Paul,
I agree that the more you slice the better the performance. Makes
sense, more paths to the same disc. I have a limitation on FWSCSI cards ..
Only 1, but performance is not a factor for this particular situation.
Thanx for the link ! Donna, thank you to, for your input ...
Thanx
Dane
----- Original Message -----
From: "Paul, Guy (San/Storage Delivery)" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, January 09, 2004 6:31 PM
Subject: Re: [HP3000-L] Huge LUNs on a 997
> Jim Hawkins of vCSY gave a nice presentation on the I/O
> roadmap for MPE. You should be able to have up to a 146GB
> ldev.
>
> http://jazz.external.hp.com/mpeha/papers/HPWorld2003_hawkins_files/frame
> .htm
>
> donna makes a good point regarding performance the limiting factor
> here being FWSCSI running ~13mb/sec. Trial and error over the years
> has thought me to put no more than 70GB/FWSCSI on a busy system.
>
> If you have Hyper-Volume extension on your EMC I would suggest slicing
> the mechs up a little smaller.
>
> HTH,
>
> Guy Paul - HP
> SAN/Storage
>
> > -----Original Message-----
> > From: HP-3000 Systems Discussion
> > [mailto:[log in to unmask]] On Behalf Of donna garverick
> > Sent: Friday, January 09, 2004 2:58 PM
> > To: [log in to unmask]
> > Subject: Re: Huge LUNs on a 997
> >
> >
> > --- Dane Bodamer <[log in to unmask]> wrote:
> >
> > > Thanx !... I thought 73GB was the limit. I guess I'm just
> > > wondering if MPE will hang, halt or perform poorly, if I go
> > 144GB. I
> >
> > > suppose the only way I can find that out is if someone had tried it.
> >
> >
> > i believe if you were to attach a drive large than 73gb, mpe
> > would simply ignore the space beyond that limit. i'm
> > reasonably certain that's how mpe behaves if you're on an
> > older version of the os and you replace ldev 1 with something
> > larger than a 4gb disc drive -- the extra space is ignored.
> >
> > if it were me and this were a production box....i would try
> > for anything beyond 73gb. it might be considered a
> > 'career-threatening' move.
> >
> > you should also give some consideration to the performance
> > impact of trying to configure large luns in general. t-boxes
> > (99x) have a pretty
> > limited back plane. maybe chuck can address this issue
> > better.... - d
> >
> > =====
> > Donna Garverick Sr. System Programmer
> > dgarverick -at- longs -dot- com
> > 925-210-6631 Longs Drug Stores
> >
> > Come, my friends, 'Tis not too late to seek a newer world.
> > Tho' much is taken, much abides; and tho'
> > We are not now that strength which in old days
> > Moved earth and heaven, that which we are, we are.
> > "Ulysses", A. Tennyson
> >
> > >>>MY opinions, not Longs Drug Stores'<<<
> >
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