n-class specifications       N4000-100-440 N4000-300-4401 N4000-300-5501   N4000-100-220 N4000-100-330 N4000-200-4401 N4000-400-4401 N4000-400-5501 Product numbers A6449B A6450B A6451B A6452B A6453B Microprocessor supported PA-8500 @ 220 MHz PA-8500 @ 330 MHz PA-8500 @ 440 MHz PA-8500 @ 440 MHz PA-8600 @ 550 MHz Number of processors 1 CPU 1 CPU 1 to 21 CPUs 31 to 41 CPUs 31 to 41 CPUs Operating system support MPE/iX Release 7.0 MPE/iX Release 7.0 MPE/iX Release 7.01 MPE/iX Release 7.0 Exp. 11 MPE/iX Release 7.0 Exp. 11 Relative performance     18 (1 proc.) 463 (3 proc.) 583 (3 proc.)   9 13 333 (2 proc.) 573 (4 proc.) 723 (4 proc.) Memory (min./max.)     1GB / 16GB2 3GB / 16GB2 3GB / 16GB2   512MB / 16GB2 512MB / 16GB2 2GB / 16GB2 4GB / 16GB2 4GB / 16GB2 On-chip cache (data/instr)/CPU 1 MB / 512KB 1MB / 512KB 1MB / 512KB 1MB / 512KB 1MB / 512KB I/O slots 12 12 12 12 12 I/O devices           Internal disk drives 2 2 2 2 2 Internal disk capacity max. 72 GB 72 GB 72 GB 72 GB 72 GB External storage capacity max. using disk arrays 37 TB4 37 TB4 37 TB4 37 TB4 37 TB4 Tape drives max. 32 32 32 32 32 System printers max. 8 8 8 8 8 Serial printers max. 250 250 250 250 250 Connected workstations max. 3300 3300 3300 3300 3300 Standard I/O features Ultra2 LVD SCSI port, 10/100Base-TX LAN, 3x RS-232 ports for console and UPS connections, integrated Web Console Supported I/O connectivity Ultra2 SE/LVD SCSI (single and dual port); ULTRA HVD SCSI (single and dual port); 10/100Base-TX LAN; 802.5 FDDI via a switch; X.25 via a DTC; SNA and NS pt.-to-pt. via 8 channel ACC card 1 Multiprocessor support requires MPE/iX Release 7.0 Express 1. 2 Maximum memory size is limited to 2 GB with Release 7.0. Release 7.0 Express 1 will support maximum memory sizes of 16 GB. 3 Estimated performance as of February 1, 2001. 4 Maximum external disk capacity is limited to 12 TB with Release 7.0. Release 7.0 Express 1 will support maximum disk capacities of 37 TB.