Ensoniq's Response

The following response from Ensoniq appeared in the November, 1989 issue of the Transoniq Hacker.
Regarding Arthur Entlich's article on changing Mirage disk drives:

Each disk drive used during the production of the Mirage is clearly labeled - you do not need to remove the aluminum plate. The following chart contains the status of each disk drive used during the production run of the Mirage.

Label
Status
SHUGART SA300
EPSON SPM-3924
PANASONIC JU324
PANASONIC JU364
PANASONIC JU254
 Single-sided
Single-sided
Single-sided
Single-sided
Double-sided

NOTE: The following important information is specific to DSK-8's with Shugart disk drives.

There was a jumper that was cut at connector J1 on the DSK-8 mainboard. This jumper disconnected pins 10 and 16 of J1. If a Shugart drive is replaced with a different drive, this jumper must be shorted. Some mainboards did not have the jumper, in this case pins 10 and 16 of connector J1 must be hard-wired underneath the connector.

Ensoniq does not suggest that end users open their Mirages. All technical work should be performed at an Authorized Repair Station.