Without changing the requirement of 40 devices you definitely have a
problem.  Can we have more details about why the 40 devices are
necessary?  How much bandwidth do you have at a SAN layer?

Let's say theoretical max speed you'll get on your VTL is a very
generous 120MB/s...  You'd need 10 4gb HBA ports (with all paths
having discreet bandwidth) to drive that.

Using a more typical 50MB/s average you'd need 4 4gb HBA ports worth
of discreet traffic to drive that bandwidth.

In a virtual environment is there much difference between 4 drives
with 1 stream or 1 drive with 4 streams?  And remember in NW adding
and removing drives for standard maintenance from media pools is a
chore with just 20 drives at our site.

Alec

On 3/12/10, Coty, Edward <Edward.Coty AT aig DOT com> wrote:
> Thanks for the quality feedback.
>
> EDWARD COTY
> LEAD STORAGE ENGINEER, LCNA, NACP
> WORK - 973-533-2098
> CELL - 973-296-0918
> EDWARD.COTY AT AIG DOT COM
>
> -----Original Message-----
> From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] 
> On
> Behalf Of Stefan Nobbe
> Sent: Thursday, March 11, 2010 10:47 PM
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: Re: [Networker] Networker 7.4.4 Power Edition
>
> Think this will be a problem?
>
> Sent from my iPhone
>
> On Mar 11, 2010, at 9:08 PM, "Coty, Edward" <Edward.Coty AT AIG DOT COM> 
> wrote:
>
>> All,
>>
>> Using IBM Protectier VTL. Creating 2 virtual libraries per networker
>> servers. 40 drives apiece. So two virtual libraries totaling 80
>> drives. Plan was to single stream 64 sessions, one per drive.
>>
>> Being told by EMC that power edition can only handle 32 devices.
>> Telling me I have to throw more hardware at the problem.
>>
>> Is this a driver issue? I have added S/N licenses with no luck.
>>
>> Currently inquire shows two scsi LCP with 16 drives apiece(32)
>> although OS sees 80 devices in /dev/rmt.
>>
>> Any thoughts? Anyone using IBM PT VTL with Networker?
>>
>> Thanks
>>
>> EDWARD COTY
>> LEAD STORAGE ENGINEER, LCNA, NACP
>> WORK - 973-533-2098
>> CELL - 973-296-0918
>> EDWARD.COTY AT AIG DOT COM
>>
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