Network and Storage Protocols

Does a file "undelete" utility exist for the NetApp WAFL filesystem?

bepresseditor
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As I understand it, where possible Data ONTap and WAFL do not reuse disk sectors when writing or rewritnig a file.

How about when deleting a file?  Are the data blocks used for the file immedialy returned to the free pool, or kept for a while?  I'm intresetd in an "undelete" or "unerase" uitility for WAFL.  We recently had some log files that were supposed to be compressed, but were instead truncated, over nfs.  Were WAFL a FAT or EXT3 or Hammer based filesystem, I'd know right where to go to recover at least most of the data.

On FC disks with BCS I understand there might not be extra space to link the blocks into a logical order.  On SATA disks with ZCS is the "extra" space used to store any redundant metadata that might be useful in chaining blocks together for undelete?  What are the undelete options with WAFL?

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