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Data Storage

+ - SAN's and disk utilization

Submitted by
pnutjam
pnutjam writes "I work for a small to medium mental health company as the Network Administrator. While I think a SAN is a bit of overkill for our dozen servers it was here when I got here. We currently boot 7 servers from our SAN and all their disks are also on the SAN. Several of them have started to show excessive disk load, notably our SQL server and our old file, print, & domain controller server. I am in the process of seperating our file/print server from our domain controller, but right now I get excessive disk load during the morning when people log on (we use roaming profiles). I think part of this is because the disks need to be defragged. I get different answers from everybody when I ask if I should defrag on the servers (windows 2003), or the SAN (xiotech), or both. I also get conflicting answers when I inquire whether I would get better throughput from newer fibre-channel cards (ours are PCI-x, PCI-e is significantly faster), or mixing in some local disks, or using multiple fibre channel cards.

I would like to know if anybody else has dealt with a similar situation or has some expertise in this area."

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