Saturday, October 16, 2010

Xerox Alto

Monday, August 23, 2010

CDC Seagate Sabre 850 MB SMD hard disk drive

ST-8851J 97200-850 Sabre 4 UNFORMATTED CAPACITY _____________________851 FORMATTED CAPACITY (xx SECTORS) __________ AVERAGE SECTORS PER TRACK (with spares)___ ACTUATOR TYPE ____________________________STRAIGHT ARM TRACKS ___________________________________ CYLINDERS ________________________________1,381 HEADS ____________________________________15 DISCS (8 in) _____________________________9 MEDIA TYPE _______________________________OXIDE HEAD TYPE ________________________________THIN FILM RECORDING METHOD _________________________RLL (2,7) EXTERNAL TRANSFER RATE (mbytes/sec) ______2.46 SPINDLE SPEED (RPM) ______________________3,600 AVERAGE LATENCY (mSEC) ___________________8.33 BUFFER ___________________________________ INTERFACE ________________________________SMD O/E BYTES PER TRACK __________________________41,088 SECTORS PER DRIVE ________________________ BYTES PER CYLINDER _______________________616,320 TPI (TRACKS PER INCH) ____________________1,089 BPI (BITS PER INCH) ______________________13,387-19,816 AREAL DENSITY (MBits/sq in) ______________21.6 AVERAGE ACCESS (ms) ______________________15 SINGLE TRACK SEEK (ms) ___________________4 MAX FULL SEEK (ms) _______________________30 MTBF (power-on hours) Class A Room _______100,000 MTBF (power-on hours) Office _____________100,000 POWER DISSIPATION (watts/BTU) ____________95/324.2 POWER REQUIREMENTS: TYPICAL (watts) ______ MAXIMUM (watts) ______ USER MANUAL PART NUMBER __________________83325710 PARTS MANUAL PART NUMBER _________________83325700 MAINT. MANUAL PART NUMBER ________________83325720 THEORY MANUAL PART NUMBER ________________83325690 DIAGRAMS MANUAL PART NUMBER ______________83325730 OTHER ____________________________________Dual Access, Sweep Cycle Capability Physical: Height (inches/mm): 4.75/120.65 Width (inches/mm): 8.50/216 Depth (inches/mm): 14.7/373.38 Weight (lbs/kg): 32/15

Posted via email from DECpicted: naked VAX and PDP's pictures

Sunday, July 4, 2010

M792-YB bootstrap diode matrix

I had one of those at work, but one of my very clever colleague threw it to trash, with some other things he considered "obsolete". What an ass.

Posted via email from DECpicted: naked VAX and PDP's pictures