User's Guide

Quantum Scalar Intelligent Libraries SCSI Reference Guide Guide 19
• 10b – Reserved.
• 11b – Indicates the target port supports single transition and double transition.
QAS – This field is only returned for media changer device logical units controlled via parallel SCSI;
otherwise, this field is reserved. A quick arbitration and selection supported (QAS) bit of one indicates that
the target port supports quick arbitration and selection. A value of zero indicates that the target port does
not support quick arbitration and selection.
IUS – This field is only returned for media changer device logical units controlled via parallel SCSI;
otherwise, this field is reserved. An information units supported (IUS) bit of one indicates that the SCSI
target device supports information unit transfers. A value of zero indicates that the SCSI target device does
not support information unit transfers.
Version Descriptors – Indicate SCSI command compliance with certain standards. The data transfer
element hosting the interface will add/insert version descriptors reporting which physical layer and transport
layer revisions are claimed. One or more of the following version descriptors may be reported:
• 005Ch – 2 ANSI INCITS 366-2003.
• 008Dh – SAM-4.
• 0120h – SPC compliance.
• 02FEh – SMC-2 ANSI INCITS 382-2004 compliance.
• 0917h – FCP-2 ANSI INCITS 350-2003 or FCP-3.
• 0A11h – FCP-3 ANSI INCITS 416-2006.
• 0D7Dh – FC-AL-2 ANSI INCITS 332-1999 with Amnd 1 AM1-2003.
• 0DBCh – FC-FS ANSI INCITS 373-2003.
• 131Ch – FC-Tape ANSI INCITS TR-24 1999.
• 133Ch – FC-FLA ANSI INCITS TR-20 1998.
Vital Product Data Pages
The collection of Vital Product Data pages is as follows:
Supported Vital Product Data Page (00h)
Table 11 Supported Vital Product Data Page (00h)
Bit
Byte
76543210
0 Peripheral Qualifier Peripheral Device Type
1 Page Code (00h)
2 Reserved
3 Page Length
4 First Page Code Supported
5 Second Page Code Supported
6 Third Page Code Supported