HP 220mx Guia do Utilizador descarregar pdf (Página 128)

SCSI-2 Drive Command Set

Write and Verify (Group 1) Command (2EH)

Chapter 2 2-91

SCSI-2 Drive Commands

DPO A Disable Page Out bit of 1 instructs the target not to

store the data in the cache after it has been transferred

to the optical disk.

A DPO bit of 0 instructs the target to store the data in

the cache after it has been transferred to the optical

disk.

This bit is ignored.

EBP An Erase By-Pass bit of 0 indicates an erase

automatically performs before writing the data.

An EBP bit of 1 suppresses the erase operation.

Transfer

Length The Transfer Length field specifies the number of

contiguous logical blocks of data to be transferred for

this command. A value of 0 indicates that no blocks will

be transferred and is not considered an error.

PBA A Physical Block Address bit of 1 indicates that physical

block addressing is used.

A PBA bit of 0 indicates that logical block addressing is

used.

ErsCntl The Erase Control bit is identical to the Erase Bypass

bit.

Rel Adr A relative address bit of one indicates that logical block

address specified is a two’s complement offset from the

last logical block address accessed.

A value of 0 indicates that the logical block address is an

absolute address.

NOTE When this command is used with 14X 512 OR 1024 byte/sector media,

setting the ErsCntl bit or the PBA bit will cause the drive to return a

CHECK CONDITION status. The sense key/additional sense code will be

set to ILLEGAL REQUEST/INVALID FIELD in CDB.

1 2 ... 123 124 125 126 127 128 129 130 131 132 133 ... 377 378

Sem comentários

HP 220mx Guia do Utilizador Página 128