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

[Prashant Zanwar_2]

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..

[Denver Osborn · Accepted solution]

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]

cheers !!!

Best answer I received...

Thanks

[Prashant Zanwar_2]

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]

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]

oops, my bad :)

thanks to patrick for pointing out my math prob.

-Denver

[dbk]

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.