Quantum LTO 4, Руководство пользователя

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SCSI Commands: 53BWRITE BUFFER Page 223
3.41.2 Echo Buffer
Mode 0Ah will cause data to be written to the echo buffer. Data shall be sent
aligned on four-byte boundaries. The Buffer ID and Buffer Offset fields are ignored
in this mode. The capacity of the echo buffer may be determined by the Buffer
Capacity field in the READ BUFFER echo buffer descriptor.
3.41.3 WRITE BUFFER Data Header
If the Mode field is set to 00h, then the data sent must be preceded by a 4 byte
WRITE BUFFER Data Header. The following table shows the fields in the WRITE
BUFFER Data Header.
Byte Bits
7 6 5 4 3 2 1 0
0 Reserved
1 Reserved
2 Reserved
3 Reserved
3.41.3.1 WRITE BUFFER Data Header Field Descriptions
Field Bytes Bits Description
Reserved 0-3 All bits are 0.
3.41.4 WRITE 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 is invalid, the
transfer length exceeds the maximum, or the
microcode file is invalid.
06h Unit The cartridge was changed, or the drive was
reset prior to this command. Microcode
image has been changed.
0Bh
Aborted
Command Firmware update aborted because the new firmware image Digital
Signature Validation failed.