Re: [MLUG - DISCUSSION] "missing" files after hard crash or power failure

["Mark Rages" <EMAIL:PROTECTED>]

On 4/2/07, George Robb <EMAIL:PROTECTED> wrote:
> There is a package for playing with the cache / drive parameters in
> general...  hdparm
>
> http://freshmeat.net/projects/hdparm/
>
> http://www.linuxdevcenter.com/pub/a/linux/2000/06/29/hdparm.html
>
> A simple hdparm /dev/<your drive here (not partition)>  will tell the
> current parameters.
>
> Good point that if there is a large cache on the drives or if they
> are on a RAID controller there could be some serious data floating in
> cache.
>
> ;)

Does sync() cause the data to be written?  I'm guessing no, since the
man page says:

    According  to the standard specification (e.g., SVID), sync() schedules
    the writes, but may return before the actual writing is done.  However,
    since  version  1.3.20  Linux does actually wait.  (This still does not
    guarantee data integrity: modern disks have large caches.)

Regards,
Mark
EMAIL:PROTECTED
--
Most of the time,
for most of the world,
no matter how hard people work at it,
nothing of any significance happens.
    -- Weinberg's Law

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