readvgda no output

[MoreFeo]

Hi, we've got a server (570 LPAR, aix 5.2 ML07) attached to an old Fastt500, and we're planning to migrate its external storage to EMC Symmetrix.
The EMC guys have asked us to send them the output of readvgda of the Fastt disks, to avoid possible problems (we had some problems migrating another server from Hitachi to EMC with corrupt vgdas).
The trouble is that readvgda is not showing any information on the fastt disks.

On internal disks:
# readvgda hdisk0 | more
lvmid: 1598838349
vgid: 00cbc0cc00004c000000010bbe50448d
lvmarea_len: 4212
vgda_len: 2098
vgda_psn[0]: 136
vgda_psn[1]: 2242
reloc_psn: 143373743
pv_num: 1
pp_size: 27
vgsa_len: 8
vgsa_psn[0]: 128
vgsa_psn[1]: 2234
version: 8
vg_type: 0

*=============== 1ST VGDA-VGSA: hdisk0 ===============*

.......
.......

But on Fastt disks, there's no output:
# readvgda hdisk2 | more
#


Anyone knows anything about this?

Thanks

 

[khalidaaa]

I Usually read the VGDA data using this command:

lqueryvg –p hdisk1 –At

Are you sure that the disk is online? What is the output of lspv?

Regards,
Khalid

 

[MoreFeo]

Thanks for the lqueryvg command, I totally forgot it. I will try it next monday, for today I've finished working.

And I'm sure the disks are online, I cannot check til I go to office, but if they weren't online I would be receiving a lot of calls of angry users.

 

[khalidaaa]

I just tried the readvgda on my p5570 internal disks and fastt700 with no output! but when i tried the lqueryvg i got the correct output!

I'm not sure exactly what's the reason coz i never used the readvgda for this purpose!

Good luck

Regards,
Khalid

 

[khalidaaa]

that's my first time to be interduced to this command:

http://www.tek-tips.com/viewthread.cfm?qid=1319957&page=2

See p5wizard comment at the end