rsync seems to overwhelm a failing hard disk
cgdennis at btinternet.com
Mon Nov 25 14:41:26 MST 2013
Hello rsync people
Today I was recovering data from a beginning-to-fail external USB hard disk.
I started with my usual 'rsync -av --ignore-errors <source> <dest>', and
that was fine until it got to the first I/O errors. It paused but
continued after the first couple of errors, but then the disk started
buzzing and rsync gave error messages for every file (I'm afraid I
didn't note the exact text of the messages). After that, every run of
rsync (trying to --exclude the faulty files and folders) started the
disk buzzing again, and rsync couldn't copy anything.
The curious thing was that after replugging the disk, I was able to
manually drag-and-drop a lot more files from the disk via the Debian
desktop. Trying rsync again quickly caused the buzzing problem again.
In other words, a simple file copy was able to read the disk when rsync
gave errors. Is that to be expected? Is there a way to make rsync more
gentle on a fragile disk?
Chris Dennis cgdennis at btinternet.com
Fordingbridge, Hampshire, UK
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