file system sizing with 5.x

Bruce M Simpson bms at
Fri Dec 5 12:14:32 GMT 2003

On Fri, Dec 05, 2003 at 11:05:51AM +0000, Martin Hepworth wrote:
> Now I'd like to put a 4TB RAID set (split into 3 1.xTB filesystems), 
> will appear to the Dell Perc 3 controller (actually badged LSILogic 
> megaraid chip set) as 3 single large disks...
> Has anyone had any experience of this sort of thing, will attaching the 
> 4TB box give me problems???

We run UFS1 on PERC2/Si at I don't imagine that splitting the
space you have across volume sets (I assume you're going to do RAID-5
with parity on one platter and data across the other three) should cause
you any problems in this case as you're letting the AAC device do
the thinking on this area.

The space would appear in this instance as three separate AAC disk devices.
You may find the sysutils/aaccli port I committed 2 months ago useful
for managing the array.

I haven't followed UFS2 discussions closely, most of the chattering on lists
seems to have concerned GEOM.


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