Digital Equipment RRD42, Руководство пользователя

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2–4 Generic Installation
Mode Select
Jumper IMPORTANT
The mode select jumper is a USER-SELECTABLE feature
for the embedded drive only. If you do not select the
correct mode, the drive does not operate properly.
The mode select jumper has two modes:
Mode 0 — Jumper Out. In this mode the drive block size
is 2 kilobytes. Use Mode 0 under MS–DOS and SCO UNIX
operating systems.
Mode 1 — Jumper In. When the jumper is installed, the
drive operates with a block size of 512 bytes. Use Mode 1
under VMS and ULTRIX operating systems.
The mode select jumper does not affect other operations.
NOTE
The microcode revision reported by the RRD42 disc
drive depends on the mode selected.