Date: Mon, 3 Jan 2005 14:32:46 -0500 From: Michael E.Conlen <meconlen@obfuscated.net> To: freebsd-performance@freebsd.org Subject: FC Disk array Message-ID: <3F362419-5DBE-11D9-B88F-00039367611E@obfuscated.net>
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I have a system connected to a IBM Fast-t 100 fiber channel disk array that I'm using as an NFS server. It's handling a moderate load of write operations, normally in the range of 4 to 8 MB/sec with an average write size of 16k constantly. The odd thing I've noticed in gstat and systat is that the system reports the disk as over 100% busy at times. I once saw it as high as 150%. I don't care that it does this, but it makes me wonder what the ceiling is. The system is a dual Xeon HT with hlt_logical_cpu set to 0 so I'm used to getting 400% worth of CPU in some of my metrics. -- Michael Conlen meconlen@obfuscated.net
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