Re: NWSSTG size ?

[Jim Oberholtzer <midrangel@xxxxxxxxxx>]

Jack,

In this case I would use 70GB drive sizes.  When the partition needs 
more storage make up as many 70GB storage areas as you need and add them 
to the system.  Since your not worried about RAID (handled by the host 
system) you just add them as needed.  So, if you only need 50GB more 
space, add one drive, if you need 150GB then add two or three.  In any 
case I would keep the sizes of the drives consistent, and only add 
what's needed for the partition.

What we are really after is a MINIMUM of six drives so IBM i can do it's 
thing with single level storage.  Once you have at least that many 
drives, then IBM i is happy.  Just add what you need.  It will allow 
work management and the task dispatcher to use the multiple threads 
available for I/O.

Sorry if we (I) have confused the issue.

Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


On 11/2/2011 1:59 PM, Jack Kingsley wrote:
> I really appreciate the feedback, but what happens when I add drives, I am
> hoping to conform to the 6 drive approach if it serves the best purpose
> which I am not doubting.  I am trying to understand the (what do I do) now
> that I have added drives.  Let me guess, I need to save the workload, break
> the storage spaces and recreate them to evenly match out to 6, then reload
> what I saved??
>
> On Wed, Nov 2, 2011 at 12:09 PM, Jim Oberholtzer<midrangel@xxxxxxxxxx>wrote:
>
> > >  Answer Yes you would.  Although I would modify the 6 drives to a
> > >  standard size that IBM i uses rather than 83GB.
> > >
> > >  We've had the discussion about why you use multiple drives ad nauseam
> > >  before.  And yes, I think Pete has set up more hosted environments than
> > >  anyone I know.
> > >
> > >  Jim Oberholtzer
> > >  Chief Technical Architect
> > >  Agile Technology Architects
> > >
> > >
> > >  On 11/2/2011 10:14 AM, Jack Kingsley wrote:
> > > >  >  Pete, so if I am going to have 500GB defined and I divide it by 6 so I
> > > >  >  would then have 6 (83GB) storage spaces, so what happens when I add disk
> > > >  >  drives and need more storage spaces at that point.  If I am going to
> > >  have a
> > > >  >  system with 14 LPAR(s) and each lpar is to have 500 GB of disk then I
> > >  will
> > > >  >  have 84 network storage spaces??
> > > >  >
> > > >  >  On Tue, Nov 1, 2011 at 5:17 PM, DrFranken<midrange@xxxxxxxxxxxx>   wrote:
> > > >  >
> > > > > >  >>  >    You guys better stop doubting Pete on this stuff - he's probably set
> > >  up
> > > > > >  >>  >    half of these hosted partitions and he doesn't do things without good
> > > > > >  >>  >    reason......
> > > > > >  >>  >
> > > > > >  >>  >      - DrF
> > > > > >  >>  >
> > > > > >  >>  >    On 11/1/2011 4:55 PM,rob@xxxxxxxxx   wrote:
> > > > > > >  >>>  >    >   That number of 6 seems to match one of the posts I found.
> > >    Thanks.
> > > > > > >  >>>  >    >
> > > > > > >  >>>  >    >
> > > > > > >  >>>  >    >   Rob Berendt
> > > > > >  >>  >    --
> > >  --