Seagate STT8000A - Manual (Page 54)

Chapter 5 ATAPI Interface
Page 46 STT8000A Product Manual
Tape Capacity Page Code
The following table presents the Tape Capacity Page layout.
Byte Description Value Meaning
0 Page Code 31h Tape Capacity Page
1 Reserved 00h -
2,3 Page Length 00,20h 32 Bytes Following
4,5 Parameter Code 0001h Remaining Capacity, Part 0 Code
6 Parameter Bits 40h Device Controlled Counter
7 Parameter Length 04h 4-byte Counter
8-11 Remaining Capacity, Partition 0 Value N,N,N,N
12-15 Parameter: Code, Bits, Length 0002h,
40h,04h
Remaining Capacity, Part 1 Code
16-19 Remaining Capacity, Partition 1 Value N,N,N,N
20-23 Parameter: Code, Bits, Length 0003h,
40h,04h
Maximum Capacity, Part 0 Code
24-27 Maximum Capacity, Partition 0 Value N,N,N,N
28-31 Parameter: Code, Bits, Length 0004h,
40h,04h
Maximum Capacity, Part 1 Code
32-35 Maximum Capacity, Partition 1 Value N,N,N,N
The Remaining Capacity for non-current partitions shall be the same as the
Maximum Capacity for that partition. Capacities are multiplied by 1024 to determine
the number of bytes. These values are conservative estimates.
The Parameter bit, TSD (not shown), is zero implying that the drive can save
parameters across resets, etc. Parameters are not saved but are re-computed
correctly from any logical position, regardless of the previous states of the tape
drive.