Re: XFS and DPX files

Martin Spott
2009-12-14T16:17:55Z

Michael Monnerie wrote:

> Don't mix up the controller write cache vs. disk write cache. The
> controller write cache should be on whenever you have a BBM installed,
> because this brings real performance, while the disk write cache should
> always be off in a production environment, because you will loose data
> on power fail, which nobody can recognize (the controller believes the
> sectors to be written already...)

I've been under the impression that "modern disks" (TM), at minimum the
server-type products, are supposed to re-use the remaining spin-energy
for generating the required power and thus writing the content of their
on-disk write cache to the disks.

Cheers,
Martin.
--
Unix _IS_ user friendly - it's just selective about who its friends are !
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