Seagate ST3390N Guía de instalación descargar pdf (Pagina 382)

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19-6 Common disk subsystem problems

Data loss and disk replacement

Standard 1.0 Modular Option EC Installation and Maintenance Guide November 1999

Data loss and disk replacement

Introduction

When a disk fails and needs to be replaced, the following

backups can limit data loss:

• A tape backup may have been performed prior to the

failure.

• A tape backup can often be made after the failure.

Tape backups

A system relies on tape backups to reduce data loss during disk

replacement.

If the disk to be replaced is still readable, perform a tape backup

to capture as much of the current data as possible.

The backup utility attempts to run to completion in spite of disk

errors. It is likely that the contents of a number of disk blocks

are unrecoverable.

The loss of a small number of blocks may result in minor

operational problems for Meridian Mail, such as corruption of

some messages or mailboxes. However, damage to critical areas

can cause a system malfunction.

Replace the disk and restore the backup made after failure onto

the new disk. If the system malfunctions afterwards, restore the

data from the most recent backup made before the disk failure.

CAUTION

Risk of data loss

Never back up over an existing good

backup, as the data on the disk may now

be corrupted, and you may destroy useful

information.

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Seagate ST3390N Guía de instalación Pagina 382

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