Hi, Actually, it seems a common problem with WD "EARS" drives (advanced format) !
Please, see this other OpenSolaris thread : https://opensolaris.org/jive/thread.jspa?threadID=126637 It is worth investigating ! I quote : > Just replacing back, and here is the iostat for the new EARS drive: > http://pastie.org/889572 > > Those asvc_t's are atrocious. As is the op/s throughput. All the other drives > spend the vast > majority of the time idle, waiting for the new EARS drive to write out data. > > This is after isolating another issue to my Dell PERC 5/i's - they apparently > don't talk nicely > with the EARS drives either. Streaming writes would push data for two seconds > and pause > for ten. Random writes ... give up. > On the Intel chipset's SATA - streaming writes are acceptable, but random > writes are as > per the above url. > > Format tells me that the partition starts at sector 256.But given that ZFS > writes variable > size blocks, that really shouldn't matter. > > When plugged the EARS into a P45-based motherboard running Windows, HDTune > presents a normal looking streaming writes graph, and the average seek time > is 14ms - > the drive seems healthy. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
