Hitachi 8450H/R Width bits, Disconnect, Read Write I/O Timeout secs, Scan for Device at Boot Time

Ch 4: System Environment Settings

Width (bits)

Used to set an SCSI width in bits. Use the default “8” for the Narrow-SCSI controller and the default “16” for the Wide-SCSI controller.

Narrow-SCSI

•8: (default; this value is unchangeable)

Wide-SCSI

•

•

8

16: (default)

Disconnect

Used to specify whether or not to temporarily release the bus for use by other SCSI devices when a particular SCSI device requires much processing time to execute a command requested from the board. In ordinary circumstances, use the default “On”.

Some SCSI devices do not have this “Disconnect” function. For such devices, select “Off”.

•

•

Off:	Does not release the bus.
On:	Releases the bus (default).

Read Write I/O Timeout (secs)

Used to set time-out length for read/write operation. If you choose this item, a numeric entry field is displayed. Enter a value you desire in this field, then press the [Enter] key. In ordinary situations, use the default “10”.

Scan for Device at Boot Time

Used to specify whether or not to scan this device at the time of startup.

•

•

No:	No to scan
Yes:	To scan (default)

Scan for SCSI LUNS

Used to specify whether or not to support logical unit numbers (LUNs).

NOTE: Specifying “No” will scan only LUN0 for some devices replying with all LUNs regardless of whether or not they are in use.

•	No:	No to support
•	Yes:	To support (default)

Queue Tags

Used to specify whether or not to support addition of commands.

•	Off:	Not to support
•	On:	To support (default)

Initial Boot Device

Used to specify whether or not to boot from this device at the time of startup.

•	No:	Not to boot (default)
•	Yes:	To boot

Hitachi PC VisionBase 8450H/R Server 105