Not quite true, hardware controller based RAID has been in use under Linux
for over 3 years now. Since then, the driver for the DPTs (EATA-DMA) has
been available.
> For the cuurent state of play, look into md.
>
> As I understand it, this is never as good as a special RAID controller.
> <simplifcation>
> This is a very clever box, which pretends to be a SCSI (or whatever) HDD
> while actually containing 9 (or whatever) real SCSI HDD's. As far as Linux
> is concerned, it's just got a SCSI HDD, and doesn't care any more.
> </simplifcation>
Yes, it is a little too much simplified (you're mixing external
SCSI--SCSI RAID subsystems with internal SCSI RAID controllers here) but
otherwise the idea is correct.
> These are normally better than a software solution, because you can do
> things like take out a broken HDD, and replace it, while the system
> is online.
True.
> They are, howvere, expensive....
But those who really need the IO performance and/or security are
willing to pay for it, since they know it is worth it.
Mike
Michael Neuffer i-Connect.Net, a Division of iConnect Corp.
mike@i-Connect.Net 14355 SW Allen Blvd., Suite 140
503.677.2900 Beaverton, OR 97008
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(Reply from an AOL tech-support rep speaking to a customer complaining
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