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SCSI Commands: 31BREAD BUFFER
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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.
Summary of Contents for LTO 4
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