Date: Sat, 23 Sep 2000 13:38:06 +0930 From: Greg Lehey <grog@lemis.com> To: Marc Tardif <intmktg@CAM.ORG> Cc: freebsd-fs@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG Subject: Re: ccd with other filesystems Message-ID: <20000923133806.B78943@wantadilla.lemis.com> In-Reply-To: <Pine.LNX.4.10.10009221124230.31864-100000@Gloria.CAM.ORG>; from intmktg@CAM.ORG on Fri, Sep 22, 2000 at 11:54:10AM -0400 References: <Pine.LNX.4.10.10009221124230.31864-100000@Gloria.CAM.ORG>
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On Friday, 22 September 2000 at 11:54:10 -0400, Marc Tardif wrote: > At which level does ccd concatenate or mirror disks? Is the > operation performed on slices or partitions? Partitions. > If slices, does it have to be set to sysid 165? If partitions, does > it have to be in the FFS format? ccd requires a ufs partition (4.2BSD in the disk label). This is stupid, since what it puts there is not a ufs file system, and it encourages you to shoot yourself in the foot and overwrite a ufs file system. > I ask because I'm not sure how the word "partition" is used > in the manpage, is it suppose to mean a slice (as in DOS > partition) or the partition of a slice? Also, I'm intrigued > by the following passage: > Note that the `raw' partitions of the disks should not be > combined. I really don't understand what this is supposed to mean. > The kernel will only allow component partitions of type FS_BSDFFS. This is basically saying the same thing as I said above: you need a partition of 4.2BSD. > Does this mean ccd will only accept FFS partitions? Yes. > Could msdos partitions, be concatenated or mirrored for example? Don't confuse the partition type that ccd wants with the data you put on it. You can put MS-DOS file systems on ccd, though I can't imagine why you'd want to. > Also, why does it say "the keryenl will only allow", isn't it ccd > which allows? Yes. But it's in the kernel. > Lastly, if ccd doesn't act on raw partitions, does that apply to > vinum also? Vinum requires partitions of type (wait for it) Vinum. We now only have raw partitions, so both work with them. But a raw partition isn't the same thing as a non-4.2BSD partition. On the whole, I'd recommend using Vinum, which is more actively maintained and gives you more flexibility. But I suspect you still have a question out there which I haven't been able to guess. Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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