classiccmp server hardware

From: Jochen Kunz <>
Date: Mon Oct 11 03:38:40 2004

On Sun, 10 Oct 2004 13:29:49 -0500
"Jay West" <> wrote:

> Interesting. I haven't used a promise card in a long time... but I
> thought I recalled the OS (FreeBSD) only seeing the logical drives,
> not the physical ones.
Maybe FreeBSD has a special driver that can detect the Promise RAID
setup and do the software RAID just like the Promise BIOS?

> I could well be wrong. Looks like 3ware two drive raid 0,1 controllers
> can be had for $115. Add to that a $60 some odd cost for another 160gb
> drive, and we should be cool.
You have to by two RAID controllers if you wane be real save. You need a
spare in case the RAID controler fails. The RAID controler is a single
point of failure!

> Just because you CAN do a thing, doesn't mean you should. I view cpu
> cycles as precious and not to be used frivolously even when available
> in good supply. Perhaps it dates back to my mentality of pouring over
> machine code to save a cycle here and there :)
It depends on the load that the server already has and how much overhead
software RAID1 causes. Typically RAID1 doesn't cost that much CPU. To
the past - present comparision: CPUs got a _lot_ more faster then disk
dirves in the past 20 years. See the thoughts behind the BSD LFS.
Received on Mon Oct 11 2004 - 03:38:40 BST

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