-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Ed Wilts
Sent: Friday, March 21, 2008 4:38 AM
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] lto4 fc bottleneck

You're mixing up bits and bytes.  Your fibre hba is 1 Gb (little b = bit).  Your drives are capable of 120MB (big B = byte).  So you're trying to put 120MB of data down a roughly 100MB pipe.

 

I'd say that for each LTO-4, you're going to need a dedicated 1Gb HBA or upgrade the HBAs switch to 4Gbps and then you can get away with only 2 of them.

On Thu, Mar 20, 2008 at 12:21 AM, gina_fle <netbackup-forum AT backupcentral DOT com> wrote:

If I was running only six LTO4 drives that is capable of 120MB on a 1GB fiber hba, would that be a bottleneck?  120 x 6 = 720MB even though the switch is 1GB?

--
Ed Wilts, Mounds View, MN, USA
mailto:ewilts AT ewilts DOT org

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