On 2010-03-05 13:18, Dag-Erling Smørgrav wrote:
Hmm, how does that work? Doesn't the BIOS spin the disks up long before the kernel even loads? Can you set a flag on the disk to tell it not to?
A jumper (marked PM2 on WD disks; no idea for other brands). From Wikipedia: "[PUIS] can usually be enabled by a jumper shunt on the drive but can be configured by other means (configuration sector) using manufacturer specific tools." and: "PUIS requires corresponding BIOS support. If [PUIS] is enabled on the drive but not supported by the BIOS, the drive will not be detected by the system or detected as zero in size. PUIS typically only supported on RAID Controllers." I have an Areca RAID card that indeed has this capability. It can also spin up the disks in staggered fashion, with a selectable interval. _______________________________________________ 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"
