Hello, I think this needs a few more eyes: http://lists.freebsd.org/pipermail/freebsd-scsi/2009-January/003782.html In short, writes are slow, likely do to the write-cache being enabled on the controller. The sysctl used in 6.x to turn the cache off don't seem to be in 7.x. Thanks, Charles ___ Charles Sprickman NetEng/SysAdmin Bway.net - New York's Best Internet - www.bway.net spork@bway.net - 212.655.9344
Charles Sprickman wrote:> Hello, > > I think this needs a few more eyes: > > http://lists.freebsd.org/pipermail/freebsd-scsi/2009-January/003782.html > > In short, writes are slow, likely do to the write-cache being enabled on > the controller. The sysctl used in 6.x to turn the cache off don't seem > to be in 7.x.I have two Dell 860's here also running 7.1-REL. A simple dd on one shows roughly 60MB/s writes to a mirror of 2 320GB disks on what I'm assuming is the same LSI controller card (SAS5) richard@moses:~# cat /boot/loader.conf hw.mpt.enable_sata_wc=1 Seems to work just fine for me. Regards, Richard -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/x-pkcs7-signature Size: 2709 bytes Desc: S/MIME Cryptographic Signature Url : http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20090129/743b826d/smime.bin