SEAGATE TECHNOLOGY, INC. Customer Technical Support FAX Network +1 408 438-8137 Customer Technical Support Bulletin Boards (300-9600, 8-N-1) /----------------------------------+---------------------------------\ | United States +1 408 438-8771 | United Kingdom +44 628 478011 | +----------------------------------+---------------------------------| | Germany +49 89 140-9331 | Singapore +65 227-2217 | \----------------------------------+---------------------------------/ (C)opyright 1994 ST-5850A (Decathlon 850 AT) +===========+ # REAR VIEW # +===========+ 40 pin I/O Cable Connection | J1 #========= =========# /---------\ TOP (HDA) ======#::::::::::o::::::::1#=| 0 0 0 0 |== \==========|=========/ \-5-G-G-12/ BOTTOM | ST-5850A \--- pin-20 removed +==============+ # Front View # +==============+ /-------------------- Slave drive ON (OFF for Master) | /------------------ Slave Present (used on Master) | | /---------------- Cable Select | | | /-------------- Ext. Spindle Clock Synch (TOP) | | | | /------------ Remote LED (9-, 10+) | | | | | /---------- Reserved | | | | | | /-pin-16 /34 J8 o o o o o o o o o o o o o o o o Option Block =1o o o o o o o o o o o o o o o o o=======PWA========== | | \+/ \+/ \--+----/ (BOTTOM) | | | | | pin-14 removed --/ | | | \---- Reserved Spare Jumper ----/ | \---------- Spare Jumpers Dual-Drive Emulation -------/ (requires two jumpers) Jumpers on 15-16, 21-22, 23-24 are spares. Dual-Drive Emulation requires jumpers on both 17-18 and 19-20. Cable Select also requires Slave and Slave Present jumpers ON. ST-5850A Decathlon 850 UNFORMATTED CAPACITY _____________________ FORMATTED CAPACITY (xx SECTORS) __________854.7 ACTUATOR TYPE ____________________________VOICE COIL CYLINDERS __PHYSICAL______________________4,085 HEADS ______PHYSICAL______________________4 DISCS (3.5 in) ___________________________2 MEDIA TYPE _______________________________THIN FILM HEAD TYPE ________________________________THIN FILM RECORDING METHOD _________________________ZBR RLL (1,7) INTERNAL TRANSFER RATE (Mbits/sec) _______32.45 to 61.65 EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 16.6 PIO MODE _________________________________4 DMA SUPPORT ______________________________EISA Type B SPINDLE SPEED (RPM) ______________________5,376 AVERAGE LATENCY (mSEC) ___________________5.56 BUFFER ___________________________________256 Kbyte SeaCache Read/Write Multiple, Read Look-Ahead, Multi-Segmented INTERFACE ________________________________AT SECTORS PER DRIVE (LBA mode) _____________1,669,260 TPI (TRACKS PER INCH) ____________________4,250 BPI (BITS PER INCH) ______________________69,355 AVERAGE ACCESS (ms) ______________________12 SINGLE TRACK SEEK (ms) ___________________3.5 MAX FULL SEEK (ms) _______________________25 MTBF (power-on hours) Office _____________500,000 SHOCK (G's): operating (Read/Write) __________2 nonoperating ____________________75 ACOUSTICS (dBa) (typ/max) ________________30/38 POWER DISSIPATION (watts) ________________ POWER REQUIREMENTS: +12V START-UP (amps) _1.9 POWER MANAGEMENT (Watts): ACTIVE _______________7.0 IDLE _________________3.10 STANDBY ______________1.00 WRITE PRECOMP (cyl) ______________________N/A REDUCED WRITE CURRENT (cyl) ______________N/A LANDING ZONE (cyl) _______________________AUTO IBM AT DRIVE TYPE ________________________* Physical: Height (inches/mm): 0.748/19 Width (inches/mm): 4.00/101.6 Depth (inches/mm): 5/127 Weight (lbs/kg): 1.0/0.45 * MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE. ALSO, CHECK TO SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE AVAILABLE. (see below) Possible translations: This translation is generally acceptable, as is, for non-DOS operating systems: 1656 cyl, 16 heads, 63 sectors = 854,654,976 DOS operating systems may require a system bios that accepts larger values for the CMOS head parameter which lowers cylinders below 1024: 828 cyl, 32 heads, 63 sectors = 854,654,976 Other FULL-CAPACITY solutions for DOS operating systems include third-party drive preparation software or bios driven host adapters. Otherwise, capacity may be limited to: 827 cyl, 16 heads, 63 sectors = 426,811,392 (Master) 827 cyl, 16 heads, 63 sectors = 426,811,392 (Slave see Dual Drive emulation jumper) Note: A "custom" or "user-definded" CMOS drivetype may ask for a numerical value for the Write Precompensation cylinder and for the Landing Zone cylinder. A basic rule-of-thumb for drive models that do not require the old Write Precomp technique or a Landing Zone because they are Auto-Parking is to add 1 to the cylinder value being used. As an example: If cylinders equaled 820, then both Write Precomp and Landing Zone would be entered as 821. Some BIOS will convert this to 65535 or -1, which are functionally equivalent to "none (not used)". PHYSICAL/LOGICAL equivalent to NATIVE/TRANSLATION ZBR = Zone Bit Recording = Variable sectors per track Already low-level formatted at the factory. Since a User-definable or Custom translation geometry may be used, it is imperative that the values be written down and kept with your permanent records for retrieval in the event of CMOS battery failure. Seagate reserves the right to change, without notice, product offerings or specifications. (12/23/94)