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LVM: vg[18]: pvnum=7 (dev_t=0x1f190700) is POWERFAILED

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Prashant Zanwar_2
Occasional Advisor

LVM: vg[18]: pvnum=7 (dev_t=0x1f190700) is POWERFAILED

I am having above error in syslog file of my HP 9000 server.
How can I interpret this message, there is nothing wrong on the server? Please reply..
6 REPLIES
Denver Osborn
Honored Contributor
Solution

Re: LVM: vg[18]: pvnum=7 (dev_t=0x1f190700) is POWERFAILED

It could either be a SCSI termination/connection prob, failing disk, or a busy disk where an io request didnt complete before reaching the default io timeout. to find out what disk it was on take the "dev_t:0x1f190700" value...

1f hex = 31 dec

31 = major# of sdisk driver (lsdev 31)
so we know it is a disk...

19 = c19
0 = t0
7 = d7

c19t0d7 is the device... it's recommended to increase the io timeout for disks in an array to 180.

pvdisplay /dev/dsk/c19t0d7
IO Timeout = default

pvchange -t 180 /dev/dsk/c19t0d7


Where there any "SCSI" errors leading upto the LVM POWERFAILED message?

-Denver
Prashant Zanwar_2
Occasional Advisor

Re: LVM: vg[18]: pvnum=7 (dev_t=0x1f190700) is POWERFAILED

cheers !!!

Best answer I received...

Thanks
Prashant Zanwar_2
Occasional Advisor

Re: LVM: vg[18]: pvnum=7 (dev_t=0x1f190700) is POWERFAILED

Hi,

The way you mentioned is not the case, however I am seeing that,

$ ls -altrR *dsk*|grep -i 190700
brw-r----- 1 bin sys 31 0x190700 Oct 4 01:15 c25t0d7
crw-r----- 1 bin sys 188 0x190700 Oct 4 01:15 c25t0d7
While C19t0d7 is an other device:

$ls -altrR *dsk*|grep -i c19t0d7
brw-r----- 1 bin sys 31 0x130700 Sep 15 17:21 c19t0d7
crw-r----- 1 bin sys 188 0x130700 Sep 16 16:11 c19t0d7

I am having XP array attached to system, and c19t0d7 & c25t0d7, are alternate device links.

$/usr/sbin/pvdisplay /dev/dsk/c25t0d7
PV Name /dev/dsk/c25t0d7
PV Name /dev/dsk/c19t0d7 Alternate Link
Is there any way of knowing, which path it is giving error for....Or how to know like one of the path has failed...
Please reply..


Patrick Wallek
Honored Contributor

Re: LVM: vg[18]: pvnum=7 (dev_t=0x1f190700) is POWERFAILED

The dev_t string is given in hexadecimal notation.

Denver was essentially correct, he just forgot to do the hex to decimal conversion for the 19.

19 hex = 25 decimal.

So the correct device path is c25t0d7.

I would look at the PV timeout that Denver recommended first.

Denver Osborn
Honored Contributor

Re: LVM: vg[18]: pvnum=7 (dev_t=0x1f190700) is POWERFAILED

oops, my bad :)

thanks to patrick for pointing out my math prob.

-Denver
dbk
Advisor

Re: LVM: vg[18]: pvnum=7 (dev_t=0x1f190700) is POWERFAILED

Hello Everyone,
Just an afterthought.
Instead of math how about just doing.

ll /dev/* | grep 190700

It should come back with character and block device files -- something like this -
"Assuming they were not removed" :)

brw-r----- 1 bin sys 31 0x190700 Oct 27 19:33 c25t0d7
crw-r----- 1 bin sys 188 0x190700 Oct 27 19:33 c25t0d7


Nicest thing about that is it works on any
device file that might be mentioned in
syslog.

Regards,
dbk.