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]>
Head of Backend/Infrastructure
50, avenue Montaigne - 75008 Paris