43 lines
1.9 KiB
HTML
43 lines
1.9 KiB
HTML
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<TITLE>Linux Ext2fs Undeletion mini-HOWTO: What recovery rate can I expect?</TITLE>
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<H2><A NAME="s3">3. What recovery rate can I expect?</A></H2>
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<P>That depends. Among the problems with recovering files on a
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high-quality, multi-tasking, multi-user operating system like Linux is that
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you never know when someone wants to write to the disk. So when the
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operating system is told to delete a file, it assumes that the blocks used
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by that file are fair game when it wants to allocate space for a new file.
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(This is a specific example of a general principle for Unix-like systems:
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the kernel and the associated tools assume that the users aren't idiots.)
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In general, the more usage your machine gets, the less likely you are to be
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able to recover files successfully.
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<P>Also, disk fragmentation can affect the ease of recovering files. If the
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partition containing the deleted files is very fragmented, you are unlikely to
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be able to read a whole file.
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<P>If your machine, like mine, is effectively a single-user workstation, and
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you weren't doing anything disk-intensive at the fatal moment of deleting
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those files, I would expect a recovery rate in the same ball-park as
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detailed above. I retrieved nearly 94% of the files (and these were
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binary files, please note) undamaged. If you get 80% or better, you
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can feel pretty pleased with yourself, I should think.
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