Date: Fri, 06 Aug 1999 14:28 -0600 From: "Brian McGroarty" <BMCGROARTY@high-voltage.com> To: "Aram Compeau" <aram@tibco.com> Cc: "freebsd-hardware" <freebsd-hardware@freebsd.org> Subject: RE: Re: The $500 Performance Question Message-ID: <6568D2FFB44AD31186D40008C7333C82@high-voltage.com>
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All three hard drives are the new IBM drives. I wish I knew enough to add Ultra DMA/66 support, as I believe I've otherwise peaked on EIDE speed. I'll try a RAID configuration. This raises the question of whether there's a particular controller most favored for RAID-0. Is an Adaptec 2940UW my best bet, or is there something nicer/cheaper if performance under FreeBSD is my only concern? -----Original Message----- From: Aram Compeau [mailto:aram@tibco.com] Sent: Friday, August 06, 1999 1:20 PM To: Brian McGroarty Cc: freebsd-hardware Subject: Re: The $500 Performance Question I'm sure you're correct in assuming that the compiles are disk I/O limited. I don't think this will come close to sliding under the $500 mark, or if you want to risk it, but tying two SCSI HD's together at RAID lvl 0 is a nice disk I/O speedup. :-) This has some rather obvious inherent risks involved with it... Not to mention a hefty "opportunity cost" in replacing "already paid for" IDE disks with SCSI disks... I think you could get 2 4.5GB IBM 9ES drives (DDRS-34560, I think?) for something like $150 ea. plus the controller? So maybe a 9GB build volume for $700 or so? Anyway, just guessing. I'll be trying a similar rig (dual CPU, SCSI RAID lvl 0) myself shortly, and I'll report back the "make world -j 40" time for reference. Barring such a solution, you might consider a slightly faster HD? There wasn't enough detail below to discern, but perhaps one of those nice IBM UDMA disks with very high areal densities and GMR heads *might* give you a performance boost? I believe if you compile in single user mode, you gain a slight performance boost as well (that's free, of course! :-). To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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