User's Guide

Chapter 2 Emulated Medium Changer SCSI Commands
Read Element Status (B8h)
Quantum DX-Series Software Interface Guide 69
• SValid
• The SValid bit is set to 1 if information in the Source Storage
Element Address field is valid
• If information is unknown (due to a door open or power on
condition) the SValid bit is set to 0
•Invert
The invert field is not supported and is set to 0.
• Source Storage Element Address
The Source Storage Element Address represents the address of the
last storage element that held the cartridge. The SValid field indicates
whether this information is valid.
• Primary Volume Tag Information
If Volume Tag information was requested in the command block
(VolTag = 1), the Primary Volume Tag Information field is included
in the element descriptor. This information is omitted if PVolTag = 0
in the element status page. For format, see
table 43.
• Alternate Volume Tag Information
If the Volume Tag information was requested in the command block
(VolTag=1) and Drive Serialization is enabled (mode page 20h,
SER=1), the Alternate Volume Tag Information field is included in
the element descriptor and includes the drive serial number in an
ASCII text string. The serial number is preceded by four null
characters. For format, see
table 47.
Table 47 Alternate
Volume Tag
Information
Note: For more information on enabling Drive Serialization, see the
Mode Select command Vendor Unique Page 20h, SER bit and
the Mode Sense command, SER bit.
Bit/Byte
7 6 5 4 3 2 1 0
0 - 3
Reserved