Re: Block-level CRC checks

A curiosity question regarding torn pages:  How does this work on file systems that don't write in-place, but instead
alwaysdo copy-on-write? 

My example would be Sun's ZFS file system (In Solaris & BSD).  Because of its "snapshot & rollback" functionality, it
neverwrites a page in-place, but instead always copies it to another place on disk.  How does this affect the
corruptioncaused by a torn write? 

Can we end up with horrible corruption on this type of filesystem where we wouldn't on normal file systems, where we
arewriting to a previously zeroed area on disk? 

Sorry if this is a stupid question... Hopefully somebody can reassure me that this isn't an issue.