User`s guide

SET DW
(DW)
Sets the DW disk handler (RDxx disks).
Format
SET DW condition
Condition
RETRY=n
Specifies the number of times the device handler attempts to recover from an I/O
error. The value n must be an integer in the range 1 through 127. The default
value for n is 8.
SLOT=n
(Valid only with the PRO Expander) Assigns a copy of the DW handler to the
controller for the PRO Expander RD5x card slot n. See the following description
for an explanation of how to do this.
[NO]SUCCES
(Valid only with error-logging support) SUCCES, the default, logs successful I/O
transfers as well as errors when running the Error Logger. NOSUCCES logs
only I/O errors.
[NO]WCHECK
WCHECK verifies output to DW disks by reading data after writing it to the
disk. NOWCHECK does not verify output to DW disks.
[NO]WRITE
WRITE write enables DW disk drive unit 0. NOWRITE write locks DW disk
drive unit 0. NOWRITE affects both the memory copy and the disk file of the
handler.
Description
Support for the PRO Expander
The PRO Expander lets you add one additional RD5x controller and hard disk to a
CTI Bus-based processor configuration. RT–11 supports the PRO Expander in the
following manner.
The DW handler supports only a single device connected to a single controller.
Therefore, to support the second controller and hard disk, you must COPY the DW
handler to another handler name (for example, DV) and use a SET command to
assign the created handler (DV) to the second device.
228 RT–11 Command Descriptions