Hi,

When I used to use NDMP I had one media server (i did not setup the 
initial environment) but the way it was setup is there was one media 
server with LTO-2 drives that were attached to the netapp/toaster), SSO 
was not used in the environment, nor were any fiber switches, this is a 
waste of two drives in the big picture, but this environment was 
specifically setup to backup this netapp/toaster unit.

Do you have a lot of netapp filers? Do you use SSO?

Justin.

On Mon, 20 Jul 2009, Clooney, David wrote:

> Thanks Justin
>
> Very useful info, however I was thinking more along the lines of a NBU
> limitation as a lot of the drives we are configuring are in fact
> filer/NDMP based drives and the overheads will be on the filer.
>
> Regards
>
> David Clooney
>
> -----Original Message-----
> From: Justin Piszcz [mailto:jpiszcz AT lucidpixels DOT com]
> Sent: 20 July 2009 12:42
> To: Clooney, David
> Cc: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] Remommended maximum # of drives per media
> server.
>
> Hi Dave,
>
> That depends on how much throughput you can drive through the
> motherboard/network/disk.
>
> LTO-3 = 90MiB/s for compressed data
> LTO-4 = 120MiB/s for compressed data
>
> (when rating, people usually rate for 180MiB/s and 240MiB/s to account
> for
> 2:1 compression)
>
> So if you have 10 gigabit ethernet (or) a fast disk array, you need to
> make sure there is enough bandwidth (today, PCI-e lanes) on the
> motherboard to handle how many drives you plan on putting in a server.
>
> This is just my opinion:
>
> Minimum drives per media server: 2 (to faciliate a restore incase one
> drive goes down and you are not using the FORCE_RESTORE media server
> directive).
>
> LTO-2 = 2 drives per server (hp dl38[0-5]* class + 1gbps)
> LTO-3 = 4 drives per server (same class + 10gbps)
> LTO-4 = 3-4 drives per server (if same class of hw + 10gbps)
>
> What kind of configuration(s) does everyone here use? How many drives
> per
> media server?
>
> Justin.
>
> On Mon, 20 Jul 2009, Clooney, David wrote:
>
>> Hi All
>>
>>
>>
>> Does anyone know the symantec maximum number of recommended drives per
>> media server?
>>
>>
>>
>> Regards
>>
>>
>>
>> Dave
>>
>>
>>
>>
>> Notice to recipient:
>> The information in this internet e-mail and any attachments is
> confidential and may be privileged. It is intended solely for the
> addressee. If you are not the intended addressee please notify the
> sender immediately by telephone. If you are not the intended recipient,
> any disclosure, copying, distribution or any action taken or omitted to
> be taken in reliance on it, is prohibited and may be unlawful.
>>
>> When addressed to external clients any opinions or advice contained in
> this internet e-mail are subject to the terms and conditions expressed
> in any applicable governing terms of business or client engagement
> letter issued by the pertinent Bank of America group entity.
>>
>> If this email originates from the U.K. please note that Bank of
> America, N.A., London Branch, Banc of America Securities Limited and
> MBNA Europe Bank Limited are authorised and regulated by the Financial
> Services Authority.  For all U.K. corporate disclosures, please refer to
> www.bankofamerica.com/ukcompanies
>>
>
>
>
> Notice to recipient:
> The information in this internet e-mail and any attachments is confidential 
> and may be privileged. It is intended solely for the addressee. If you are 
> not the intended addressee please notify the sender immediately by telephone. 
> If you are not the intended recipient, any disclosure, copying, distribution 
> or any action taken or omitted to be taken in reliance on it, is prohibited 
> and may be unlawful.
>
> When addressed to external clients any opinions or advice contained in this 
> internet e-mail are subject to the terms and conditions expressed in any 
> applicable governing terms of business or client engagement letter issued by 
> the pertinent Bank of America group entity.
>
> If this email originates from the U.K. please note that Bank of America, 
> N.A., London Branch, Banc of America Securities Limited and MBNA Europe Bank 
> Limited are authorised and regulated by the Financial Services Authority.  
> For all U.K. corporate disclosures, please refer to 
> www.bankofamerica.com/ukcompanies
>
_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu