[rescue] Filesystem choice for fileserver?

Lionel Peterson lionel4287 at verizon.net
Sat Apr 19 23:42:03 CDT 2008

>From: Shannon Hendrix <shannon at widomaker.com>
>Date: 2008/04/19 Sat PM 04:11:08 CDT
>To: The Rescue List <rescue at sunhelp.org>
>Subject: Re: [rescue] Filesystem choice for fileserver?

>On Apr 18, 2008, at 10:10 , der Mouse wrote:
>>>> A lot of hardware RAID cards have horribly slow processors on them.
>>> [..."hardware RAID"...]
>> Does anyone actually do hardware RAID?  I've never seen any.  All the
>> supposedly-hardware RAID I've seen is actually software RAID running  
>> on
>> a dedicated processor (what would more honestly be called firmware
>> RAID).  Usually it doesn't even try to hide that - for example, I've
>> seen POST-time messages like "booting controller kernel".
>> Have I missed something?  Is there anyone who actually does RAID in
>> hardware?
>Well, thinking that way:
>I've never seen a hardware CPU.  They all are programmed in microcode  
>or "fixed logic instructions".
>Has anyone actually done a CPU in hardware?

Following your logic, in order to sell a controller as "hardware RAID" you'd have to fully implement RAID functionality in hard-wired gates, with no "soft logic" inside? That threshold is a bit high - I think it would be fair to set the bar at "RAID implemented to not rely on host RAM and/or CPU"...


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