On Fri, Dec 9, 2011 at 11:27 AM, Alan McKay <alan.mckay at gmail.com> wrote > > So 2 questions : > - how important is it to have it on its own network? > I would say very important, but probably not required. A separate network segregates the traffic, and you can secure it better. You can also have failover, etc, and potentially use cheaper switches. > - is it OK to use an unmanaged switch (as long as it is Gigabit), or are > there some features of a managed switch that are desirable/required with > iSCSI? > I've setup two iSCSI storage networks. The first was with unmanaged Dell switches... each was only about $200 I think, and it worked great. For the second, I'm not using switches at all and connecting directly from the NIC on the server to the NIC on the disk array. Fortunately, we only have a couple of servers and the IBM disk array comes with an additional card that has 4 NICs on it. You can use managed switches, even ones that are currently supporting your LAN, but I would create some VLANs to separate the traffic. You should also make sure jumbo frames are enabled as well. If you're concerned about maximizing throughput, then a managed switch will have more options to fine-tune this such as link aggregation, but in my cases, I wasn't worried about this because the "default" setup was fast enough for our needs. In the current direct connect setup, the iSCSI network is supporting virtual machines. So even without much tinkering, the speed is good enough. However, everyone's requirements are different. ...adam ____________________________________________ Adam Wead Systems and Digital Collections Librarian Rock and Roll Hall of Fame and Museum