On Tue, Sep 30, 2008 at 1:41 PM, Bruce Momjian <bruce@momjian.us> wrote:
Alvaro Herrera wrote: > A customer of ours has been having trouble with corrupted data for some > time. Of course, we've almost always blamed hardware (and we've seen > RAID controllers have their firmware upgraded, among other actions), but > the useful thing to know is when corruption has happened, and where. > > So we've been tasked with adding CRCs to data files.
Maybe a stupid question, but what I/O subsystems corrupt data and fail to report it?
Practically all of them. Here is a good paper on various checksums, their failure rates, and practical applications.
