Date: Tue, 4 Jan 2000 09:36:47 +1100 From: Jonathan Michaels <jon@welearn.com.au> To: Mitch Collinsworth <mkc@Graphics.Cornell.EDU> Cc: Andreas Klemm <andreas@klemm.gtn.com>, hardware@FreeBSD.ORG Subject: Re: wanna buy an EIDE harddisk ... 5400 or 7200 for home use (noise) Message-ID: <20000104093645.A82450@phoenix.welearn.com.au> In-Reply-To: <200001031817.NAA11146@benge.graphics.cornell.edu>; from Mitch Collinsworth on Mon, Jan 03, 2000 at 01:17:54PM -0500 References: <andreas@klemm.gtn.com> <200001031817.NAA11146@benge.graphics.cornell.edu>
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On Mon, Jan 03, 2000 at 01:17:54PM -0500, Mitch Collinsworth wrote: > > >Now I saw in the Magazine, that there is a similar drive available, > >with 2 MB cache and another drive which has additionally 7200 U/min. > > > >Does somebody know the following drives ? > >U92720U8, 27.2 GB, 9ms, 2MB cache, 5400 U/min DM 440.- (~ $220) > >U92732U8, 27.3 GB, 9ms, 2MB cache, 7200 U/min DM 460.- (~ $230) > >U93652U8, 36.5 GB, 9ms, 2MB cache, 5400 U/min DM 585.- (~ $290) > >U94098U8, 40.0 GB, 9ms, 2MB cache, 5400 U/min DM 635.- (~ $315) > > > >Do you think, the large drives (36.5 or 40 GB) will run under > >FreeBSD 3.4 and 4.0 current well ??? > > >From what we've been hearing they will probably be fine, though with > 3.4 you will have to either make partitions no larger than 27 GB or > else use the new IDE driver from 4.0. ummm, i realise that this might be a silly question, i'm not that familiar with scsi devices at all and harddrives seem to me to be the most arcane of the esoterica that is scsi. when, if, such ddevices become available for the scsi bus will the end user require doing anything special, ummm, that is take sepcial measures like your proposing for the 'ide' type bus version of these large drive devices ? i've use scsi where ever possible, because of the inherent reliability and performance (for my meager requirements) issues, such as they are. i'm assuming that such 'large' drives are created by increasing the packing density of cylinders, also the number of sectors per cylinder and that the scsi host adapter is required to have ever more processing 'grunt' to keep up with the required workload ... are these new drives more fragile than thier older and less dense counterparts, given the increase in manufacturing and materials technologies over the same period of time. is freebsd in the ball park as regards keeping up with the 'trends', as it apreas to be going .. that being single unit devices with large capacities and little if any, ummm 'scaling', wuummm, er interdevice compatability. i remember the old ide devices, even the same model from a given manufacturer would have difficulties existing in a chain of more than one device, this has (to my knowledge, or experience) not (if ever) been a probelm with scsi. of the very few that i have heard about all were replaced as warrentable failures with the replacements working as expected in chains of 5 or more devices. ideas, opinions musing etc would be most apreciated. warm regards and thanks .. best wishes for the new year. cheers, jonathan -- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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