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2.0 Drive mounting and configuration
2.1 Handling and static-discharge precautions
After unpacking, and before installation, the drive may be exposed to
potential handling and electrostatic discharge (ESD) hazards. You must
observe standard static-discharge precautions. A grounded wrist-strap is
preferred.
Handle the drive only by the sides of the head/disc assembly. Avoid
contact with the printed circuit board, all electronic components and the
interface connector. Do not apply pressure to the top cover of the drive.
Always rest the drive on a padded antistatic surface until you mount it in
the host system.
2.2 Jumper settings
2.2.1 Master/slave configuration
You must establish a master/slave relationship between two drives that are
attached to a single AT bus. You can configure a drive to become a master
or slave by setting the master/slave jumpers, shown in Figure 2 on page 18.
This drive supports master/slave configuration using the cable select
option. This requires a special daisy-chain cable that grounds pin 28
(CSEL) on one of its two drive connectors. If you attach the drive to the
grounded CSEL connector, it becomes a master. If you attach the drive
to the ungrounded CSEL connector, it becomes a slave. To use this
option, the host system and both drives must support cable select, and
both drives must be configured for cable select. To configure this drive
for cable select, install a jumper as shown in Figure 2.
For the master drive to recognize the slave drive using the DASP– signal,
the slave drive must assert the DASP– signal at power up, and the master
drive must monitor DASP– at power up.
2.2.2 Alternate capacity jumper
Some older computers may “hang” if their BIOS detects a hard drive that
has more than 4,092 cylinders at startup. To allow these computers to
recognize the ST33240A and the ST32531A, this drive includes a
capacity-limiting jumper, which sets the drive’s default translation ge-
ometry to 4,092 cylinders. This limits the drive’s capacity to 2.1 Gbytes,
unless third-party software is used.
Medalist 3240 and Medalist 2531 Product Manual, Rev. A 17