Backup Management

157NAS 1000s Administration Guide

■ Server name

■ IP addresses

■ Gateways

■ DNS servers

■ NIS servers

■ User mapping database

■ Storage setup

— Member storage units (LUNs)

— Share names, paths, and access permission settings

This information greatly increases the ability to quickly and accurately recover from

catastrophic failures such as fires, weather disasters, theft, and complete hardware failure.

Snapshots and Quick Online Restores

Persistent Storage Manager (PSM) provides instant data recovery from hundreds of online

snapshots. Once the first snapshot is taken PSM monitors all drive activity retaining the

deleted data required to recreate the last snapshot. Individual files, groups of files, folders,

groups of folders or complete volumes can be restored. Security rights and privileges, as well

as file and directory attributes, remain in effect as they were at the time the snapshot was

created.

Snapshots can be used as a convenient source of data for a backup. There are some

applications that must be stopped before backups are made. A backup requires that the file

system is recorded in a consistent state, where no changes occur during the backup. Because

snapshots are created in a matter of seconds and maintain a consistent view of the file system

from that point on, snapshots can drastically reduce the amount of time applications must be

paused or shut down during backup operations. The NAS device facilitates automatically

creating snapshots at any given time.

Caution: Snapshots should be considered an additional convenience for restores, not a

replacement for tape backup. In the event of disk failures, snapshots can be lost along with

the original data. Snapshots will be automatically deleted without warning by PSM to

regain space when disk space is low.

Although snapshots should never be considered a replacement for regular data backup to

removable media, they can be a highly convenient feature for immediate, tapeless recoveries.

If a file is accidentally deleted or corrupted, it can be recovered quickly by accessing the

snapshot, selecting the file or directory, and copying it back to its original location on the

volume.

To use the snapshot capability for a quick online restore, take a snapshot on a regular basis or

before the source disk is altered. This ensures a backup of all the original files, applications,

and configurations.

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Table des matières

Hoshizaki

IMPORTANT

CONTENTS

I. Specications

A. Icemaker

2. DCM-500BAH-OS

3. DCM-500BWH

4. DCM-500BWH-OS

II. General Information

A. Construction

B. Ice Making Unit

C. Sequence of Operation

1. Startup

2. Shutdown & Restart

3. 12 Hour Drain Cycle

Shutdown & Restart

D. Control Board

1. Control Board Layout

Control Board

E. Float Switch

III. Technical Information

2. DCM-500BWH(-OS)

B. Wiring Diagrams

WIRE COLOR CODE

E. Performance Data

IV. Service Diagnosis

A. Diagnostic Procedure

B. Ice Production Check

C. Diagnostic Charts

2. Low Ice Production

3. Other

4. Dispensing

5. Opti Serve (OS) Sensors

5c. Water Dispensing

Water-Cooled Model Only

VI. Cleaning and Maintenance

B. Maintenance

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