Avago Technologies LSI SAS 3041E-R - Manual (Page 76)

3-36 UNIX Operating System Device Drivers
Version 1.3 Copyright © 2001, 2002, 2007 by LSI Logic Corporation. All rights reserved.
automatically slows the transfer rate until reliable transmission is
achieved.
Warning: These tests use a device’s internal buffer. Some older SCSI
devices freeze when they receive a Read or Write Buffer
command.
DV may be disabled on a per-device basis by setting the transfer
characteristics to ASYNC and NARROW in the adapter BIOS.
Alternatively, DV may be disabled for the driver by passing in
dv:n as a
command line argument.
This option has no effect for LSIFC9XX parts.
Maximum SCSI Bus Width
•
width:0 Wide SCSI disabled
•
width:1 Wide SCSI enabled
The maximum allowed SCSI bus data transfer width is set to the
minimum of the command line options, adapter capabilities, and NVRAM
settings.
This option has no effect for LSIFC9XX parts.
Minimum SCSI Synchronous Factor
•
factor:0x08 Ultra320 (160 Mega-transfers / second)
•
factor:0x09 Ultra160 (80 Mega-transfers / second)
•
factor:0x0A Ultra2 (40 Mega-transfers / second)
•
factor:0x0C Ultra (20 Mega-transfers / second)
•
factor:0x19 FAST (10 Mega-transfers / second)
•
factor:0x32 SCSI (5 Mega-transfers / second)
•
factor:0xFF 5 Mega-transfers/second and asynchronous
The minimum allowed SCSI synchronous factor is set to the maximum
of the command line input, adapter capabilities, and NVRAM setting. If
the minimum synchronous factor is 0xFF, the synchronous offset is set
to 0 (asynchronous).
This option has no effect for LSIFC9XX parts.