RE: Mirroring, Striping, Etc.

Mitch Wagers ( mwagers@ocsnet.net )
Tue, 3 Feb 1998 02:26:56 -0800

Mirroring is usually slower unless the SCSI card can do it for you, not the
case on most Adaptecs. Stripe the set, although you will lose the "mirror"
type backup of mirroring, but it will increase performance. Also, the 2940
is a single channel SCSI host, going up to a 3940 and putting each drive on
separate channels would probably help, but you would need to find out what
kind of internal bandwidth the hard drives are using on your SCSI
card...hmmm...I'm not sure how to make this much clearer. :) Going to a
3940UW would mean upgrading to UltraSCSI 3 WIDE.

----------
From: Gregory White
Sent: Monday, February 02, 1998 2:27 PM
To: ntisp@emerald.iea.com
Subject: Mirroring, Striping, Etc.

Can someone offer some information regarding performance
improvements/degradation caused by drive mirroring and striping on NT 4?

We recently added a second drive to our mail server and set it up as a
mirror drive. Since then, it seems to be slower in responding when sending
mail. It may just be perception, since I am paying more attention to the
machine now.

We are running a PP150 w/128 MB Ram and 2- 2.1 GB SCSI on an Adaptec 2940.

Thank you,

Greg White
Direct NET Communications

----------------------------------------------------------
NTISP Mailing List listserver@emerald.iea.com

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