About using FSAUtility with EMC Celerra/VNX placeholders

Article:HOWTO74985  |  Created: 2012-03-31  |  Updated: 2013-07-12  |  Article URL http://www.symantec.com/docs/HOWTO74985
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About using FSAUtility with EMC Celerra/VNX placeholders

Read this section if you want to use FSAUtility with placeholders on EMC Celerra/VNX volumes.

FSAUtility can use either of the following methods to identify a placeholder on an EMC Celerra/VNX device:

  • A Windows API call. This method is efficient, but it cannot identify placeholders on DART 5.5 volumes if the Celerra's backup mode is set to passthrough.

  • A Celerra/VNX HTTP API call. This method identifies placeholders correctly, regardless of the Celerra/VNX configuration. However, this method is more resource intensive than using the Windows API call.

Table Table: FSAUtility options' default API call for detecting Celerra/VNX placeholders lists the API call that FSAUtility uses by default with each of its placeholder-related options.

Table: FSAUtility options' default API call for detecting Celerra/VNX placeholders

Option

FSAUtility parameter

Default API call for detecting Celerra/VNX placeholders

Bulk recall of files corresponding to placeholders

FSAUtility -b

Windows API call

Recreate placeholders

FSAUtility -c

Windows API call

Move placeholders and their corresponding files

FSAUtility -m

Windows API call

Delete orphaned placeholders

FSAUtility -o

Windows API call

Migrate placeholders

FSAUtility -pm

Celerra/VNX API call

Note that by default FSAUtility with the -pm parameter uses the Celerra/VNX API call. This default helps to ensure that placeholder migration always succeeds, regardless of the Celerra/VNX configuration. If you use FSAUtility -pm with any supported Celerra/VNX configuration other than DART 5.5 with passthrough backup mode, you may want to change the setting for this option to use the more performance-efficient Windows API call.

With the other placeholder-related parameters (-b, -c, -m, and -o) FSAUtility uses the efficient Windows API call by default. However, these commands fail by default for a DART 5.5 volume if the Celerra device's backup mode is set to passthrough.

If you want to use FSAUtility with -b, -c, -m, or -o on DART 5.5, you must do one of the following:

  • Ensure that the Celerra backup mode is set to offline, not passthrough.

  • Or configure FSAUtility to use the Celerra/VNX API call.

You can configure the API call that FSAUtility uses for each placeholder-related option by editing the FSAUtility.exe.config file.

See Configuring which API call FSAUtility uses to identify Celerra/VNX placeholders.

See Example FSAUtility.exe.config file settings

See About FSAUtility

See Running FSAUtility

See Recreating placeholders

See Moving placeholders and corresponding files

See Migrating placeholders

See Deleting orphaned placeholders

See Recalling files corresponding to placeholders


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Article URL http://www.symantec.com/docs/HOWTO74985


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