Also, you only posted a total io wait through top. Please use iostat to check 
each backend disk utilization. 
------ Ursprungligt meddelande------Från: Budai LaszloDatum: lör 24 mars 2018 
08:57Till: ceph-users@lists.ceph.com;Kopia: Ämne:Re: [ceph-users] Fwd: High 
IOWait Issue
Hi,

what version of ceph are you using? what is HW config of your OSD nodes?
Have you checked your disks for errors (dmesg, smartctl).
What status is the ceph reporting? (ceph -s)
What is the saturation level of your ceph ? (ceph dt)

Kind regards,
Laszlo

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