Date: Sat, 11 Oct 2003 15:14:42 +0930 From: Malcolm Kay <malcolm.kay@internode.on.net> To: =?iso-8859-1?q?Rapha=EBl=20Marmier?= <raphael@computer-rental.ch>, freebsd-questions@freebsd.org Subject: Re: a problem of hard disks ordering... Message-ID: <200310111514.42627.malcolm.kay@internode.on.net> In-Reply-To: <1C73C231-FB76-11D7-A70A-000393D67E4A@computer-rental.ch> References: <1C73C231-FB76-11D7-A70A-000393D67E4A@computer-rental.ch>
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On Sat, 11 Oct 2003 08:34, Rapha=EBl Marmier wrote: > I have recently installed FreeBSD 4.8 on a small Compaq Proliant server > with a built-in Adaptec SCSI3 controller and a SmartArray 532 raid > controller. > The root device is on the volume provided by the raid controller, which > is accessible under /dev/da#, like the built-in scsi. > > I like to add a scsi drive on the built-in scsi to use for storing > "worthless" data such as /usr/src, /usr/ports and /usr/obj, so it's > fast and doesn't hog the production volume. > > My problem is that when I add a drive to the built-in controller, it > gets mapped to /dev/da0, pushing the SmartArray's volume to /dev/da1 !!= ! > > I need this server to be able to survive a disk failure, IMHO, should > include the ability to reboot properly. However, with such a setup, the > failure of any non-raid disk would prevent the os from booting (wrong > fstab), which somehow defeats the purpose of having raid in the first > place. This is a dns and mail server, so it MUST be able to come up > again, whatever the reason of the shutdown. > > Is there a way to force the order the da driver maps drive? > No personal experience but I believe you can "wire down" both the the drives and the scsi controllers. Take a look at the man pages da(4) and scsi(4) Malcolm
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