fishermc-woffor

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16 years ago

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May 21st, 2010 12:00

Snapshot missing files

We are using a Celerra NX4. We use Checkpoints for users home directories allowing them to recover deleted files/folders if needed. We have a situation where one user has many files within their folder and they deleted that folder. When using the "Previous Versions" tab under miccrosoft to restore the files within the folder there are NO files to restore. Its like the checkpoints never actually took the snapshot of the files for that particular folder (other folders work fine). Is their anything that would cause a checkpoint to NOT take a snapshot of the files within a folder? The files have been their for months so they have for sure been there long enough for the checkpoints to get them. Is their a security permission or anything that would of keep the Checkpoint from taking a snpashot of these files?

As a side note if it matters we run Deduplication on this volume if that would casue any issue with it.

Thanks for any help.

  • Rainer_EMC

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    Posted May 24th, 2010 06:00

    Just use the hidden .ckpt folder instead of the Previous Versions tab

  • dynamox

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    Posted May 21st, 2010 12:00

    Go one level up in the directory tree ..look at checkpoints from that perspective.

  • 1597

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    Posted May 21st, 2010 13:00

    All the the Checkpoints say they are active.

  • 1597

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    Posted May 21st, 2010 13:00

    I have tried this and still nothing...the folder that i need to restore the files from is empty at all levels. So far it only seems to be this person's folder that is having the problem and noone else (at least that we can tell at the moment). I know there were files in it cause i can look at the folder in the tape backups and all the files are present...so its just like they are missing from the snapshots.

  • dynamox

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    Posted May 21st, 2010 13:00

    Strange …if you run “fs_ckpt  fsname -l”  ..all snapshot are active ? (none say “INACTIVE”)

  • 1597

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    Posted May 21st, 2010 15:00

    Are you sure the SnapSureVSS setting is enabled?

    [nasadmin@NS80-CS0 ~]$ server_param server_2 -facility cifs -info allowSnapSureVss
    server_2 :
    name                    = allowSnapSureVss
    facility_name           = cifs
    default_value           = 1
    current_value           = 1
    configured_value        =
    user_action             = none
    change_effective        = immediate
    range                   = (0,1)
    description             = Enables SCSF checkpoint access for CIFS

    It's on by default, but something could have turned it off, by some chance.  However, if it's turned off, that might explain why you can't see anything from Previous Versions.  Still, it sounds odd that no files are there.

    Thanks!

    Karl

  • Rainer_EMC

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    Posted May 21st, 2010 16:00

    due to the way checkpoints work (block-level) its simply not possible for some deleted/changed files to be missing while others are there (for the same fs and ckpt)

    if the checkpoint is active then the data is there

    whats possible:

    - the deletion was done before the last remaining active checkpoint

    - some Microsoft SCSF client problem to not display them

    - a corrupt checkpoint (but then you would have seen other problems)

    - the whole directory was deleted and recreated with the same name - then you simply need to look one layer up from the deleted directory

    I would suggest you search for these file using the hidden .ckpt directory or export it via an extra temp share

    to rule out an access view problem (ABE) you could also look at them using NFS or ftp

    deduplication is transparent and wouldnt cause this

    Rainer

  • dynamox

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    Posted May 21st, 2010 19:00

    got to love somebody's out of office spamming the forum

  • gbarretoxx1

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    Posted May 21st, 2010 19:00

    Hi,

    What's your NAS code version ?

    Primus emc234407 "Previous Versions tab on Windows client does not display files to restore when parent folder has been deleted." might apply to this case.

    There is already a fix for that.

    Gustavo Barreto.

  • 1597

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    Posted May 22nd, 2010 07:00

    Ha!  That's almost as good as the time I set an out-of-office on a postmaster account!