On Thu, November 24, 2011 11:52 am, Oberdan Albertoni wrote: > I have 4 HDD 500GB S SATA II > with LSI 8704 ELP SAS RAID 6 > filesystem ext3 mounted with noatime, nodiratime RAID 6 over four disks. FYI, RAID 6 carries the highest 'write penalty' of all RAID levels. http://www.techrepublic.com/blog/datacenter/calculate-iops-in-a-storage-array/2182 Rearranging your disks is most likely not a short term solution. (can probably be done in a weekend's downtime but beware, restoring a few million small files takes a LOT more time than dumping them to another medium, be it disk or tape) *If* your system has a fifth drive bay, RAID 1+0 and one hot spare would have given you a much, much faster mail spool of equal size, at little extra cost. Eric Luyten. ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/
