Asus P/I-P65UP8/CP6ND - Manual (Page 12)

12 ASUS P/I-P65UP8 User’s Manual
I. DOS/WINDOWS DRIVERS
I. DOS/WINDOWS (Command Lines)
Using the /DISCONNECT (or /DC) Option
SCSI devices have the ability to disconnect from the bus during an I/O transfer. This
option is used to allow a device to disconnect. If a particular host adapter has parity
checking disabled, all devices attached to it must have disconnects disabled, since
parity is required during the reselection phase. Valid options are ON (allow discon-
nects) or OFF (do not allow disconnects). The default for all devices is ON.
Option Syntax: /DISCONNECT=n[,n]*
For example, to disable disconnects on the device attached to the first host adapter
(boot order designation = 0) at SCSI ID 2, the line in your CONFIG.SYS file that
loads ASPI8XX.SYS should look like this:
DEVICE=C:[PATH]ASPI8XX.SYS /DISCONNECT=OFF<0:2>
Using the /SYNCH_RATE (or /SR) Option
This option sets the maximum synchronous transfer rate (in mega transfers per sec-
ond) to negotiate with a particular device. The allowable values are 0, 5, 10, and 20,
providing the host adapter is capable of the specified speed. To turn off synchronous
transfers for a particular device, you should specify 0. The default value is the fast-
est rate supported by your host adapter.
Option Syntax: /SYNCH_RATE=n[,n]*
For example, to turn off synchronous transfers to the device attached to the first host
adapter (boot order designation = 0) at SCSI ID 3, the line in your CONFIG.SYS
file that loads ASPI8XX.SYS should look like this:
DEVICE=C:[PATH]ASPI8XX.SYS /SYNCH_RATE=0<0:3>
Using the /PARITY (or /P) Option
This option tells your host adapter to disable the SCSI bus data integrity checking
feature known as parity. Some SCSI devices do not generate parity. Valid options
are ON (check parity) or OFF (do not check parity). The default for all devices is
ON.
WARNING: When disabling parity checking, it is necessary to disable dis-
connects for that adapter since you cannot disable parity checking for reselection.
If a device does not generate parity, and it disconnects, the I/O will never com-
plete.
Option Syntax: /PARITY=n[,n]*