Subject: Re: comparing raid-like filesystems
To: Jason R Thorpe <>
From: Thor Lancelot Simon <>
List: current-users
Date: 02/01/2003 00:24:12
On Fri, Jan 31, 2003 at 06:17:30PM -0800, Jason R Thorpe wrote:
> Let's face it, we can do better.  RAID card vendors put RAID 0,1,5
> implementations into reasonably small amounts of flash every day ..
> I mean, the firmware updates fit easily onto a floppy with lots of
> room to spare.  And then they proceed to run that firmware on i960s,
> which aren't the fastest CPUs around.

It's noteworthy that:

1) Last time I picked one of those update floppies apart, the i960
   code on it turned out to be LZW-compressed.  Is RAIDframe really
   more than 2MB of object code?

2) It's just plain *astounding* how inefficient some of those
   implementations are.  On hardware with comparable memory bandwidth
   and CPU cycles available, *and lacking hardware XOR support*, with
   the same disks, RAIDframe is often considerably faster.  I have
   never understood how some RAID vendors' firmware can consistently
   perform so poorly.

 Thor Lancelot Simon	                            
   But as he knew no bad language, he had called him all the names of common
 objects that he could think of, and had screamed: "You lamp!  You towel!  You
 plate!" and so on.              --Sigmund Freud