Is there overhead in the file system when viewing properties from windows?

Question

We are in process of migrating from one Celerra to another. The issue we are seeing is a mismatch between what the File properties on the drive see's and the file properties on the folders when selected.

For instance we have a share called \\homeserver\shared that share when mapped to a drive letter lets say T: would say it has 500 gigs total and 450 gigs used and 50 gigs free. However when you go inside the T: folder and select all the folders and right click and go to properties it comes back and says it only has 374 gigs of space used. We were wondering if we have a permission error to some files or something else is going on? We are using a domain admin account and that account is also a member of backup operators so should have full access to everyting and no error messges. Does anyone have a clue as to what is going on? Thanks in advance.

lunz3 · Answer

Looks like it may be some kind of bug. Apparently they are having same issue they said they ran some script from the lab to fix it.

https://community.emc.com/message/382524

Intersting though I do not have the fix but curious to know what that might be.

bergec · Answer

As you said it could be ADS, but also permissions. Being a member of backup operators let you bypass permissions as long as you set "backup operator privilege" but Explorer does not set that privilege

Claude

dynamox · Answer

what about from Celerra level (server_df)

lunz3 · Answer

Deduplication is not turned on the file system, neither is quotas.

lunz3 · Answer

Currently we are unable to access to the control station and a service call is open for that.  Could this mismatch have something to do with ADS ( alternative data streams ) ?

dynamox · Answer

do you have dedupe enabled on the file system, if yes , it will skew the numbers reported in explorer

dynamox · Answer

Mac forks ?

Rainer_EMC · Answer

if you arent able to ssh into the control station that needs to be fixed Even if you cant ssh you can still execute CLI commands form UniSphere / Celerra Manager

Rainer_EMC · Answer

the 'drive' properties most likely show the file system stats - i.e. what server_df says It doesnt go through all the files/dirs and counts the usage like directory properties And yes - if you dont have permission to enter a directory you cant count its disk usage As Claude said Backup Operator privilege doesnt mean anything if the application isnt programmed to use it. Even then its very specific and a 'super user' Rainer

Rainer_EMC · Answer

NO – this is specific for quota’s and you said you dont have quotas in use A reliable alternative to count disk usage would be via NFS Rainer

Celerra

Is there overhead in the file system when viewing properties from windows?

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