I have an IBM RS/6000 Powerserver 930 running AIX 3.2.5. That's a nice big rack-mount 240 volt beast from around 1990. Perfect for home use. I had to rip it apart and put it in a smaller rack in order to get it through my front door. I believe it was the top-of-the-line RS/6000 server at the time it was introduced.

Photo of the CPU unit.
Photo of the weight warning on the CPU box.
Photo of the drive bay.
Photo of the Exabyte 8mm tape drives.
Photo of the cables in back.

Is has a decent (by today's standards) front panel, with a keylock that is actually usefull, and a three digit LED display which is under user control. I use mine to display system load, number of logins, and a heartbeat indicator. I also wrote a program to display morse on these lights.

Photo of the front panel.
Photo of the front panel.

Once I had a brown-out that took down all of my computers except the RS/6000. I found this in the logs:

ERROR_ID TIMESTAMP  T CL RESOURCE_NAME  ERROR_DESCRIPTION
74533D1A 0611152500 U H  SYSIOS         LOSS OF ELECTRICAL POWER
0EC7E7E5 0611152500 U H  SYSIOS         Electrical power resumed
C14C511C 0611152500 T H  scsi0          ADAPTER ERROR

Apparently the caps in the power supply were big enough to ride it out, and it was intelligent enough to inform the system & log it. I assume the scsi0 adapter error was one of my hard drives power cycling.

The modem has a nice LCD display, on-screen menus, and can actually run diagnostics on your phone line!

Photo of the modem.
Photo of the modem.