brettw at cray.com.au
Wed Feb 20 09:35:18 EST 2002
On Tue, 19 Feb 2002, Antony Stace wrote:
> > And if you're looking for bad blocks and are not just wanting to check the
> > filesystem (?) integrity then use "dd". e.g.
> > dd if=/dev/hda2 of=/dev/null bs=256k conv=noerror
> This sounds like what I want. I want to see if the disk has physical errors. I
> do not want to destory the data on the partition at the moment. Will this command
> be ok to run once I have unmounted the partition? ie it will not delete any data?
Yes. You can just run this on an unmounted partition. It just reads
blocks directly from the device and writes to /dev/null.
if = input file
of = output file
bs = block size
conv=noerror means dont stop when you hit an error.
"man dd" is worth a look. It can even do EBCDIC <> ASCII conversion!
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