6.0 HP StorageWorks X9000 File Serving Software CLI Reference (TA768-96040, October 2011)

ibrix_datavalidation
Performs a data validation scan of a file system or subdirectory configured for data retention
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 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.
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 X9000 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 is
incremented to make the filename unique.
Synopsis
Perform a validation scan on the specified file system or subdirectory:
ibrix_datavalidation -c -f FSNAME [-d PATH]
Options
DescriptionOption
Performs a validation scan.-c
Specifies a subdirectory.-d PATH
Specifies a file system.-f FSNAME
Shows the usage for this command.-?
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