Joe is absolutely correct about LUN usage with EMC arrays. However, one
must keep in mind that EMC arrays were far more expensive than the
VA7xxx and DS2xxx and thus were not really as widespread in the HP3000
universe or "ecosystem," so as to cause LUNs to enter the lexicon of MPE
users.
Also, and correct me if I am wrong, but the EMC arrays were usually
installed by the vendor who would also provide training on these
devices. Radically different price ranges.
I will pass the comment to the SolSymp people.
Denys
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Tuesday, February 17, 2004 10:25 AM
To: [log in to unmask]
Cc: Denys Beauchemin; [log in to unmask]
Subject: Re: [HP3000-L] VA7110 LUN usage
I agree that the SolSym should do a topic on VA technology for the
HP3000. There are issues with using the VA technology on older systems
that cannot take advantage of direct fiber.
I disagree that LUN technology is new for the HP3000 though. EMC has had
a foothold with many HP3000 shops dating back to 1997. I have seen many
Amisys sites use them as part of an overall SAN technology as well as
other HP3000 sites.
If HP is listening they should post an e-mail on how to get to the white
papers that were to be completed on how the technology is set up for the
HP3000 systems using direct fiber.
> The VA7xxx series is a product of HP StorageWorks, a portion of Compaq
> that HP acquired during the merger. It has produced some very nice
> products for quite a while now. The mass storage stuff is really
> excellent. I am at a loss to say the same about their tape libraries.
>
> I am actually quite impressed that HP was able to provide MPE support
> for this mass storage equipment, even though it was done after the EOL
> announcement for the HP 3000. The biggest problem MPE users have with
> this equipment is a version problem. There has to be some patches
> installed on 6.0 or 6.5 to make this device work. Once you have that,
> it is pretty straightforward. But the other problem on MPE, is a lack
> of understanding what such an array can do. MPE people are more used
to
> a one-to-one relationship between device and Ldev or volume. With the
> virtual array, this relationship disappears, everything is, well,
> virtual. LUNs are also foreign to the MPE universe, but once these
> concepts are understood, everything falls into place.
>
> Perhaps this should be a thread on this list, or better yet, a session
> at the Symposium or HP World. After all, these storage devices are
> going to be critical for homesteaders.
>
> Denys
>
> -----Original Message-----
> From: HP-3000 Systems Discussion [mailto:[log in to unmask]]On
> Behalf Of Joseph Dolliver
> Sent: Monday, February 16, 2004 8:04 AM
> To: [log in to unmask]
> Subject: Re: [HP3000-L] VA7110 LUN usage
>
> Sounds like Neumann is an honest person from HP, but what does this
tell
> you
> from what he does say? << I will admit I have not much idea of
> CommandView,
> but I am
> speculating >>
>
> This is a product that HP created correct? Maybe I am wrong, I have
been
> wrong before but what I can tell you is HP strains to help it's
> customers
> understand what they do not understand themselves and we all pay
bigger
> buck
> than before since the gene pool at HP has depleted to the point that
HP
> cannot even spell HP3000.
>
> This is not intended to pick on you as an individual since I have seen
> many
> helpful postings from you and know you really care, IT's YOUR COMPANY
> that
> Stinks
>
> David is only one customer of a minimum of 5 that I have seen having
> problems from HP trying to understand/install/train on the VA7XXX
disks.
>
> So why don't we get HP to post documents on "how to install on an
HP3000
> /
> configure and maintain these VA7XXX units. They have them for HP-UX.
>
>
>
>
>
>
> -----Original Message-----
> From: HP-3000 Systems Discussion [mailto:[log in to unmask]]On
> Behalf Of Goetz Neumann
> Sent: Monday, February 16, 2004 6:49 AM
> To: [log in to unmask]
> Subject: Re: [HP3000-L] VA7110 LUN usage
>
>
> David N Lukenbill wrote:
>
> > I can't copy the information from CommandView. From Command View
SDM,
> "LUN
> > Management" tab, "Logical LUNs" button, the "Capacity" column shows
> usages
> > of 7%, 17%, 17%, 17% for LUNs 1, 2, 3, 4.
> [snip]
> > LDEV : 1 -- (MPEXL_SYSTEM_VOLUME_SET:MEMBER1)
> > Device | 16777200 | 1706688 ( 10%) | 15070512 (
90%)
> |
> >
> > LDEV : 2 -- (MPEXL_SYSTEM_VOLUME_SET:MEMBER2)
> > Device | 37748720 | 3251888 ( 9%) | 34496832 (
91%)
> |
> >
> > LDEV : 3 -- (MPEXL_SYSTEM_VOLUME_SET:MEMBER3)
> > Device | 37748720 | 3112400 ( 8%) | 34636320 (
92%)
> |
>
> > LDEV : 4 -- (MPEXL_SYSTEM_VOLUME_SET:MEMBER4)
> > Device | 37748720 | 3355168 ( 9%) | 34393552 (
91%)
> |
>
>
> I will admit I have not much idea of CommandView, but I am
> speculating that what it tells you about the LUNs are the
> percentages of the overall VA's capacity being used by
> these LUNs.
>
> I.e. 7% + 3*17% = 58% of the VA's capacity is used by these
> 4 LUNs.
> Sort of fits, since your LDEV 1 LUN is apparently 4GB and the
> other 3 are 9GB.
>
> Goetz.
>
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