SCSI speed with SLR100 tape drive

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From
Olivier Nicole <on@cs.ait.ac.th>
Date
11 Mar 2001 19:25:26
Subject
SCSI speed with SLR100 tape drive
Message-ID
200103120325.KAA09448@banyan.cs.ait.ac.th

Replies

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Hello,

I finally got that SLR100 tape drive I wanted. It si supposed to
support SCSI 160, but anyway the machine I have only supports 80Mb.

The problem is the following:

- at boot time, going to the Symbios bios, the tape is given at
maximum speed, 80 Mb

- once FreeBSD is started, it only supports half the speed:
sa0 at sym1 bus 0 target 2 lun 0
sa0: <TANDBERG SLR100 0402> Removable Sequential Access SCSI-2 device
sa0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit)

Any idea on the reason why?

Eventually, I had to modify /usr/src/sys/cam/scsi/scsi_sa.c to remove
the leading blank from the model name in the quirk table.

Best regards,

Olivier

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