Specifications

ATAPI For Streaming Tape QIC-157 Rev B

Table 6-42 Key for 5.25" cartridges:

Code Meaning

A 2nd and 3rd EOT holes

B 1st and 2nd EOT holes

C early warning hole to 1st EOT hole

D load point hole to 3rd BOT hole

E 2nd BOT hole to 3rd BOT hole

F 1st BOT hole to 2nd BOT hole

G load point hole to 4th BOT hole

H 3rd BOT hole to 4th BOT hole

I octal hole pattern on cartridge

Table 6-43 Key for 3.5" cartridges:

Code Meaning

A 1st BOT hole to 2nd BOT hole

B 2nd BOT hole to 3rd BOT hole

C 3rd BOT hole to load point hole

D early warning to 1st EOT hole

E 1st EOT hole to 2nd EOT hole

F 2nd EOT hole to 3rd EOT hole

G five bit binary number describing hole pattern

Table 6-44 Device-Specific Parameter

Bit 7 6 5 4 3 2 1 0

WP Buffered Mode Speed

For the MODE SENSE command, a write protect (WP) bit of zero indicates that the medium is write

enabled. A WP bit of one indicates that the medium is write protected. For the MODE SELECT

command, this field is ignored.

The Buffered Mode has only one valid value. A value of 1h, the default mode, indicates a write

operation will be buffered. All other values are reserved.

Table 6-45 Speed Field Assignments

0h Default (Use the peripheral Device's default speed).

1h Use the peripheral Device's lowest speed.

2h - Fh Use increasing peripheral Device speeds.

Implementor's Note: It is recommended that the default value for the speed field be 0h. This is the

minimum support required. Note that the default speed should consider the Device characteristics, the

cartridge specifications, and the tape format.

For the MODE SELECT command, the density code field indicates the density selected by the Host

for use in subsequent read and write operations. For Devices capable of automatic density recognition,

the density code selected by the Host may be overridden by the Device for a subsequent read

operation if the selected value does not match the current recorded density of the medium.