Seagate Technology 10002475-003, Руководство по описанию продукции

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ATAPI Interface Chapter 5
Product Description Manual Page 47
Mode Block Descriptor
The Block Descriptor is returned to the MODE SENSE command unless the
DBD bit in the command packet is set to one. If the Block Descriptor is not sent,
the Block Descriptor Length field (in the Mode Parameter Header) is 0.
Byte Description Value Meaning
4 Density Code NN Current Density
5-7 Number of Blocks 000000h Zero
8 Reserved 00h —
9-11 Block Length 000200h Always 512 byte blocks
The Number of Blocks is 0, indicating that all blocks in the media match this
descriptor, (the blocks are fixed 512 byte blocks).
None of the Block Descriptor parameters may be changed (Block Length is
fixed).
Mode Medium Partition Page
The following table describes the Mode Medium Partition Page layout.
Byte Description Value Meaning
0 Page Code 11h Medium Partition Page
1 Page Length 06h 6 Bytes of Information
2,3 Maximum Additional Partitions,
Additional Partitions Defined 00h,00h Not Supported
4 FDP (bit 7), reserved 80h Fixed Data Partitions
5 Medium Format Recognition 03h Format and Partition Recognition
6,7 Reserved 00h,00h —
None of the Medium Partition Page (11h) parameters can be changed.
Mode Capabilities and Mechanical Status Page
The following table describes the Mode Capabilities and Mechanical Status
Page layout.
Byte Description Value Meaning
0 Page Code 2Ah Capabilities and Mechanical Status Page
1 Page Length 12h 18 Bytes of Information
2,3 Reserved 00h,00h —
4 SPREV (bit 5), RO (bit 0) 20h Space Reverse supported, bit 0 = Write
Protect status
5 QFA (bit 5) 20h QFA supported
6 ECC (bit 6) 40h ECC supported
7 BLK1024 (bit 1), BLK512 (bit 0) 03h 512 byte blocks (1024 if floppy tape)
8,9 Maximum Speed Supported (KBps) 600. 600 KBytes/sec Maximum
10,11 Maximum Stored Defect List
Entries 0000h —
12,13 Continuous Transfer Limit (blocks) 0034h 52 blocks per Read/Write command
14,15
Current Speed Selected (KBps) NNNN Current transfer rate
16,17 Buffer Size (in 512 bytes) 02D8h 14 frames of 52 blocks = 728
18-19 Reserved 00h —