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Re: fsync error reporting

Greg Troxel <> writes:

>   1) operating system has a succcessful return from a write transaction to
>   a disk controller (perhaps via a controller that has a write-back
>   cache)
>   2) operating system has been told by the controller that the write has
>   actually completed to stable storage (guaranteed even if OS crashes or
>   power fails, so actually written or perhaps in battery-backed cache)

I see our man page addresses this with FDISKSYNC.   It sounds like you
aren't proposing to change this (makes sense), but there's the pesky
issue of errors within the disk when writing from cache to media.
Perhaps those are unreportable.

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