Re: [Veritas-bu] lto4 fc bottleneck

Yes, because your HBA is 1 giga-BIT per second, not 1 giga-byte. A 1 Gbps connection will clear at best 100-110 MBps. If you want to spin LTO4 drives at close to full speed put at most 2 LTO4 drives per modern 4 Gbps FC ports. If you are getting good hardware compression at the drive even that could be a bottleneck. And you have to have a server capable of driving that kind of data rate too.

Jim VandeVegt
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----- Original Message ----
From: gina_fle <netbackup-forum AT backupcentral DOT com>
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Sent: Thursday, March 20, 2008 12:21:23 AM
Subject: [Veritas-bu] lto4 fc bottleneck

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?

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