Setting disk timeouts

Q: What is the timeout for disk operations? A. There are two methods. One is for LVM operations and is accomplished with pvchange -t. This sets the limit for LVM operations to a disk or LUN. It can be set to zero to use the driver’s default value. The disk driver values vary between versions and is not published. The most common value seems to be 30 seconds. For 11.31, there are two additional timeout values: esd_secs and path_fail_secs. The first value (esd_secs) is for the esdisk drive and sets the driver timeout. The second value (-a path_fail_secs) is specific to multipath disk LUNs and is the time to wait before declaring a LUN path to be dead. scsimgr at HP-UX version 11.31 can set both the esdisk timeout (esd_secs) as well as the dead path detection timeout (path_fail_secs). Not all values are published in the man page, use this manual: http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c01914672/c01914672.pdf – See more at: http://serviceitdirect.com/blog/setting-disk-timeouts#sthash.Jl9WD0TL.dpuf