Date: Tue, 22 Jan 2002 09:22:15 -0700 From: "Kenneth D. Merry" <ken@kdm.org> To: Michael Lucas <mwlucas@blackhelicopters.org> Cc: scsi@FreeBSD.ORG Subject: Re: FAQ fact-checking Message-ID: <20020122092215.A67669@panzer.kdm.org> In-Reply-To: <20020122101255.A61116@blackhelicopters.org>; from mwlucas@blackhelicopters.org on Tue, Jan 22, 2002 at 10:12:55AM -0500 References: <20020122101255.A61116@blackhelicopters.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Jan 22, 2002 at 10:12:55 -0500, Michael Lucas wrote: > > Folks, > > This is straight from the FAQ/Handbook. I suspect that the kernel > option described is wrong. The quote marks lead me to suspect that > this is quite old, though. > > -- > Sometimes, a SCSI CDROM may be missed because it didn't have enough > time to answer the bus reset. If you have a SCSI CDROM please add the > following option to your kernel configuration and rebuild your kernel. > > options "SCSI_DELAY=15" > -- > > I suspect think it should be: > > options SCSI_DELAY=15000 > > as per GENERIC. Or am I just a loser? That is correct. The value was changed from seconds to milliseconds in the CAM transition. A kernel with SCSI_DELAY set less than 100 will not compile. That will catch most users who think the value is in seconds. (If SCSI_DELAY is set to 0, we default to the minimum value of 100ms.) It isn't just CDROM drives, but any SCSI device that takes a while to recover/reinitialize after a bus reset. With most modern SCSI devices you can get away with the default 2 second delay, but we put 15 seconds in GENERIC to cover most any peripheral a user might attach to his system. Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020122092215.A67669>