Avago Technologies LSI20160 - Manual (Page 173)

Using Command Line Options 7-13
Copyright © 1993–2001 by LSI Logic Corporation. All rights reserved.
/SYNCH_RATE
or
/SR Sets the maximum synchronous transfer rate (in Mbyte transfers per second) to
negotiate with a particular device. The allowable values for this setting are 0, 5,
10, 20, 40, and 80 Mbyte transfers per second, if the adapter is capable of the
specified speed.
All host adapters in the LSI Logic family support at least 10 Mbyte transfers per
second; some support 20, 40, or 80 Mbyte transfers per second. To turn off
synchronous transfers for a particular device, specify 0 (zero).
The value set by this option only defines the maximum transfer rate negotiated.
The actual rate also depends on the device’s capability. The default value is the
fastest transfer rate that is supported by a particular host adapter.
Note: The maximum synchronous transfer rates effectively double when the
adapter and device permit wide transfers (see the
/WIDTH option). For example,
a synchronous transfer rate setting of 40 Mbyte transfers per second actually
produces a transfer rate of 80 Mbyte transfers per second if the adapter and
device both allow and are set to perform wide transfers.
Syntax: /SYNCH_RATE = n[,n]*
where: n = 0, 5, 10, 20, 40, or 80.
To turn off synchronous transfers to ID 3 on host adapter 0, the line in the
CONFIG.SYS file that loads SYM8XX.ADD should look like this:
BASEDEV=SYM8XX.ADD /SYNCH_RATE=0<0:3>
To set synchronous transfers to 10 Mbyte transfers per second on all devices on
adapter 1, the line in the
CONFIG.SYS file that loads SYM8XX.ADD should look like
this:
BASEDEV=SYM8XX.ADD /SR=10<1>
Table 7.1 OS/2 Command Line Options (Cont.)
Option Name Description