Hi Martin, On 23.09.2015 10:51, Martin Truhlář wrote:
Tests revealed, that problem is somewhere in disk array itself.
are you familiar with the ashift problem on 4k drives? My best guess would be that the 1 TB WD drives are emulating a block size of 512 bytes while using 4k sectors internally. OmniOS is using a ashift value of 9 then to align the data efficiently (on 512 byte sectors!). This slows the whole pool down - I had the same problem before. The ashift value has to be 12 on 4k drives!
Try the command 'zdb' to gather the values for your drives. Look for 'ashift: 9' oder 'ashift: 12'.
Regards, Hanno _______________________________________________ OmniOS-discuss mailing list OmniOS-discuss@lists.omniti.com http://lists.omniti.com/mailman/listinfo/omnios-discuss
