Date: Fri, 12 Nov 2004 23:28:18 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: Tillman Hodgson <tillman@seekingfire.com> Cc: FreeBSD-Questions <freebsd-questions@freebsd.org> Subject: Re: Setting SCSI bus options before reaching fsck at boot time Message-ID: <20041113052818.GE37496@dan.emsphone.com> In-Reply-To: <20041113040749.GB33689@seekingfire.com> References: <20041113040749.GB33689@seekingfire.com>
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In the last episode (Nov 12), Tillman Hodgson said: > I have a SCSI controller (the external 68-pin high density connector > on a Compaq Proliant 1600) that seems to ignore it's own settings > when I through its bus speed down. This is a problem, as I'm running > into /many/ SCSI bus reset problems with this ancient DEC 7-bay JBOD > tower that I'm playing with. The problems go away when I use > `camcontrol negotiate -R 10 da0` to drop the bus freq to 10MHz from > 20MHz and I'd hope to simply set the controller to that speed. No > love, sigh. FreeBSD comes up at the drives are 20MHz: > > da0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit), Tagged Queueing Enabled > > I'd like to find a way to have camcontrol (or some other mechanism) > set the SCSI bus speed on this particular SCSI chain early in the > boot process, /before/ it encounters fsck and thus trips over it's > own feet in bus resets. If it matters, the SCSI controller shows in > dmesg as: > > sym1: <875> port 0x3400-0x34ff mem 0xc6efe000-0xc6efefff,0xc6efde00-0xc6efdeff irq 10 at device 9.1 on pci1 > sym1: No NVRAM, ID 7, Fast-20, SE, parity checking > sym1: [GIANT-LOCKED] > > Any pointers? Since camcontrol is in /sbin, you can just add a line to the top of /etc/rc. A cleaner solution would be to write a small /etc/rc.d/ script and add a "BEFORE: fsck" line so it gets run before fsck. -- Dan Nelson dnelson@allantgroup.com
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