3.7.0 HP StorageWorks HP Scalable NAS File Serving Software command reference guide HP Scalable NAS for Linux (AG513-96003, October 2009)

Set the timeout value
The default timeout period for PSD devices is 30 seconds. If you need to modify this
value for a particular PSD device, use the following command. value is in
milliseconds; however, the smallest unit is 10 milliseconds. A value of zero disables
timeouts.
# mxmpio timeout <value> [<psddev>]
Show number of transient errors
The mpiostat command lists the number of transient errors for each target and
shows the number of failovers and fatal errors for each device. Values represent the
number of respective events since the device was bound. If devices have not been
rebound since boot, then this represents the number of events since boot.
Show load statistics
The mpioload command shows the load (number of pending I/Os, both total and
raw) for each target (SCSI command I/Os) and total for the PSD device (block layer
I/Os), number of failovers, and fatal errors for each device.
The syntax is:
mpioload [-l] [<interval> [<count>]] [<psddev>...]
interval is the number of seconds between samplings. The default is one second.
count is the number of samples to make; the default is to sample indefinitely.
Values for failovers and fatal errors represent the number of respective events since
the device was bound. Values for load are the instantaneous number of I/Os queued
at the time of the sample. Raw I/Os are counted as requests (calls to read()/write())
while total (block layer) I/Os are per buffer_head structure (i.e., call to
make_request()).
Display general I/O statistics
The iostat command displays general I/O statistics for each device. Specific targets
of PSD devices are not monitored individually. The syntax is:
iostat [-u] [<interval> [<count>]] [<psddev>...]
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