ULTRASTOR ULTRA 12F, Installation Manual

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3.1 ESDI Drive Configuration
The ESDI drive should be configured as follows:
a. Verify and set the drive select jumper on the drive as follows:
1. If a straight 34 pin control cable is used, jumper the first drive as drive
select 1, and jumper the second drive as drive select 2.
2. If a twisted 34 pin control cable is used, jumper the first drive as drive
select 2, and jumper the second drive also as drive select 2.
Note: A twisted 34 pin control cable is a 34 pin flat ribbon
cable which has wires 25 through 29 twisted at one end of
the cable.
b. Install the drive termination resistors only on the drive that is at the end of
the control cable.
c. Set the jumper to spin up the drive motor upon system power up rather
than upon an ESDI spin-up command; generally the drive will come from
the factory set to spin up upon power up.
d. Set the drive jumper for hard sector mode. This is essential if the drive is to
function properly with your high performance ULTRA controller.
e. Set the desired sectors per track jumper. For 10MHz ESDI drives it is
normally 36 sectors or below, for 15 MHz ESDI drives, 54 sectors or
below per track depending on the drive. Make sure you select an option
which uses 512 byte sectors.
3.2 Controller Jumper Configuration
Refer to Figure 1.0 for the board layout showing jumper locations on the board.
Table 1.0 shows default factory jumper settings, and Table 2.0 shows controller
jumper definitions.
Reference Manual Page 5