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I’ve investigated the source as to how cron handles mailing the output from its jobs: cron(8) sets up stdout and stderr of the running job and pipes it directly into mail(1), not leaving any temporary files. Look in do_command.c around line 411 (1). mail(1) needs to fully ready its stdin, since it needs the headers. It opens a temporary file (usually ...


Yes, if you run into problems like this a good way how to resolve it is cat /dev/zero >/dev/disk(whole one) so that it zeroes it all out and then start over with properly aligned disk. It throws sometimes errors when it finds parts of the bootcode that was in there before.

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