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ibrix_datavalidation

Performs a data validation scan of a file system or subdirectory.

Description

To ensure that WORM and retained files remain unchanged, it is important to run a data validation

scan periodically. Circumstances such as the following can cause a file to change unexpectedly:

• System hardware errors, such as write errors

• Degrading of on-disk data over time, which can change the stored bit values, even if no data

is accessed

• Malicious or accidental changes made by users

A data validation scan computes hash sum values for the WORM, WORM-retained, and

WORM-hold files in the scanned file system or subdirectory and compares them with the values

originally computed for the files. If the scan identifies changes in the values for a particular file,

an alert is generated on the GUI. You can then replace the bad file with an unchanged copy from

an earlier backup or from a remote replication.

NOTE: Validation can only be run on file systems that are enabled for data retention. Only

WORM and WORM-retained files, including files under legal hold, are validated. Normal files

are not validated.

A legal hold locks the file and the data retention policy in place on the file system will be ignored.

For example, the expiration time does not apply to the file. A file can only be set to legally held

by command line. The file is then held WORM-retained until the legal hold is removed and then

the normal retention settings take effect.

The time required for a data scan depends on the number of files in the file system or subdirectory.

If there are a large number of files, the scan could take up to a few weeks to verify all content on

storage. A scheduled scan will quit immediately if it detects that a scan of the same file system is

already running.

A unique validation summary report is generated for each scan. The reports are located in the root

directory of the file system at {filesystem root}/.archiving/validation/history.

The report files are named <ID-n>-sum, such as 1-0.sum, 2-0.sum, and so on. The ID is the

task ID assigned by StoreAll software when the scan was started. The second number is 0 unless

there is an existing summary report with the same task ID, in which case the second number

increments to make the filename unique.

NOTE: The StoreAll .archiving directory does not appear when you run the ls -a command

on the root directory of the file system; however, it is visible when you cd into the directory and

use the ls -a command. Also, Linux commands such as cp work correctly when .archiving

is in a path or filename used in the command.

Synopsis

Perform a validation scan on the specified file system or subdirectory:

ibrix_datavalidation -s -f FSNAME [-d PATH]

Options

DescriptionOption

Specifies a subdirectory.-d PATH

Specifies a file system.-f FSNAME

52 StoreAll software commands

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