Date: Sat, 20 Feb 1999 09:43:04 +1030 From: Greg Lehey <grog@lemis.com> To: Glenn Johnson <gljohns@bellsouth.net> Cc: questions@FreeBSD.ORG Subject: Re: advice on setting up a Vinum volume Message-ID: <19990220094304.G93492@lemis.com> In-Reply-To: <19990202114815.A90204@symbion.srrc.usda.gov>; from Glenn Johnson on Tue, Feb 02, 1999 at 11:48:15AM -0600 References: <19990201232551.A8463@gforce.johnson.home> <19990202162645.W76680@freebie.lemis.com> <19990202114815.A90204@symbion.srrc.usda.gov>
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On Tuesday, 2 February 1999 at 11:48:15 -0600, Glenn Johnson wrote: > On Tue, Feb 02, 1999 at 04:26:45PM +1030, Greg Lehey wrote: >> On Monday, 1 February 1999 at 23:25:52 -0600, Glenn Johnson wrote: >>> I am getting a new ultra SCSI disk. I don't have it yet but it will be >>> something between 4 and 4.5 GB. I currently have a WDC AC21600H, 1549MB >>> drive. I will be making the SCSI disk my primary disk and was trying to >>> think of ways to use my existing IDE drive. What I was thinking was to >>> take 1549MB from the SCSI disk and make a Vinum striped volume with it >>> and the IDE drive. Does any one have a feel for what the performance of >>> that setup would be? >> >> As long as you have only one drive per IDE controller, and if you can >> use DMA, performance should be acceptable. It depends a lot on how >> you set up Vinum, of course. > > Thanks. > > I will have the IDE drive on the first channel of the controller with an > ATAPI CDROM drive on the other channel. I hope I have the terminology > right. So, the IDE hard drive will be wd0, and the CDROM will be > wd2. The hard drive is capable of DMA. > > When you say performance should be acceptable, does that imply that > performance would be better if I didn't use a Vinum striped volume? No, striping will not make much difference in this case, since you won't have multiple concurrent accesses. > I was considering using the striped volume for /usr/obj and > /usr/ports. Why do you want two file systems? You're just asking to run out of space in one and have space left over in the other. Greg -- When replying to this message, please copy the original recipients. For more information, see http://www.lemis.com/questions.html See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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