3. Operational Overview
15
Ziatech recommends that you FDISK and FORMAT the disk in order to avoid any
ambiguity with this issue.
How do I install a second drive to the system?
For ZT 8952-X users (for example, ZT 8952-40) it is not possible to install a second
drive because the system lacks a cable mechanism.
For ZT 8953-X users (for example, ZT 8953-50) a number of modifications are needed.
A new power cable must be extended to the second drive. Jumpers on the existing drive
must be changed from default for setup as master, and on the new drive for setup as
slave. These jumpers differ depending on the drive manufacturer. We recommend that
you contact Ziatech for drive-specific configurations for a two-drive system.
In general, a higher capacity drive is more cost effective than two drives in a
master/slave arrangement. A single drive will generally require less power and have a
better Mean Time Between Failure.
The ZT 8952 does not work with my old revision (prior to Rev. A.2) ZT 8950 Floppy
Disk Controller. Why?
Since the ZT 8952 and ZT 8950 share I/O register 3F7h, the ZT 8950 was revised to
A.2 to allow correct operation with the ZT 8952. Be sure your ZT 8950 is Revision A.2 or
greater.
I recently received revision 0.2 boards with a new jumper that was not present on
revision 0 or 0.1 boards. What is W15 for?
W15 adds the capability to drive INTRQ3* on the STD 32 backplane. Your ZT 8902 or
ZT 8911 processor board uses INTRQ3* by default for the hard disk interrupt.
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