Date: Thu, 20 Jul 2000 18:38:13 +0930 From: Greg Lehey <grog@lemis.com> To: Geoff Buckingham <geoffb@chuggalug.clues.com> Cc: hackers@FreeBSD.ORG, scsi@FreeBSD.ORG Subject: Re: Multiple ro mounts of vinum volume Message-ID: <20000720183812.K30599@wantadilla.lemis.com> In-Reply-To: <20000720183341.I30599@wantadilla.lemis.com> References: <20000720095513.A50799@chuggalug.clues.com> <20000720183341.I30599@wantadilla.lemis.com>
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On Thursday, 20 July 2000 at 18:33:42 +0930, Greg Lehey wrote: > On Thursday, 20 July 2000 at 9:55:13 +0100, Geoff Buckingham wrote: >> >> Does anybody with a knowledge of the vinum code have an opinion on >> the amount of work involved in getting vinum to the point that >> several JBODs in a FC switched fabric could be managed, as a vinum >> volume, by one machine, and mounted ro by that machine and several >> others on the switch fabric. > > I'd say "no work at all" as far as Vinum is concerned. The real issue > is getting the drivers to present the individual drives to the > system. That's a device driver issue, and I don't know enough about > the current state of FC drivers to make a sensible comment. But I'd > certainly be interested to hear more. > >> (writing to that volume is obviously a fs issue) Oops, I missed the point here. Yes, the multiple R/O issue would make it very difficult to write to it. I suspect that it would be almost impossible to write while other systems had the volume open R/O. I'll think about how that could be done, but it's not simple, if it's at all possible. 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-scsi" in the body of the message
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