Seagate ST31230N/ND Guia de Instalação descarregar pdf (Página 257)

Common disk subsystem problems 17-7

Data loss and disk replacement

Standard 1.0 Option 11 EC Installation and Maintenance Guide November 1999

Data loss and disk replacement

Tape backups

When a disk fails and needs to be replaced, a number of

mechanisms exist to limit data loss:

• A tape backup may have been performed prior to the

failure.

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

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 in order to capture as much of the

current data as possible.

The backup utility attempts to run to completion in spite of

disk errors. When this happens, it is likely that you will be

unable to recover the contents of a number of disk blocks.

The loss of a small number of disk 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 afterward,

restore the data from the most recent backup done prior to the

disk failure.

CAUTION

Risk of data loss

Never back up over an existing good

backup tape, as the data on the tape may

now be corrupted and you may destroy

useful information.

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Seagate ST31230N/ND Guia de Instalação Página 257