Just a quick note on those HP microservers - I have one, and I'm fond of it, but the e-SATA port doesn't support hotplug and the inbuilt ethernet doesn't support jumbo frames (at least, under versions of Linux that I've tried).
The e-SATA thing probably doesn't matter too much, but for anyone looking to run iSCSI or even higher-throughput NFS, the absence of jumbo frames may be a more important consideration.
The e-SATA thing probably doesn't matter too much, but for anyone looking to run iSCSI or even higher-throughput NFS, the absence of jumbo frames may be a more important consideration.