Tableau TD2u, User Manual

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Troubleshooting Common Problems
This section provides the following troubleshooting issues and solutions:
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Power supply issues
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Problems with disk detection
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Replacing the backup battery for the real-time clock
Power Supply Issues
The TP5 power supply provided with the TD2u, when used with the appropriate adapter for
the TD2u, is a 15-volt power supply that uses a barrel connector to interface with the TD2u. It is
capable of powering the TD2u and nearly all combinations of one, two, or three SATA hard
disks. The TD2u also employs staggered power sequencing for the source and destination hard
disks. With staggered sequencing, power is first provided to one hard disk as it spins up, then
to the second hard disk as it spins up, and finally to the third hard disk. It is normal to hear the
source and destination drives spin up separately.
There is a green DC power LED on the rear edge of the TD2u, next to the female DC power
barrel connector. If the TP5 power supply is connected properly to the TD2u and to AC power,
the green LED illuminates. If you are having difficulty turning the TD2u on, check the status of
the DC power LED to ensure that the TD2u is receiving power from the TP5 power supply. The
LED will continue to blink if the DC power voltage is too high or low.
Problems with Disk Detection
When using a product like the TD2u, the most common problem users encounter is a failure to
achieve drive detection. Most drive detection problems are the result of improper cabling. The
following table lists the most common drive detection problems and corrective actions.
Problem Corrective Action
Hard disk does not
spin up
Check the power connection between the TD2u and the hard disk. Be
especially careful to ensure that the 4-pin power connectors are prop-
erly seated in the connectors on the TD2u and on the hard disk (if
using cable model TC2-8). The power and signal connectors should
be fully inserted, not loose, in the TD2u and hard disk.
TD2u does not
detect IDE hard
disk
IDE hard disks should be set for Master or Single Drive.
CHAPTER 4 Troubleshooting and Support 61