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DP2 FCHECK User’s Guide August 25, 2005

Hewlett-Packard Development Company L.P.

NTL Support and Service Library

DP2 FCHECK User’s Guide

1. Introduction

FCHECK is a Guardian program that checks the internal consistency of

Disk Process 2 (DP2) structured files. It does not correct any of the

structural problems it finds.

You can use FCHECK to verify the consistency of standard (Format 1) and

large (Format 2) files.

Note: The older DP2 tool, FILCHECK, does not work on Format 2 files.

After you install G06.24, you can also use FCHECK to:

o Validate mirrored drive consistency. You can use the –SCAN option

to verify the checksum of the source and target drives and to

ensure that the data on both drives of the mirrored pair is the same.

If one of the drives has a valid checksum and the other drive has an

invalid checksum, the –SCAN option automatically copies the data

with the valid checksum to the drive with the invalid checksum.

o Determine the space requirement for migrating data from internal,

514-sector volumes to 512-sector volumes. Before initiating a

migratory revive, use the –SIZE option to report the current space

used on the volume and the amount of space required to migrate

the data to ensure that a disk drive in an Enterprise Storage System

(ESS) or Fibre Channel disk drive enclosure is properly sized. If space

is not sufficient, the migratory revive will abort.

FCHECK validation is actually performed in DP2. FCHECK drives the

validation and reports the errors.

You can run FCHECK concurrently with any application. The DP2 volume

process performs data validation. As a result, application activity does

not interfere with consistency checks.

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Sommario

Pagina 1 - DP2 FCHECK User’s Guide

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 1 of 13 NTL Support and Service Library DP2 FCHECK Use

Pagina 2

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 10 of 13 NTL Support and Service Library An FCHECK summ

Pagina 3

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 11 of 13 NTL Support and Service Library 9. Detailed

Pagina 4

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 12 of 13 NTL Support and Service Library For a broken B

Pagina 5 - –SIZE Option

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 13 of 13 NTL Support and Service Library FCHECK –SCAN

Pagina 6

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 2 of 13 NTL Support and Service Library This user guid

Pagina 7 - Compare 313

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 3 of 13 NTL Support and Service Library 2. Data Scru

Pagina 8

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 4 of 13 NTL Support and Service Library This scan is pa

Pagina 9 - 8. FCHECK Output

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 5 of 13 NTL Support and Service Library 4. FCHECK –SI

Pagina 10

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 6 of 13 NTL Support and Service Library 5. FCHECK Syn

Pagina 11

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 7 of 13 NTL Support and Service Library 6. Disk Scan

Pagina 12

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 8 of 13 NTL Support and Service Library 7. Structured

Pagina 13

DP2 FCHECK User’s Guide August 25, 2005 Hewlett-Packard Development Company L.P. 9 of 13 NTL Support and Service Library 8. FCHECK Out

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