Re: increasing dd disk to disk transfer rate
- From: Ivan Voras <ivoras@xxxxxx>
- Date: Thu, 12 Jan 2006 18:48:20 +0100
Bakul Shah wrote:
In the last episode (Jan 12), Christoph Kukulies said:
dd if=/dev/ad2 conv=noerror,sync bs=64k | dd of=/dev/ad3 bs=64k
So now on the new disk he has files with random blocks of zeroes and *no* error indication of which files are so trashed. This is asking for trouble. Silent erros are worse.
He ought to do a file level copy, not disk level copy on unix. That way he knows *which* files are trashed and can do
The problem is, FreeBSD panics when it encounters bad sectors in filesystem metadata. I had the same situation ~a month ago and gave up, restoring from old backups. It will also probably panic on corrupted or zeroed metadata, but at least it's on a readable disk...
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