SEAGATE TECHNOLOGY, INC. 1-800-SEAGATE http://www.seagate.com (C)opyright 1995 ST-18771N Ultra-SCSI (Barracuda 8) ÉÍÍÍÍÍÍÍÍÍÍÍ» º REAR VIEW º (ST-18771N) ÈÍÍÍÍÍÍÍÍÍÍͼ 50 pin I/O Cable Connection ³ J1ÕÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ1¸ /ÄÄÄÄÄÄÄÄÄ\ TOP (HDA) ͵:::::::::::::::::::::::::Æͳ 0 0 0 0 ³ÍÍ ÔÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ; ÀÄ5ÄGÄGÄ12Ù BOTTOM ÉÍÍÍÍÍÍÍÍÍÍÍ» º SIDE VIEW º (ST-18771N) ÈÍÍÍÍÍÍÍÍÍÍͼ BACK Õ͸ J2 12345678 TOP (HDA) FRONT OF J1ÆÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ OF DRIVE Ô; :::::::: BOTTOM DRIVE ³³³³³³³³ ³Terminator Power Ù³³³³³³À Enable T-Res (N model only) Ú´Terminator Power ÄÙ³³³³ÀÄ Start Delay (12 secs * ID) ³ Reserved ÄÄÙ³³ÀÄÄ Motor Start ³ Parity Disable ÄÄÄÙÀÄÄÄ Write Protect ³ ³ ³ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ÀÄ´ Termination Power-source Table ³ ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ÍÍÍÍÍ....ÍÍÍÍÍ....ÍÍÍÍÍPWA edgeÍÍÍÍÍ ³ ³ ³ ³ 1 2 1 2 1 2 ³ ³ ÖÄ· ÖÄ· A Drive Supplies Bus ³ ³ ºøºø øºøº ÖøÄø· B Drive Supplies Own ³ ³ Óø½ø øÓø½ ÓøÄø½ C Bus Supplies Drive ³ ³ A B C ³ ÀÄÄÄÄÄÄÄÄÄDefaultÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ Note: ND drives do not have internal terminators or any other way of adding internal terminators to the drive; use external active termination if required. ÉÍÍÍÍÍÍÍÍÍÍÍÍ» º FRONT VIEW º (ST-18771N) ÈÍÍÍÍÍÍÍÍÍÍÍͼ ÚÄÄ´Reserved. Shipped with cover installed. ³ ÀDo not remove. Do not install jumpers TOP (HDA) ÕØÍÍ͸ 1 ÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͵::::³::::::ÆÍÍ * BOTTOM ÔÍÍÍ;123456 ³ J6 ³³³³³³ LED ÄÙ ³³³³³³ Remote LED Ù³³³³À ID 1 (pin-11 +5v) ³³³ÀÄ ID 2 Reserved ÄÁÙÀÄÄ ID 4 ST-18771N UNFORMATTED CAPACITY (MB) ________________11300 FORMATTED CAPACITY (MB) __________________8700 AVERAGE SECTORS PER TRACK ________________ rounded down ACTUATOR TYPE ____________________________ROTARY VOICE COIL TRACKS ___________________________________105,460 CYLINDERS ________________________________5,273 user HEADS ______PHYSICAL______________________20 DISCS (3.5 in) ___________________________11 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________PRML (0,6,6) INTERNAL TRANSFER RATE (mbits/sec)________75 to 120 EXTERNAL TRANSFER RATE (mbyte/sec) _______20 Sync SPINDLE SPEED (RPM) ______________________7,200 AVERAGE LATENCY (mSEC) ___________________4.17 BUFFER (/optional)________________________512/2048 KByte Read Look-Ahead, Adaptive, Multi-Segmented Cache INTERFACE ________________________________Ultra-SCSI ASA II BYTES PER TRACK __________________________70,830 to 111,460 SECTORS PER DRIVE ________________________16,997,187 TPI (TRACKS PER INCH) ____________________ BPI (BITS PER INCH) ______________________ AVERAGE ACCESS (ms) (read/write)__________8.0/9.0 Drive level without controller overhead SINGLE TRACK SEEK (ms) ___________________0.6/1.1 MAX FULL SEEK (ms) _______________________19/20 MTBF (power-on hours) ____________________1,000,000 POWER REQUIREMENTS: +12V START-UP (amps) _2.2 +12V TYPICAL (amps) __0.7 idle +5V START-UP (amps) __ +5V TYPICAL (amps) ___0.8 idle IDLE (watts) _________12.4 LANDING ZONE (cyl) _______________________AUTO PARK IBM AT DRIVE TYPE ________________________0 or NONE Physical: Height (inches/mm): 1.63/41.4 Width (inches/mm): 4.00/101.6 Depth (inches/mm): 5.75/146.1 Weight (lbs/kg): 2.3/1.04 Already low-level formatted at the factory with 9 spare sectors per cylinder and 1 spare cylinder per unit. ZBR = Zone Bit Recording = Variable sectors per track Seagate reserves the right to change, without notice, product offerings or specifications. (01/03/96)