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MODE SELECT
The MODE SELECT parameter list has the following format.
Bit
7
Byte
0
1
2
Reserved
3
4
5
(MSB)
6
7
8
9
(MSB)
10
11
Bit
7
Byte
0
1
2
3
Reserved
4
5
6-7
8
9
(MSB)
10
11
12
13
(MSB)
14
15
Buffered Mode: Buffered Mode is the mechanism by which the drive implements Immediate Reporting on WRITE
commands.
If the field is ZERO, then the drive does not report a GOOD status on WRITE commands until the data blocks are
actually written to tape (not support).
If the Buffered Mode field is one, then the drive reports GOOD status on WRITE commands as soon as the data
block has been transferred to the buffer. This field will be set to ONE.
Speed: The drive only supports one speed, the default speed. Because of this, this field must be set to ZERO. Any
other value will cause a CHECK CONDITION status with an ILLEGAL REQUEST sense key to be returned.
Block Descriptor Length: This specifies the length in bytes of all the block descriptors. Since the drive only
allows one block descriptor, this value must be eight. Any other value will cause a CHECK CONDITION status with
an ILLEGAL REQUEST sense key to be returned.
Note: The block descriptor specifies the media characteristics for the SDX drive. The block descriptor contains the
density code, number of blocks and block length fields.
SONY AIT-5 drive SDX-1100V series Ver.1.0
Table 6-38: MODE SELECT (6) parameter list
6
5
4
Buffered Mode (001b)
Block Descriptor Length (0008h)
Density Code
Number of Blocks (00 00 00h)
Block Length
Table 6-39:MODE SELECT (10) parameter list
6
5
4
Buffered Mode
Reserved
Block Descriptor Length (08h)
Density Code
Number of Blocks (00 00 00h)
Block Length
3
2
Reserved
Reserved
Speed (00h)
Reserved
3
2
Reserved
Reserved
Reserved
Speed (00h)
Reserved
Reserved
6.Command Specification
1
0
(LSB)
(LSB)
1
0
LONGLS
A (0)
(LSB)
(LSB)
6-41
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