Quantum LTO 4, User Manual

Page: 152 / 297

SCSI Commands: 31BREAD BUFFER Page 144
3.19.6 MAM Page Definitions
The following section details the pages available in the MAM. Refer to the relevant
Ultrium specification documents for the current MAM data. An Ultrium specification
exists for each media generation.
3.19.6.3 MAM Pages
The table below shows the Page ID used to identify each page within the MAM.
Note that a Page ID of 0xFFFFFF is used when reading the entire MAM. The MAM
size is 8 KB for LTO4 cartridges and 4 KB for LTO1, LTO2 and LTO3 cartridges.
An optional page will not exist unless the drive has preformed an operation that
requires information be stored to that optional page. A READ BUFFER command to
an optional page that has not been created will result in a check condition LUN NOT
READY AUXILIARY MEMORY NOT ACCESSIBLE.
Page ID Access Description
FFFFFFh RO All pages.
001h RO Cartridge Manufacturer’s Information
002h RO Media Manufacturer’s Information (optional)
0F0-0FFh RO Drive Manufacturer Support (Quantum cleaning Cartridge only)
0FFh RO Universal Drive Support (Universal Cleaning Cartridge only)
101h RO Initialization Data
102h RO Tape Write Pass
103h RO Tape Directory
104h RO EOD Information
105h RO Cartridge Status and Tape Alert Flags
106h RO Mechanism Related (optional)
107h RO Suspended Append Writes
108-10Bh RO Usage Information (optional)
10Ch RO Fatal Error Usage / WORM Fatal Error Usage (LTO3 and later)
10Dh RO Cartridge Content (LTO4)
1FC-1FFh RO Cleaning Usage Information (optional, cleaning tape only)
200h RW Application Specific (optional)
3.19.8 READ BUFFER Completion Status
Code Message Description
00h Good
Status
•
The drive is ready to perform any appropriate command.
•
The drive remains in any previously set mode.
•
The tape position is not changed.
02h Check
Condition Use the REQUEST SENSE command to retrieve status information. Possible
Sense Keys are:
Code Message Description
04h Hardware Error Drive hardware failure detected.
05h Illegal Request The Command Descriptor Block is invalid.
06h Unit Attention The cartridge was changed or the drive was
reset prior to this command.