At 02:26 AM 2/3/98 -0800, you wrote:
>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
>
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