Date: Mon, 17 Sep 2001 13:17:10 +0100 (BST) From: Alan Cox <alan@lxorguk.ukuu.org.uk> To: tlambert2@mindspring.com Cc: hch@ns.caldera.de (Christoph Hellwig), Dennis.Berger@nipsi.de (Dennis Berger), freebsd-fs@FreeBSD.ORG, opengfs-devel@lists.sourceforge.net Subject: Re: Porting a new filesystem to FreeBSD Message-ID: <E15ixKo-0006zj-00@the-village.bc.nu> In-Reply-To: <3BA5BDBC.107DC520@mindspring.com> from "Terry Lambert" at Sep 17, 2001 02:09:16 AM
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> This disagrees with a discussion I had off list, as to the use > and availableility of DLOCK, and the firmness of the SCSI III > standard. The GFS people are using Matt Jacob's fiberchannel > driver, and a network based distributed lock manager. DLOCK is available on a suprisingly large number of FC drives, but DLOCK is actually useless if you want any kind of fault tolerance - and to an extent so is the very basis of GFS. > If someone would write a fiberchannle driver, and tell me where I > can buy cheap hardware, I could probably write a GFS-like FS from > scratch; but it's not something I'm interested in taking on, if it > means that there's nothing to run it on but local disks, when I get > there (ugh!). The issue with hardware is mostly getting hold of a magic adapter. QlogicFC 2100 controllers go or $US30 at times on ebay FC drives go for peanuts because nobody knows what to do with them 2nd hand But the magic "connect a single fc driver to fc" board you need to avoid using expensive fc disk array boxes are like gold dust To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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