Raid 5

[eniac]

I belive raid 5 is not yet in OS X server.  I've been running raid 1 at 
work with OS X for about 3 months, and to be perfectly honest, I don't 
feel in control of the arrays.  I have an xserve with 4 120GB drives in 
her.  I've had 2 arrays of 2 disks apiece, with 1 volume holding the OS, 
and the other volume acting as the active service storage (http, ftp, 
file sharing...).  Right now I'v got currently running a RAID 0 of 3 
disks giving me a ton of usable space and the OS installed on a 
partition of the other 120.

I'm not impressed.  I've had several incedents where the application of 
a software update causes one of the disks to fall off the array.  I've 
never had data loss, but one of the two drive decieded to not come up on 
boot.  A resyncing of the array was nessesary.  This has happened twice 
with the RAID 1 configuration.   The current RAID 0 seems much more 
robust and capable, but its just big, not safe.  Software RAID under 
linux (I've had experience with RAID 1 and RAID 5 under 2.4.x) is very 
nice.  Featurefull to say the least.  Its reliable, I've done flat out 
stupid things to test it like 'cat /dev/urandom > /dev/hdg' randome data 
to one disk of the raid set while writing data to the filesystem that is 
provided by that set.  

Patrick Dorn wrote:

> I believe in the server edition of OS X you can do RAID 5 and you are 
> probably right about the other OS versions not supporting it. However 
> in YDL you should be covered when you load the OS with the proper 
> hardware installed ..i.e. RAID controller. Were you thinking about 
> software RAID or Hardware?
>
>
> /Patrick M. Dorn/
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