M2488 PRODUCT GUIDE TAPE UNIT SCSI COMMANDS
April 1997 CG00000-011503 REV. A 4-11
4-3.3.3 DISPLAY Sense Keys (11h)
One of the following sense keys may be returned if a CHECK CONDITION was indicated:
Table 4-9. Display Mode Selection Bits (11h)
QUALIFIER DESCRIPTION
000b Bytes 1 to 8 or bytes 9 to 16 are displayed based on the instructions in bits 2-4 of control byte. The mes-
sage 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 1 to 8 or bytes 9 to 16
are displayed based on the instructions in bits 2-4 of the control byte. The message is displayed until the
cartridge 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 DIS-
PLAY command is received when the MTU is not in the ready state, Bytes 1 to 8 or bytes 9 to 16 are dis-
played 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 1 to 8 or bytes 9 to 16
are displayed based on the instructions in bits 2-4 of the control byte. The message is displayed until the
cartridge is removed. After the cartridge is removed and until the next cartridge is loaded and becomes
ready, only bytes 9 to 16 are displayed. The display flashes. The attention lamp blinks.
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 17.
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.
