raid questions

[David Koski]

On Saturday 12 January 2008 14:46:17 Chris Lemire wrote:
> I'm being told that my raid setup is a bad idea. Is this true?
>
> http://forums.fedoraforum.org/showthread.php?p=941593#post941592

I think your are asking if mixing raid0 and raid1 on the same drives is a good 
idea, no?  Please be more specific.

Anyway, the cool thing about Linux software raid is it is so flexible.  If you 
need speed, you can use raid0 with two or more drives while using other raid 
levels on the same drives in different partitions.  To absolutely say that 
mixing raid0 and raid1 on the same drives is a bad idea makes no sense.  Just 
remember that your speed gain will diminish somewhat when the heads have to 
seek to your raid1 partitions.  How much depends on what you are doing.  But 
if for example your boot partition was raid1 (it cannot be raid0 or raid5) 
and the "/" partition was raid0, you would not expect any performance loss 
because the boot partition is only accessed on boot.  This is precisely the 
configuration I have used but abandoned due to the greater possability of 
data loss.

Regards,
David Koski
david at kosmosisland.com