Seagate STT8000A Tape Capacity Page Code, Following table presents the Tape Capacity Page layout

Chapter 5 ATAPI Interface

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,	Remaining Capacity, Part 1 Code
		40h,04h
16-19	Remaining Capacity, Partition 1 Value	N,N,N,N
20-23	Parameter: Code, Bits, Length	0003h,	Maximum Capacity, Part 0 Code
		40h,04h
24-27	Maximum Capacity, Partition 0 Value	N,N,N,N
28-31	Parameter: Code, Bits, Length	0004h,	Maximum Capacity, Part 1 Code
		40h,04h
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.

Page 46 STT8000A Product Manual