Request Sense
Julyl 2017 Command Set 227
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.
Not Ready to Ready Transition
The library generates this type of Unit Attention when the library transitions to a
ready state from a not ready state. This transition can occur following any conditions
that cause a not ready state. A Unit Attention is generated for all initiators.
Mailslot Element Accessed
The library generates this type of Unit Attention when the operator opens and closes
the mailslot. Issue a Read Element Status command to obtain an updated inventory.
A Unit Attention is generated for all initiators.
Power On, Reset, or Bus Device Reset Occurred
The IBM Bridged Tape Drive generates this type of Unit Attention when the library is
powered on, restarted from the user interface, reset over the interface, or when the
bridged tape drive is reset. A Unit Attention is generated for all initiators.
Power-On Occurred
The HP Bridged Tape Drive generates this type of Unit Attention when the library is
powered on, restarted from the user interface, reset over the interface, or when the
bridged tape drive is reset. A Unit Attention is generated for all initiators.
TABLE 4-126 Unit Attention Sense Keys
Description Sense Key ASC ASCQ
Not Ready-to-Ready Transition 6h 28h 00h
Mailslot Element Accessed 6h 28h 01h
Power On, Reset, of Bus Device Reset Occurred 6h 29h 00
Power-On Occurred 6h 29h 01h
Target Reset 6h 29h 02h
LUN Reset 6h 29h 03h
Device Internal Reset 6h 29h 04h
Mode Parameters Changed 6h 2Ah 01h
Reservations Preempted 6h 2Ah 03h
Reservations Released 6h 2Ah 04h
Registrations Preempted 6h 2Ah 05h
Data Transfer Device Removed 6h 3Bh 1Ah
Data Transfer Device Inserted 6h 3Bh 1Bh
To Next Page
Loading...
Need help?
General