User's Guide

42 SCSI Commands
address. If the hard address has not changed from the address obtained in a previous successful loop
initialization, the target will attempt to obtain the address in the LIFA phase if a valid Fabric Login exists or
LIPA phase of loop initialization. If the hard address has changed, the target will attempt to obtain the new
address in the LIHA phase. When the RHA bit is set to zero, the target follows the normal initialization
procedure, including the possibility of obtaining a soft address during the loop initialization process. When
not attached to an arbitrated loop, this field is ignored the RHA bit.
Allow Login without Loop Initialization (ALWI) –This field returns zero to indicate the target will perform
the normal loop initialization procedure before entering the monitoring mode and accepting a login ELS. This
field is ignored when not attached to an arbitrated loop.
Disable Target Initiated Port Enable (DTIPE) –This field returns zero to indicate the target will enable itself
onto the loop according to the rules specified in FC-AL-2. This field is ignored when not attached to an
arbitrated loop.
Disable Target Originated Loop (DTOLI) –This field returns zero to indicate the target attached by an
arbitrated loop will generate LIP(F7,xx) after it enables a port into a loop. If the target is attached to an
arbitrated loop and detects loop failure at its input, it shall follow the error initialization process defined by
FC-AL-2 regardless of the state of this bit. This field is ignored when not attached to an arbitrated loop.
RR_TOV Units – This field indicates the units for the Resource Recovery Time-out Value field. A value of
3 is returned to indicate the units are in tenths of seconds.
Resource Recovery Time-out Value (RR_TOV) – This field returns the resource recovery time-out value
specified in RR_TOV units. For example, an RR_TOV of 14h (20 decimal) with an RR_TOV units value of
3 indicates a resource recovery time-out value of 2 seconds; and an RR_TOV of F0h (240 decimal) with an
RR_TOV units value of 3 indicates a resource recovery time-out value of 24 seconds.
Informational Exceptions Control Page (1Ch)
The Informational Exceptions Control mode page describes the capabilities of the library for reporting
exception conditions. It was previously known as the Tape Alert mode page when exception conditions were
limited to only Tape Alert flags.
The main purpose of this page is to indicate that the library can report exception conditions by being polled.
The exception conditions primarily involve the Tape Alert flags, but may include additional conditions as
well, as defined by the Sense Data.
Parameters Savable (PS) – This page is not savable, and this field is set to zero.
Page Code – This field identifies the Informational Exceptions Control mode page and returns 1Ch.
Table 40 Informational Exceptions Control Page (1Ch)
Bit
Byte
76543210
0 PS Rsvd Page Code (1Ch)
1 Parameter List Length = 0Ah
2 Perf Rsvd EBF EWasc Dexcpt Test Rsvd LogErr
3 Reserved MRIE
4
:
7
Interval Timer
8
:
11
Report Count