(from the AlphaServer DS20L Technical Summary)
The AlphaServer DS20L systems have two Alpha 21264B 833 MHz CPU chips. Up to
2 Gbytes of memory can be installed. Second-level cache is 4 Mbytes per processor.
The switchbased system interconnect exploits the full potential of the Alpha
chip.
 The
system measures 17.5 x 20.5 x 1.75 inches (1U) and can be
rackmounted in a 79- or 67-inch M-series cabinet. In the
79-inch cabinet up to 40 systems can be installed, or if
more storage is desired, there can be up to six StorageWorks
shelves per cabinet. A rackmount slide kit is mandatory with
each system in a cabinet.
Each system has two drive bays. One is for the system disk
drive, which can be either IDE (20 or 40 GB disk) or SCSI
(18.2, 36.4, or 72.8 GB disk). The other can hold an optional
CD-ROM.
Two 10/100 fast Ethernet controllers and an Ultra3 SCSI
controller are integrated into the system. For expansion
there are two 64-bit, 33 MHz PCI slots (2/3 length). Two
serial ports and a bi-directional enhanced parallel port
are also available.
Systems can be purchased with the Tru64 UNIX operating system
installed, or they can be purchased without any operating
system, allowing customers to install Linux.
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