Very poor performance from Dell/LSI Logic SAS 3000 series SATA/SAS RAID controller FreeBSD 6.3

[Xin LI]

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Andrew Snow wrote:
| Xin LI wrote:
|> I believe that data corruption can happen on every place if writing
|> cache is lost, it's not an UFS-specific feature :)
|
| ZFS has the promise of not requirring safe hardware write-caches due to
| its parity data and intent log.
|
|  From my understanding, it can promise that a data block has been
| written completely and safely, and that filesystem metadata is not
| corrupted, but out-of-order writes could still happen.

ZFS's promise is based on the fact that it does not overwrite data.
Oops, I think I should not use the term 'corruption', I meant 'loss'.

Cheers,
- --
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|>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Xin LI <delphij at delphij.net>	http://www.delphij.net/
FreeBSD - The Power to Serve!
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