Date: Wed, 18 Nov 1998 19:28:53 -0600 From: David Kelly <dkelly@hiwaay.net> To: "Patrick Seal" <patseal@hyperhost.net> Cc: "FBSDQ" <freebsd-questions@FreeBSD.ORG> Subject: Re: SCSI Adapters Message-ID: <199811190128.TAA02696@n4hhe.ampr.org> In-Reply-To: Message from "Patrick Seal" <patseal@hyperhost.net> of "Tue, 17 Nov 1998 17:13:39 EST." <000001be1277$874e0cc0$0200a8c0@asus.hyperhost.net>
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"Patrick Seal" writes: > Of all currently supported SCSI Adapters (2.2.7) which brand is considered > the best? Which brand has the best reliability etc. Judging from FreeBSD > support, it would be either Adaptec/Buslogic. I currently have a Buslogic > LT thingy, but It's not supported by FreeBSD. The standard answer in the past has been, "Adaptec 2940 family (aic7870, aic7880, aic789x) are the highest preformance, most carefully tweaked FreeBSD SCSI drivers. But the Symbios cards are cheap and you'd have to measure closely to detect the difference in performance (if any)." Possibly the biggest difference between my Adaptec 2940 and Asus SC875 is the Adaptec has low level format and surface scanning utilities built into its BIOS, where the Symbios based card requires DOS-based uitilities to do the same. Am told Tekram's Symbios cards have these utilities in their BIOS. Lately with CAM, tag queuing, and softupdates enabled I've noticed quite a performance increase on my SC875 mounted HD. Currently I only have tape drives on the 2940. Not shopping very hard, Asus SC875 (Symbios Ultra-Wide w/FLASH BIOS on card) sells for $110. Cards based on the Symbios '810 (narrow, no BIOS on card, you have to have it on your MB) are about $60. And '815 (narrow but with BIOS on card) can usually be found for about the same $60. -- David Kelly N4HHE, dkelly@nospam.hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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