wellnevermind - 9 minutes ago »
https://www.computerhope.com/unix/urm.htm
The removal process unlinks a file name in a filesystem from its associated data, and marks that space on the storage device as usable by future writes. In other words, when you remove a file, the data in the file isn't changed, but it's no longer associated with a filename.
The data itself is not destroyed, but after being unlinked with rm, it becomes inaccessible.
Note: If you want is to completely wipe the data on the disk, use the shred command instead. shred will overwrite the file's contents so that they cannot be reconstructed later.
If it's merely unlinking the data, why does it take a very long time to process a set of recording deletions set up from the Foxsat-HDR File manager option ?
When you press the power button you get a message saying the box will go to sby when the deletions are processed.
With a lot of recordings I have seen it take up to an hour when cleaning out a 1TB drive.
This link says the data is unrecoverable even when using RM
https://unix.stackexchange.com/questions/10883/where-do-files-go-when-the-rm-command-is-issued
Nowhere, gone, vanished. Well, more specifically, the file gets unlinked. The data is still sitting there on disk, but the link to it is removed. It used to be possible to retrieve the data, but nowadays the metadata is cleared and nothing's recoverable.
So there is no file recovery at all.
So is post 23 accurate or just plain wrong ?
The custom firmware for the HDR-FOX-T2 does give a undelete option, but it presumably merely moves the files to a seperate area of the hard drive and presumably the undelete moves them back again.
| Thu 25 Apr 2019 15:21:18
#27 |