Fujitsu MAH3091MC - Enterprise 9.1 GB Hard Drive, Maintenance Manual

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viii C141-E103-01EN
Important
Alert Items
Important Alert Messages
The important alert messages in this manual are as follows:
A hazardous situation could result in minor or moderate personal injury if the
user does not perform the procedure correctly. This alert signal also indicates
that damages to the product or other property
may occur if the user does not
perform the procedure correctly.
Task Alert message Page
Mounting Installation
For MAH and MAJ series, Reed Solomon codes are applied for
their ECC.
The sector-data is divided into 4 interleaving sectors, and ECC is
performed in each sector where the maximum number of errors (up
to 5 byte) can be corrected. [Total maximum byte: 5 byte x 4 (
interleave) = 20 byte]
If the error of read sector keeps allowable error byte number,
correction is performed.
However, if error byte exceeds its allowable number, correction
may not be performed properly.
Data loss
1. The user must not change the setting of terminals not described
in this section. Do not change setting status set at factory
shipment.
2. Do not change the setting of terminals except following setting
pins during the power is turned on.
• Write protect: CN2 9-10
3. To short the setting terminal, use the short plug attached when
the device is shipped from the factory.
Damage
1. Check that system power is off before connecting or
disconnecting cables.
2. Do not connect or disconnect cables when power is on.
Damage
1. Be careful of the insertion directions of the SCSI connectors.
With the system in which terminating resistor power is supplied
via the SCSI cable, if the power is turned on, the overcurrent
protection fuse of the terminating resistor power supplier may
be blown or the cable may be burnt if overcurrent protection is
not provided.
When the recommended parts listed in Table 4.2 are used,
inserting the cables in the wrong direction can be prevented.
2-5
5-5
5-11