Quantum DLT-S4 Guia do Utilizador descarregar pdf (Página 370)

Chapter 4 SCSI Commands

WRITE Command (0Ah)

DLT-S4 Interface Reference Guide 336

Table 190 WRITE Command

Data

— Field Descriptions

Exception Conditions 4 If the drive detects End of Tape (EOT) while writing, it finishes writing

any buffered data. The command terminates with

CHECK CONDITION

status. Within the Sense Data, the EOM field is set, the Sense Key is set to

NO SENSE, and the Additional Sense Code and Additional Sense Code

Qualifier fields are set to

EOM / P DETECTED. The drive attempts to

complete any subsequent writes, returning a

CHECK CONDITION status in

each case.

If the drive encounters the physical EOM when attempting a

WRITE, it

returns a

CHECK CONDITION status. Within the Sense Data, the EOM and

Valid fields are set, and the Sense Key field is set to

VOLUME OVERFLOW.

The Information fields contain the residue count and the Additional

Sense Code and Additional Sense Code Qualifier fields are set to

EOM / P

DETECTED

. The drive physically positions the tape at

EOM / P.

Field Description

Fixed Sets both the meaning of the Transfer Length field.

When set to 0, a single block is transferred from the initiator and is written to the

drive beginning at the current logical tape position. Upon successful termination, the

drive logically positions the tape after this block on the EOM / EOP side. The

Transfer Length specifies the length of block in bytes.

When set to 1, the Transfer Length field specifies the number of blocks to be

transferred to the drive and written to the medium beginning at the current tape

position. This form of WRITE is valid only if the drive is currently operating in fixed-

block mode, as indicated by the Block Size field in the Mode Parameter Block

Descriptor (see Mode Parameter Block Descriptor

on page 104). The current block

length is the block length defined in the

MODE SELECT command. Upon termination,

the drive logically positions the tape after these blocks.

Transfer Length Contains the length of the data transfer in bytes or blocks depending on whether

fixed- or variable-block mode is selected.

When set to 0, no data is transferred and the current position on the drive is not

changed.

1 2 ... 365 366 367 368 369 370 371 372 373 374 375 ... 385 386

Comentários a estes Manuais

Sem comentários

Quantum DLT-S4 Guia do Utilizador Página 370

Comentários a estes Manuais

Manuais e produtos relacionados com Unidades de fita magnética Quantum DLT-S4