<nerd> (@gospel)
That KVM is directly wired to the servers (PS/2 or USB ports according to age). There are now a couple more servers in the rack, for a total of 14 ports of the 16-port KVM in use, but several will be retired shortly. They are mostly Windows, so for remote access I use RDP. The Open BSD firewall has no GUI, so is contacted using PuTTY; and the VMware server and its guest machines through the VMware client. The new machines are running Hyper-V, so when that is operational, machines will be contacted through the Hyper-V manager. There is one Xen-plus-Linux-guests machine in there, but it's not mine, so if I have to do anything with it, I just go to the console (eventually, when I get around to it).
Old machines (being retired shortly) have a small RAID-1 system disk and a larger RAID-5 data area. The VMware machine has 2TB of RAID-5, with no hot spare; when Hyper-V takes over, it will be reconfigured as a slightly smaller RAID-5 with hot spare - as near to RAID-6 as the controller will go. The new separate RAID array has 1TB of fast disks in RAID-6 and 8TB of slower disks in RAID-6 (2TB disks - well, if they're unreliable, that's what a service contract is for, right?); the array has two four-iSCSI-port controllers, and each server has four iSCSI ports, and it's all connected as a SAN split over two switches, so although it's only 1Gbps iSCSI, there's decent parallelism and redundancy - speed is not a big issue for us, but data security is.
Everything has two power supplies connected to different supplies (there are three UPSs and a mains strip to choose from).
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