HP NonStop G-Series - Manual (Page 210)

Puts the tape process in a state to disallow regular I/O commands to the tape drive. When the Stop
action completes, the tape drive is in the Stopped state.
Note that Stop is a logical command and does not affect the hardware.
Switch Process Pair
Switches processors of the primary and backup tape I/O processes.
Test Extended
Tests vary depending on the type of tape drive. This table lists the actions performed for each
supported tape device (listed by Product ID).
Product ID Actions Performed
CT9840
N/A (The action can be initiated, but it will perform the same tests done by the Test
Verify action.)
T514x
Data loopback test
Drum motor test
Servo interface loopback test
T515x
POST
ROM EDC verified
Queuing and enqueuing
Loader software reset
T517x N/A
T519x Loop write-to-read. No tape (media) is required.
T9490
Microprocessor library internal loopback test
Servo processor self-test
Servo processor RAM test
The tape drive must be in the Stopped state to perform this action.
Test Verify
Runs the power-on self-test for the tape drive. Additionally, runs tests to isolate problems involving
the tape drive, SAC, or Common Base Board. The tape drive must be in the Stopped state to perform
this action.