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Date:	Sat, 30 Aug 2003 10:51:32 PDT7
From:	"Steven Levine" <steve53@earthlink.net >
Reply-To:	scoug-help@scoug.com
To:	scoug-help@scoug.com
Subject:	SCOUG-Help: What SCSI adapter to choose !?

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In <5.1.0.14.2.20030829094836.021fcc50@mail.vcnet.com>, on 08/29/03
at 11:47 PM, Steve Carter said:

>Dual channel SCSI host adapters make a LOT of sense for backwards
>compatibility reasons. Although SCSI is both backwards and (somewhat)
>forward compatible, the HA will operate the bus at the lowest common
>denominator (speed) of whatever is on the bus.

This is not quite true. As long as the devices are properly designed, for
a given termination type (LVD/DE) the individual devices will operate at
their rated max speed. Some of the slower devices might have touble
negotiating transfer rates, so the HBA BIOS provides settings to handle
this.

>If your motherboard doesn't have 64-bit PCI slots, you can still use a
>64-bit PCI card provided you have clearance for the additional connector
>length.

This true for some of the 64-bit cards, but not all. Some of the U320
HBAs claim to be 64-bit only.

Steven

--
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"Steven Levine" MR2/ICE 2.37 #10183 Warp4/FP15/14.093c_W4
www.scoug.com irc.webbnet.info irc.fyrelizard.org #scoug (Wed 7pm PST)
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