Unit Attention Sense Key; Power On; Scsi Bus Reset; Bus Device Reset Message - Sun Microsystems storagetek sl500 Reference Manual

Request Sense

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

Description
Power-On Occurred

SCSI Bus Reset

Bus Device Reset Message

LUN Reset

Target Reset
Not Ready-to-Ready Transition
CAP Element Accessed
Mode Parameters Changed
Reservations Preempted
Reservations Released
Registrations Preempted
Microcode Has Been Changed
LUN Data Has Changed

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.
216 SL500: Interface Reference Manual • July 2008
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