What is your disk configuration? JBOD? If RAID, possibly a dysfunctional
RAID controller, or a constantly-rebuilding array.

Do you have any idea at which files are linked the read blocks?

On 4 September 2015 at 11:02, Akmal Abbasov <[EMAIL PROTECTED]>
wrote:

*Adrien Mogenet*
Head of Backend/Infrastructure
[EMAIL PROTECTED]
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