disk usage issue 100%

February 19, 2014 at 01:28:40
Specs: RedHat 6 , x86
When I run this command :

iostat -x 5

I'm getting :

(..)
avg-cpu: %user %nice %system %iowait %steal %idle
22.12 16.85 1.20 28.71 0.00 31.12

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sda 37.80 4.20 1285.20 1.00 10584.00 30.40 8.25 48.84 34.94 0.78 100.00
sda1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
sda2 37.80 4.20 1285.20 1.00 10584.00 30.40 8.25 48.84 34.94 0.78 100.00
sdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
sdb1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
sdc 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
sdc1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
sdd 0.20 0.00 52.40 3.00 1409.60 56.00 26.45 0.34 6.14 3.79 21.00
sdd1 0.00 0.00 32.60 1.80 1036.80 28.80 30.98 0.20 5.89 5.10 17.56
sdd2 0.20 0.00 19.80 1.20 372.80 27.20 19.05 0.14 6.56 4.30 9.02
sdd3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
dm-0 0.00 0.00 0.00 5.20 0.00 41.60 8.00 7.16 1049.27 192.31 100.00
dm-1 0.00 0.00 1323.80 0.00 10590.40 0.00 8.00 50.75 35.33 0.76 100.00


My concern is on the lines reporting 100%
The device listed on top ( sda2 ), is not mounted as a directory (so, it's not "used" by processes). How come it's mentioned as 100% usage ? Is it a problem ?

What about "dm-0" ? Same issue ?

Hi there.


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#1
February 19, 2014 at 03:45:53
Are your disks using 4K sectors? If so, are the partitions correctly aligned?

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#2
February 20, 2014 at 07:35:53
I don't know enough about this to answer either question

Hi there.


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