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Article Number: 000023112


Data Domain OS: How to change NFS default option to root_squash in DD OS 5.7

Summary: This article provides a procedure for changing the default NFS parameter from no_root_squash to root_squash. It also provides instructions on how to set the minimum required level to root_squash for all NFS add commands. ...

Article Content


Instructions

This article provides a procedure for changing the default NFS parameter from no_root_squash to root_squash. It also provides instructions on how to set the minimum required level to root_squash for all NFS add commands.

This procedure can ONLY be used on Data Domain systems running the DD OS 5.7 family starting with DD OS 5.7.2.0.

  • Previous releases do not support the required registry changes.

  • Future DD OS family releases will use a different process.

Steps to change the default from no_root_squash to root_squash:   

reg set config_floating.nfs.option.default_root_squash = 1
 

Steps to set the minimum allowable to root_squash:     

reg set config_floating.nfs.option.default_root_squash = 1
reg set config_floating.nfs.option.force_minimum_root_squash_default = 1

 

To view the registry value use:     

reg show config_floating.nfs.option.default_root_squash
reg show config_floating.nfs.option.force_minimum_root_squash_default

Additional Information

Users can change the default NFS behavior from no_root_squash to root_squash. The following two registry options were added in DD OS 5.7.2.0 to allow changing the defaults:    

config_floating.nfs.option.default_root_squash

Setting this registry will make root_squash the default value for all new exports that do not specify either root_squash or no_root_squash at "nfs add" time. The initial value will be 0, indicating no_root_squash, but the value can be changed to 1 to indicate root_squash. 

Note: Unless config_floating.nfs.option.force_minimum_root_squash_default value is set to 1, the user can still override this default behavior at "nfs add" time.

config_floating.nfs.option.force_minimum_root_squash_default

This option will force the minimum allowed root squash behavior if set to 1. If this value is 1, and config_floating.nfs.option.default_root_squash is also 1, the default and only allowable root_squash setting is root_squash (any attempt to change it is made, an error will be given at "nfs add" time). If the value is 1 and config_floating.nfs.option.default_root_squash is 0 (minimum is no_root_squash) or if the value is 0 (do not force minimum), the user can override the desired level of root squash at  nfs add  time.

Article Properties


Affected Product

Data Domain

Product

Data Domain, DD OS

Last Published Date

09 Aug 2022

Version

4

Article Type

How To