timeout vale of lv and pv

[hua_1]

i get the timeout value of " lv" and " pv":

#pvdisplay -v /dev/dsk/c4t0d0
--- Physical volumes ---
PV Name /dev/dsk/c4t0d0
PV Name /dev/dsk/c8t0d0 Alternate Link
PV Name /dev/dsk/c5t0d0 Alternate Link
PV Name /dev/dsk/c9t0d0 Alternate Link
VG Name /dev/vgyz01
PV Status available
Allocatable yes
VGDA 2
Cur LV 49
PE Size (Mbytes) 4
Total PE 25596
Free PE 0
Allocated PE 25596
Stale PE 0
IO Timeout (Seconds) default
Autoswitch On


#lvdisplay -v /dev/vgyzfs/lv_fs|more
--- Logical volumes ---
LV Name /dev/vgyzfs/lv_fs
VG Name /dev/vgyzfs
LV Permission read/write
LV Status available/syncd
Mirror copies 0
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 180000
Current LE 11250
Allocated PE 11250
Stripes 0
Stripe Size (Kbytes) 0
Bad block on
Allocation strict
IO Timeout (Seconds) default


query: what value is the " default" ????
shoudl we change it ?
we use a HDS9500 disk array and rp8420. and HDS doc says that these value shoud be ajusted

[Alex Lavrov.]

From man:

lvdisplay:
IO Timeout (Seconds)
The IO timeout used by LVM for all IO to this logical volume. A value of default, indicates that the system will use the value of "forever". (Note: the actual duration of a request may exceed this timeout value when the underlying physical volume(s) have timeouts which either exceed this value or are not integer multiples thereof.)

pvdisplay:
IO Timeout The IO timeout used by the disk driver when accessing the physical volume. A value of default, indicates that the driver default IO timeout is being used.

[Alex Lavrov.]

Sorry did not answer the second question,
about timeout settings you should consult with HDS, they can tell you what values they recommend.

[hua_1]

what is the default value ???60S or ??

[Joseph Loo]

hi,

the default is 30 seconds.

regards.

[Joseph Loo · Accepted solution]

oh yah, here's the doc:

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000066258834

regards.

[hua_1]

both the " lv" and "pv" are all 30s? where can i get this information and change this value???i am not sure is there a file control this value.

[Alex Lavrov.]

Hey,did you read my answer and the document attached?

lvdisplay = "forever"
pvdisplay = 30s