Date: Wed, 21 Apr 1999 21:33:21 -0700 From: Darren Pilgrim <dpilgrim@uswest.net> To: Mark Ovens <marko@uk.radan.com> Cc: "Francis Percival C. Favoreal" <dune@cats.edu.ph>, freebsd-questions@freebsd.org Subject: Re: SCSI problem Message-ID: <371EA691.BD1F2CED@uswest.net> References: <Pine.LNX.3.96.990421092534.18736A-100000@mayon.cats.edu.ph> <371D79EF.CA43A24B@uk.radan.com> <371E6704.B6E8A560@uswest.net> <19990422012530.D254@marder-1>
next in thread | previous in thread | raw e-mail | index | archive | help
Mark Ovens wrote: > On Wed, Apr 21, 1999 at 05:02:12PM -0700, Darren Pilgrim wrote: <snip> >> Some of the SCSI HBAs I have stage the spin-ups to avoid overloading >> the power supply. Perhaps this might be the cause? >> > > I didn't know that. Anyway I powered off my system about an hour > ago and when I powered it back up I listened for the 2nd HD spinning > up. I wasn't quite right when I said it only spun up when the BIOS > probes it. It didn't spin up 'til FreeBSD probed it!. > > I've looked at the tech sheet for the drive (PDF file) and there > are a couple of jumpers that control spin-up: > > Disable / Enable Auto Spin Up (JP5) > > This jumper controls how the drive starts when power is applied on > 50 and 68 Pin Drives . If the jumper is installed then the disk > will spin up automatically after power -on reset . If the jumper > is NOT installed the disk will NOT spin up unless the host system > issues a 'START UNIT' command to the disk. On 80 Pin Drives, if > the Jumper is not installed then the disk will spin up automatically > after Power-On Reset. If the Jumper is installed the disk will > not spin up unless the Host System issues a "Start Unit" command > to the disk. > > I've not got this jumper on so it needs a 'START UNIT' command to > spin-up. Does that come from the BIOS or the OS? UIAM, the START UNIT command comes from the HA controller directly. > Auto Start Delay and Delay Start (JP9, JP10) > > The Auto Start Delay and Delay Start pins control when and how the > drive can spin up, with the com bination of Aut o Spin option (pin > #5). When in Auto Spin up and Start Delay mode the drive start will > be delayed by a period of time multiplied by its own SCSI address. > If Auto Spin up is disabled, these jumpers will be ignored. > > Neither of these jumpers are on either but because J5 is off it > makes no difference. If J5 was on then the various combinations of > these 2 will give the following options: > > Spin up immediately after POR (Power On Reset) > Spin up 6 seconds multiplied by the disk's SCSI address after POR > Spin up 12 seconds multiplied by the disk's SCSI address after POR > > Now, I imagine that if this drive was my boot drive and jumpered > the way it is, then I might have the same problem that Francis was > having. Francis: Set the boot drive to ID 0 or set it for immediate spinup if ID 0 is already taken and you can't rearrange the addresses. That way the boot device is always ready by the time the system is ready to boot the OS. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?371EA691.BD1F2CED>