
14-4
SCSI REFERENCE 1014826
CHAPTER 14—READ BUFFER (3Ch)
Buffer Capacity – Bytes 01 through 03
The Buffer Capacity field specifies in bytes the storage available in the buffer
for reading and writing.
14.4 EXCEPTIONS AND ERROR CONDITIONS
If a hardware or SCSI bus error occurs while the data is being transferred from
the library to the initiator, the library terminates the command and returns
Check Condition status. The sense key is set to Aborted Command (Bh). If this
occurs, retry the operation.
14.5 COMMAND STATUS
The library returns a status byte after processing the READ BUFFER
command. This section describes when each type of status byte might be
returned.
Good
The library returns Good status when it is able to process the command
without errors.
Busy
Busy status indicates that the library is temporarily unable to accept a
command from this initiator. The initiator may retry the command later.
Reservation Conflict
The library returns Reservation Conflict status when it is reserved by a
different initiator. See Chapter 20 for more information about the RESERVE
command.
Check Condition
The library returns Check Condition status for the following reasons:
The command was issued to an invalid LUN.
A Unit Attention condition is pending for the initiator.
A parameter in the CDB is invalid (see Table 14-1 for sense data).
Value Mode Description
80h
001b Read data from Firmware EPROM
010b Read data from Diagnostic Data
011b
Read Offset and Buffer length information
for Diagnostic Data (see table above)
Comentarios a estos manuales