Don't forget to factor in drive compression. I have seen 4 to 1, which
requires 60 MB/sec bandwidth to keep the LTO drive streaming. (If an LTO
doesn't stream, figure 1.5 to 6 MB/sec before compression, depending on
file size)
Orville L. Lantto
Datatrend Technologies, Inc.
121 Cheshire Lane #700
Minnetonka, MN 55305
Email: [EMAIL PROTECTED]
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C: 612-770-9166
"Taylor, David" <[EMAIL PROTECTED]>
Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
12/20/01 09:20 AM
Please respond to "ADSM: Dist Stor Manager"
To: [EMAIL PROTECTED]
cc:
Subject: SCSI Channel to LTO drive rule of thumb
Hi *,
Can anyone share with me, a good rule-of-thumb for the maximum number of
LTO
drives that should be attached to a single Ultra-II SCSI bus? Using the
theoretical max transfer rates of 15 MB/s for the drives and 80 MB/s for
the
SCSI, I shoould be able to put 5 drives on one bus and still have room to
spare (theoretically). What is the generally accepted maximum number,
in
the real world?
TIA
David Taylor
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