User's Guide

Quantum Scalar Intelligent Libraries SCSI Reference Guide Guide 17
Peripheral Device Type – For Media Changer logical units, this field returns 01000b (08h) to indicate it is
a media changer device. For the Controller logical unit, this field returns 01100b (0Ch) to indicate it is a
Controller Device. If an unsupported LUN was specified, this field returns 11111b (1Fh), which indicates that
the device type is unknown.
Removable Medium Bit (RMB) – For Media Changer logical units, this field returns 1, indicating media is
removable. For the Controller logical unit it returns 0.
Version – This field returns 03h, indicating compliance with the SCSI-3 standard.
Asynchronous Event Reporting Capability (AERC) – Returned as 0, indicating AERC is not supported.
Normal ACA Supported (NormACA) – If the media changer device is configured through a control path
drive, the NACA bit is not supported and this field returns 0.
Hierarchical Support (HiSup) – This field returns a 1, indicating that the hierarchical addressing model is
used to assign LUNs, and that the REPORT LUNs command is supported.
Response Data Format – Returned as 0010b, indicating response data is in standard SCSI format.
Additional Length –
• When requesting a standard inquiry response from the DA Blade Controller logical unit, this field is
set to 1Fh, indicating 31 additional bytes of data following this field.
• When requesting a standard inquiry response from a Media Changer logical unit hosted by a DA
Blade, this field returns 33h, indicating 51 additional bytes of data following this field.
• When requesting a standard inquiry response from a Media Changer logical unit hosted by a tape
drive, this field is set by the Media Changer to 33h, indicating that 51 additional bytes of data will be
following this field. However, the tape drive hosting the Media Changer control path may modify
data within the response and update the length value, depending on the tape drive interface type
and supported version descriptors.
SCC Supported (SCCS) – For the Media Changer logical units, this field returns a 0. For the DA Blade
Controller logical unit, this field returns a 1.
Target Port Groups Supported (TPGS) – If the Media Changer control path is hosted by a DA Blade, this
field is set to 0. If the Media Changer control path is hosted by a tape drive, this field is filled in by the tape
drive hosting the interface and may be set to 1 if the REPORT TARGET PORT GROUPS command is
supported.
Third Party Copy (3PC) – This field is set to 0 to indicate that third party copy is not supported.
PROTECT – This field is set to 0 to indicate that protection information is not supported.
Basic Queuing (BQue) – Returned as 0, indicating basic queuing is not supported.
Enclosure Services (EncServ) – Returned as 0, indicating an enclosure services component is not
included.
Bar Code (BarC) – For Media Changer logical units, this field returns a 1, indicating a bar code scanner or
imaging device is installed (also returned in byte 55 below). For the Controller logical unit, this field returns
a 0.
Multi Port (MultiP) – Returned as 0, indicating that this is not a multi-port device.
Media Changer (MChngr) – This field returns a 0, indicating it is not an attached media changer device.
Wide SCSI Address 16 (Addr16) – Returned as 1, indicating 16-bit wide SCSI addresses are supported
(applies to parallel SCSI only).
Relative Address (RelAdr) – Returned as 0, indicating relative addressing is not supported.
Wide Bus 16 (Wbus16) – Returned as 1, indicating 16 bit transfers are supported (applies to parallel SCSI
only).