TAPE UNIT SCSI COMMANDS

 

M2488 PRODUCT GUIDE

 

 

Table 4-13. Display Mode Selection Bits (10h)

 

 

 

 

 

 

 

QUALIFIER

 

 

DESCRIPTION

 

 

 

 

 

000b

Bytes 0 to 7 or bytes 8 to 15 are displayed based on the instructions in bits 2-4 of the format control byte. The

 

 

message is displayed until the next tape operation starts or until a new DISPLAY command is received.

 

 

 

 

 

001b

If the DISPLAY command is received when there is a cartridge in the MTU, Bytes 0 to 7 or bytes 8 to 15 are

 

 

displayed based on the instructions in bits 2-4 of the control byte. The message is displayed until the car-

 

 

tridge is removed from the MTU or a new DISPLAY command is received. No message is displayed if there

 

 

is no cartridge in the MTU.

 

 

 

 

 

 

 

 

010b

If the DISPLAY command is received when the MTU is in a ready state, nothing happens. If the DISPLAY

 

 

command is received when the MTU is not in the ready state, Bytes 0 to 7 or bytes 8 to 15 are displayed

 

 

based on the instructions in bits 2-4 of the control byte. The attention lamp blinks. The message is displayed

 

 

until the MTU becomes ready.

 

 

 

 

 

 

 

 

 

 

011b

Display left unchanged.

 

 

 

 

 

 

 

 

100b

The host message being displayed is cancelled and a unit message is displayed instead.

 

 

 

 

 

 

 

101b

Display left unchanged.

 

 

 

 

 

 

 

 

 

 

110b

Display left unchanged.

 

 

 

 

 

 

 

 

111b

If the DISPLAY command is received when there is a cartridge in the MTU, Bytes 0 to 7 or bytes 8 to 15 are

 

 

displayed based on the instructions in bits 2-4 of the control byte. The message is displayed until the car-

 

 

tridge is removed. After the cartridge is removed and until the next cartridge is loaded and becomes ready,

 

 

only bytes 8 to 15 are displayed. The display flashes. The attention lamp blinks.

 

 

 

 

 

 

4-3.4.3

DISPLAY Sense Keys (10h)

 

 

 

 

 

One of the following sense keys may be returned if a CHECK CONDITION was indicated:

 

 

 

 

 

 

 

SENSE KEY

CONDITION

 

DESCRIPTION

 

 

 

 

 

 

1h

RECOVERED ERROR

Recovery was performed while writing buffered data before the DIS-

 

 

 

PLAY was received.

 

3h

MEDIUM ERROR

1.

Write of buffered data failed due to a defective tape.

 

 

 

2.

An attempt was made to write 36-track data on 18-track formatted

 

 

 

 

medium.

 

4h

HARDWARE ERROR

1.

Write of buffered data failed due to a hardware failure.

 

 

 

2.

SCSI interface error occurred due to hardware failure (i.e. unable to

 

 

 

 

transfer display parameters)

 

 

 

3. The display panel is currently in use displaying check information for

 

 

 

 

the operator.

 

5h

ILLEGAL REQUEST

1. Reserved bit was found set in the CDB of the DISPLAY command.

 

 

 

2.

Flag bit was set and Link bit was not set.

 

 

 

3.

The parameter list length is neither 0 nor 16.

 

6h

UNIT ATTENTION

Indicates the DISPLAY command was not performed due to one of the

 

 

 

following:

 

 

 

1.

The tape cartridge may have been changed.

 

 

 

2.

The target has been reset.

 

 

 

3.

The Mode parameters have been changed by another initiator.

 

 

 

4.

The version of the microcode has been changed (microcode down-

 

 

 

 

loaded).

 

 

 

5.

A cartridge was loaded with a tape length that is too long or too short.

 

 

 

 

 

 

4-14

CG00000-011503 REV. A

April 1997

Page 96
Image 96
Fujitsu M2488 manual Display Mode Selection Bits 10h, Display Sense Keys 10h