Seagate ST34321A Product Manual - Page 25

Drive mounting and configuration - board

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Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 17 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. 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 be a master or slave by setting the master/slave jumpers, shown in Figure 2 on page 18. These drives support 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 ST38641A, the ST36531A, the ST34321 or the ST33221A, these drives include a capacity-limiting jumper, which sets the drive's default translation geometry to 4,092 cylinders. This limits the drive's capacity to 2.1 Gbytes, unless third-party software is used.

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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. 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 be a master
or slave by setting the master/slave jumpers, shown in Figure 2 on
page 18.
These drives support 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 ST38641A, the ST36531A, the ST34321 or the ST33221A,
these drives include a capacity-limiting jumper, which sets the drive’s
default translation geometry to 4,092 cylinders. This limits the drive’s
capacity to 2.1 Gbytes, unless third-party software is used.
Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B
17