problem while executing fio on multiple disks

[Shrirang Phansalkar <sphansalkar@xxxxxxxxxxxx>]

Hi,

I was trying to execute fio with the following job file, but I have some issues with it.

[globals]
rw=randrw
size=10M
ioengine=sync
blocksize=4k
numjobs=16
direct=1
iodepth=32
thread

[thread1]
filename=/dev/sdb
stonewall

[thread2]
filename=/dev/sdc
stonewall

[thread3]
filename=/dev/sdd
stonewall


After its completion in Disk stats I got util as :

sdb: util=99.64%
sdc: util=51.72%
sdd: util=34.76%

where as expected util for all 3 disks should be somewhat similar ( all 3 disks are of same size)

But if I run fio using separate jobfile for every disk, then I am getting almost similar disk util for each disk (around util=98% for each disk).

Pl let me know that if there is some problem with the fio or there is something wrong with my jobfile.

Thanks and regards,
Shrirang.
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