[kwlug-disc] Hardware raid vs linux

Khalid Baheyeldin kb at 2bits.com
Thu Aug 20 20:35:36 EDT 2009

Performance is not the main reason. Hardware RAID may be better than
software in most cases, at least with high end cards.

Low end cards are not true RAID, and performance is not very good, compared
to software (Linux based) RAID.

The one big advantage of md (multiple disks) vs. RAID, is that you are not
on a specific hardware for what goes on the disk. The disks are still
accessible if your
controller fails

If you have the disks, then do full mirroring with MD, and that is it.

On Thu, Aug 20, 2009 at 7:47 PM, Insurance Squared Inc. <
gcooke at insurancesquared.com> wrote:

> I'm looking at rebuilding raid on my webserver which provides for hardware
> raid.  Reading online seems to indicate that I'd be better off using
> software raid under linux (linux, is there anything you can't do?).  Seems a
> bit suspicious to me that software outperforms hardware.  Any comments on
> the reality of the situation?

Khalid M. Baheyeldin
2bits.com, Inc.
Drupal optimization, development, customization and consulting.
Simplicity is prerequisite for reliability. --  Edsger W.Dijkstra
Simplicity is the ultimate sophistication. --   Leonardo da Vinci
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