Date: Fri, 1 Oct 1999 20:38:48 +0300 (EEST) From: Narvi <narvi@haldjas.folklore.ee> To: jin@george.lbl.gov Cc: hackers@FreeBSD.ORG Subject: Re: SCSI disk naming problem Message-ID: <Pine.BSF.3.96.991001203554.86170A-100000@haldjas.folklore.ee> In-Reply-To: <199910011710.KAA18313@george.lbl.gov>
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See LINT on details of how to wire down scsi devices... Your proposal doesn't take adding a second scsi card into account. On Fri, 1 Oct 1999 jin@george.lbl.gov wrote: > Current FreeBSD SCSi disk naming mechanism is problem for using more than > one disks in the chain during the disk failure. > > The problem is that the name is not fixed with is SCSI ID. e.g., > if one disk is presented in the chain, regardless its SCSI ID, it is > always named "da0"; > > if two disks are installed, the one with lower ID is named da0 and the > other will be named as da1. When the lower ID one is crashed, then the > other disk will be named as da0 (from da1) after reboot, and it is not > mountable due to the name changing. > > If a system has a UW SCSI controller with 15 disks in the chain, > when the first disk (ID = 0) crashed, all rest 14 disks will be > useless until either fstab modified or another disk is added with > SCSI ID = 0. > > Why not we use a fixed name corresponding the SCSI ID. That is, > disk with ID 0 will be always named as da0, and disk with ID 1 > will be always named da1, etc.? > > Is there problem with fixed disk naming mechanism? > > -Jin > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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