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26 read long command, 27 write long command – FUJITSU MCJ3230SS User Manual

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4.3 SCSI Commands

C156-E224-01EN

4-41

4.3.26 READ LONG command

Table 4.71 READ LONG command

Bit

Byte

7

6

5

4

3

2

1

0

0

Operation Code (3Eh)

1

LUN

Reserved

2-5

Logical Block Address

6

Reserved

7-8

Byte Transfer Length

9

Reserved

The READ LONG command reads data in the data, CRC, and ECC sections from
the specified logical block address.

The length of the transfer data must be a multiple of 600 (258h) bytes for 512-byte
media and a multiple of 2380 (94Ch) bytes for 2048-byte media.

4.3.27 WRITE LONG command

Table 4.72 WRITE LONG command

Bit

Byte

7

6

5

4

3

2

1

0

0

Operation Code (3Fh)

1

LUN

Reserved

2-5

Logical Block Address

6

Reserved

7-8

Byte Transfer Length

9

Reserved

The READ LONG command writes data in the data, CRC, and ECC sections from
the specified logical block address.

The length of the transfer data must be a multiple of 600 (258h) bytes for 512-byte
media and a multiple of 2380 (94Ch) bytes for 2048-byte media.