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I have question about iostat (hardisk detect)

Why parameters are different between iostat 1 -x and iostat -x

And it seem iostat 1 -x is more exact?

1 is the interval in seconds.

The first block of iostat provides statistics concerning the time since the system was booted.

Without an interval parameter iostat will terminate after diplaying this.

When supplying an interval parameter each subsequent report covers the time since the previous report.

wmp

redstar01

ASKER

I know that '1' is seconds update

But when overload, iostat 1 -x allway show %ubtile = 100 -> its exact
while iostat -x never show 100%util, only <50-60%, show it's not exact!

Because I want to get loadding of each harddisk (with programming script to get each disk)
And I wonder if there is any way to know exact %util

And really that iostat -x and iostat 1 -x is seem conflict?

woolmilkporc

>> And really that iostat -x and iostat 1 -x is seem conflict? <<

It's just another base - accumulated since reboot or in last interval.

redstar01

ASKER

yes,
but "-x" , parameters seem not exact, allway show <50%util if hdd really overload
while "1 -x" show parameters greater much, and 100%util if hdd really overload

redstar01

ASKER

My target:
I need know one HDD is overload or Not any time!

ASKER CERTIFIED SOLUTION

woolmilkporc

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