Jon Hardcastle <jd_hardcastle@xxxxxxxxx> writes:
> --- On Tue, 31/3/09, Goswin von Brederlow <goswin-v-b@xxxxxx> wrote:
>> Just see if you can get a decent bandwidth from each disk:
>>
>> for i in /dev/sd?; do dd if=$i of=/dev/null bs=1M
>> count=10240 & done
>> iostat -k 10
>>
>>
>> Halving the bus speed gives you a reasonable low
>> expectation of how
>> much data you should be able to pull of the disks. If your
>> disks can't
>> even fill half the bus bandwidth you certainly can cope
>> with more
>> disks or something is seriously wrong.
>>
>> MfG
>> Goswin
Perfectly save. Just don't do it the other way around:
!!!WARNING WRITE TEST!!!
for i in /dev/sd?; do dd if=/dev/zero of=$i bs=1M count=10240 & done
iostat -k 10
MfG
Goswin
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