HP UX disk io rate question

alert0919 · #1 (**permalink**) 05-19-2009

I only have two disk in my HP machine
but when i execute iostat command
device bps sps msps

c0t0d1 0 0.0 1.0
disk0 49 2.8 1.0
disk5 0 0.0 1.0

I didn't know where device name disk0 and disk5
device name disk0 disk5 ,it is really disk
or can I ignore it ?
when I would like to get disk io rate KB/sec

thanks

RuBiCK · #2 (**permalink**) 08-14-2009

What version of HP-UX do you have?

Could you post a "ioscan -fnCdisk"?

methyl · #3 (**permalink**) 08-14-2009

The "ioscan" recommended by RuBiCK will tell you about your discs and DVD drive. It will also force HP-UX to look.

"iostat" with no parameters always produces the same wrong figures. It needs to be run for a sample period to produce useful figures.
The output from "sar" can be more useful but it does not report on idle discs.

For a quick test you can try these two commands to sample disc performance at 10 second intervals twice.

Code:

iostat 10 2

sar -d 10 2

A realistic sample would be for a longer period.

RuBiCK · #4 (**permalink**) 08-18-2009

I'm wondering if alert0919 was using 11.31 because he has c#t#d maybe cdrom and disk# (agile view adressing) and he's asking if disk# are physical disk.

alert0919, could you post our suggestions?

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