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Date:	Fri, 29 Aug 2003 09:07:04 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 <1062152777-0-Info@SYNass.NET>, on 08/29/03
at 01:24 AM, "Info 4 SYNass" said:

>I assume that it would be not bad to split in 2 different groups i.e.

>Channel A: Scanner only
>Channel B: Data Storage

This is not as important as keeping the wide and narrow devices on
separate channels.

When you mix SE and LVD hardware in the same box, dual channels are import
or the LVD devices will run at SE speeds.

>But it could make a sense to split my present units into 2 groups i.e

>Scanner and CD-ROM and
>HDD and MO drive !?

The performance gain will be marginal or none at all.

>I am using SSI HHD Frames and Trays to be flexible between our systems.
>Like this I may have to re-consider using the same SCSI adapter in all
>of our systems !?

It is a good idea to use adapters that can run a fast hard drive at it's
rated speed. However, if you only use the fast drive in the system with a
slow adapter now and then, it probably does not matter.

>I am insecure if data are compatible or exchangable between these
>systems when the systems are having different SCSI units, ie. the
>existing AHA-2940AU and some newer ones i.e AHA-x9160 or any LSi units
>!?

It is very unlikely you will have any problem moving drives around with
current adapters. Over the years my main system has had a variety of
adapters and drives installed. I just swap in the new hardware, power up
and I'm done. If I have installed a new drive, I do have to move the data
around to take advantage of the new drive.

If you do upgrade to drives in th U160 class or better along with adapters
that can run them at this speed, I suspect you will find the performance
increase significantly more than you expected.

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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