskarla — Mon, 26 Nov 2001 19:46:40 GMT

My post is missing somehow here..

Try exporting everything and then import
the volume groups. Do not do pvcreate once you are done with the volume group creation. It will wipe off the VGID.

-Sri

Re: Error in VGID

Sebastien Masson — Mon, 26 Nov 2001 20:21:23 GMT

No thanks for all your help. It's a problem and after installing the Decembre2001 patch bundle (HP-UX 11.11) everything fine.

It's really a problem in the kernel. adb doesn't repport the good think..