HP 220mx Guia do Utilizador descarregar pdf (Página 177)

100

101

SCSI-2 Drive Command Set

Verify (Group 5) Command (AFH)

Chapter 22-140

Verify (Group 5) Command (AFH)

This command verifies the data starting from the specified logical block

address by checking the error correction code.

This command has two modes of operation, depending on the value of the

BV bit. If the Blk Vfy bit is set to 0, it verifies previously written data

integrity starting at the specified Logical Block Address by reading the

data and checking the Error Correction Code. The verification threshold

is set to approximately half of the error correction capability.

Table 2-126 Verify (Group 5) CDB

Byte 7 6 5 4 3 2 1 0

0 Operation Code (AFH)

1 Logical Unit Number

(0)

DPO Rsvd

(0)

Blk

Vfy

Rsvd

(0)

RelAdr

2 Logical Block Address (MSByte

3 Logical Block Address

4 Logical Block Address

5 Logical Block Address (LSByte)

6 Verification Length (MSByte)

7 Verification Length

8 Verification Length

9 Verification Length (LSByte)

10 Reserved (0)

11 Reserved (0) Flag Link

1 2 ... 172 173 174 175 176 177 178 179 180 181 182 ... 377 378

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