As with most 1U servers, there's not a whole lot of space available in the 325 for extras--loads of drive bays and redundant power supplies--but IBM makes good use of the limited real estate. The front panel has two removable drive bays in hot-swappable Ultra320 SCSI or nonswappable IDE, a 48x CD-ROM drive, two USB 1.1 ports, and recessed power and reset buttons. In the back of the 26-inch chassis, there are two more USB ports, dual 10/100/1000 Broadcom Ethernet, serial and video ports, and room for one half-length and one full-length PCI-X 64-bit/100-MHz expansion cards.
Surprisingly absent are the traditional PS/2 ports for mouse and keyboard. This means you'll have to upgrade to newer, USB-compatible KVM switches or adopt one of IBM's sophisticated cluster-management solutions. Storage options for the 325 range from a single 7,200-RPM, 80-GB EIDE hard drive to dual hot-swappable 10,000-RPM, 148.6-GB Ultra320 SCSI drives--sufficient when you consider that this system is geared to providing high-processor density in a clustered environment.
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