Request Sense
216 SL500: Interface Reference Manual • July 2008 Revision: F • 96122
Unit Attention Sense Key
The library generates a Unit Attention sense key for all initiators if the library
needs to inform the host of an asynchronous event. The following pages describe
library conditions that generate Unit Attention errors.
TABLE 6-89 Unit Attention Sense Keys
Power On
The library generates this type of Unit Attention when the library is powered-on,
IPLed from the operator panel, or reset over the interface. A Unit Attention is
generated for all initiators.
SCSI Bus Reset
The library generates this type of Unit Attention to all initiators after the SCSI bus
is clear of all I/O processes following a hard reset.
Bus Device Reset Message
The library generates this message to all initiators after the library is clear of all
I/O processes following a hard reset.
LUN Reset
The library generates this type of Unit Attention to all initiators after the library is
clear of all I/O processes following the LUN reset.
Description Sense Key ASC ASCQ
Power-On Occurred 6h 29h 01h
SCSI Bus Reset 6h 29h 02h
Bus Device Reset Message 6h 29h 03h
LUN Reset 6h 29h 03h
Target Reset 6h 29h 03h
Not Ready-to-Ready Transition 6h 28h 00h
CAP Element Accessed 6h 28h 01h
Mode Parameters Changed 6h 2Ah 01h
Reservations Preempted 6h 2Ah 03h
Reservations Released 6h 2Ah 04h
Registrations Preempted 6h 2Ah 05h
Microcode Has Been Changed 6h 3Fh 01h
LUN Data Has Changed 6h 3Fh 0Eh
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