CONFIGURATION M2488 USER’S GUIDE
4-6 CG00000-011403 REV. A April 1997
5 1 For SCSI commands which require access to tape or the data buffer, Busy status is not
generated when the command is received for an ITL nexus which is currently processing
a previously issued immediate SCSI command. If the active immediate operation is a
Rewind or Load/Unload, then the new SCSI command is rejected with Check Condition
status. The SCSI sense data generated is sense key 2 (Not Ready) and the ASC/ASCQ is
0401 (LUN is in process of becoming ready). If the active immediate operation is not a
Rewind or Load/Unload, then the new SCSI command is held (following a disconnect, if
allowed) and then processed after the current immediate operation under way has com-
pleted.
NOTES:
1) The TUR (Test Unit Ready) command is a special case in that Check Condition for not
ready, in process of becoming ready is generated if there is any active immediate opera-
tion.
2) Inquiry and Request Sense SCSI commands are processed per ANSI SCSI-2, i.e. the
Check Condition mentioned above is not generated and the data is sent to the initiator.
3) This feature is similar to FT4, bit 4 defined above, except for sense key 2 (Not Ready)
with ASC/ASCQ 0401 (LUN is in process of becoming ready) being generated.
4) If FT4, bit 4 and FT4, bit 5 are both set, then the FT4, bit 4 feature takes precedence.
0 Busy status is generated when a SCSI command, which requires access to tape or data
buffer, is received for an ITL nexus currently processing a previously issued immediate
SCSI command.
6 1 a) ANSI SCSI-3 Density Code 28h (36-track) is supported in the Mode Sense/Select
Block Descriptor. For more information, refer to the Density Code 28h information and
the Mode Sense/Mode Select commands in the M2488 Product Guide.
b) ANSI SCSI-3 REPORT DENSITY SUPPORT command is supported.
0 a) Density Code 28h is reserved (per ANSI SCSI-2). For more information, refer to the
Density Code 28h information and the Mode Sense/Mode Select commands in the
M2488 Product Guide.
b) ANSI SCSI-3 REPORT DENSITY SUPPORT command is not supported.
7 1 Support 16 (10h) byte SCSI Display command data length and format.
0 Support 17 (11h) byte SCSI Display command data length and format.
Table 4-6. S.FT4 Bit Description (Continued)
BIT VALUE DESCRIPTION
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