On 7 September 2011 13:54, Tim Gustafson <t...@soe.ucsc.edu> wrote: > > What are the drives exactly? You may have issues like TLER or > > frequent head parking. Are these SATA, SCSI or SAS and are port > > multipliers in use? > > root@bsd-03: dmesg | grep da6 > da6 at mpt0 bus 0 scbus1 target 1 lun 0 > da6: <ATA WDC WD2003FYYS-0 1D01> Fixed Direct Access SCSI-5 device > da6: 300.000MB/s transfers > da6: Command Queueing enabled > da6: 1907729MB (3907029168 512 byte sectors: 255H 63S/T 243201C) > > The drives are housed in two of the following enclosures: > > ses0 at mpt0 bus 0 scbus1 target 32 lun 0 > ses0: <PROMISE 3U-SAS-16-D BP 0107> Fixed Enclosure Services SCSI-5 device > ses0: 300.000MB/s transfers > ses0: Command Queueing enabled > ses0: SCSI-3 SES Device > > Each enclosure is directly connected by a dedicated cable to the 2-port > controller: > > mps0: <LSI SAS2008> port 0xfc00-0xfcff mem > 0xef5f0000-0xef5fffff,0xef580000-0xef5bffff irq 44 at device 0.0 on pci1 > mps0: Firmware: 07.15.04.00 > mps0: IOCCapabilities: > 185c<ScsiTaskFull,DiagTrace,SnapBuf,EEDP,TransRetry,IR> > mps0: [ITHREAD] > > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > Tim Gustafson > t...@soe.ucsc.edu > Baskin School of Engineering > 831-459-5354 > UC Santa Cruz Baskin Engineering > 317B > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- >
You'll be interested in the thread "PCIe SATA HBA for ZFS on -STABLE" on the FreeBSD-STABLE list between 31 May 2011 and 12 June 2011. Jeremy Chadwick's post on the 1st of June is particularly enlightening. Advice is: Use -STABLE and not -RELEASE Upgrade firmware Avoid port multipliers I'm having no troubles but with 8 identical SATA disks instead of SAS. As I'm using cheap 4K green drives I had to use wdidle3.exe to fix the 8 second head parking and I also had to use gnop to force my ZFS pool to use 4K transfers. mps0: <LSI SAS2008> port 0xee00-0xeeff mem 0xfbdfc000-0xfbdfffff,0xfbd80000-0xfbdbffff irq 16 at device 0.0 on pci1 mps0: Firmware: 07.00.00.00 da0 at mps0 bus 0 scbus0 target 0 lun 0 da0: <ATA WDC WD20EARS-00M AB51> Fixed Direct Access SCSI-5 device da0: 300.000MB/s transfers da0: Command Queueing enabled da0: 1907729MB (3907029168 512 byte sectors: 255H 63S/T 243201C) _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
