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Chapter Objectives
Block Transfer Emulation
Status Word
Block Transfer Emulation
Instructions
This chapter contains the header and data configurations that you
need to set up the data files for the block transfer emulation
instructions. The header and data values depend on the operation
you want to perform.
When an operation is unsuccessful, header word 2 of the drive
response contains a negative value (bit 15 = 1).
In most cases, the drive also returns a status word to indicate the
reason for the failure. The location of the status word is typically
header word 4 in the drive response, but will depend on the message.
The following are valid status codes:
Value
0
No error occurred.
The service failed due to an internal reason, and the drive could not perform
1
the request (some messages are read only or write only).
2
The requested service is not supported.
3
An invalid value in the block transfer emulation request header word 2.
4
An invalid value in the block transfer emulation request header word 3.
5
An invalid value in the block transfer emulation request header word 2.
6
The data value is out of range.
There is a drive state conflict. The drive is in an incorrect state to perform the
7
function. The drive cannot be running when you perform certain functions.
Chapter
Description
1203–5.5 September 1995
5
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