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 1991 ST-9052A /- 44-pin I/O Connector (* see below) | o o ::::::::::::o::::::::1 o o =P=W=A===========#================== | | | pin-20 removed for keying ---------------/ | | | | | | Drive is Master, no Slave drive present ------------------ 0 0 Drive is Master, Seagate Slave drive present ------------- 1 0 Drive is Slave to another ST9051A/ST9077A Master --------- 0 1 Reserved Position (Do Not Use) --------------------------- 1 1 * Drive uses +5vdc power supplied to the drive via the interface connector. The drive does NOT make use of a +12vdc power line. pin-41 +5vdc (Logic) pin-42 +5vdc (Motor) pin-43 Ground pin-44 Reserved ST-9052A UNFORMATTED CAPACITY (MB) ________________N/A FORMATTED CAPACITY (xx SECTORS) (MB) _____42.6 ACTUATOR TYPE ____________________________VOICE COIL TRACKS ___________________________________ CYLINDERS __PHYSICAL/LOGICAL______________NA/980 HEADS ______PHYSICAL/LOGICAL______________ /5 DISCS (2.5 in)____________________________1 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________ZBR RLL (2,7) TRANSFER RATE INTERNAL (mbits/sec)________up to 14.5 SPINDLE SPEED (RPM) ______________________3,450 AVERAGE LATENCY (mSEC) ___________________8.70 BUFFER ___________________________________32/64 KByte SeaCache Multisegmented cache INTERFACE ________________________________AT BUS SECTORS PER DRIVE ________________________83,300 TPI (TRACKS PER INCH) ____________________ BPI (BITS PER INCH) ______________________ AVERAGE ACCESS (ms) ______________________16 SINGLE TRACK SEEK (ms) ___________________5 MAX FULL SEEK (ms) _______________________27 MTBF (power-on hours) ____________________150,000 SHOCK (G's) operating/nonoperating _______10/150 POWER REQUIREMENTS: +5V START-UP (amps) __0.9 POWER MANAGEMENT (Watts): ACTIVE _______________1.9 IDLE _________________0.8 STANDBY ______________0.25 SLEEP ________________0.25 WRITE PRECOMP (cyl) ______________________N/A REDUCED WRITE CURRENT (cyl) ______________N/A LANDING ZONE (cyl) _______________________AUTO PARK IBM AT DRIVE TYPE ________________________* Physical: Height (inches/mm): 0.49/12.5 Width (inches/mm): 2.76/70.10 Depth (inches/mm): 4.01/101.9 Weight (oz/kg): 6.0/0.17 * 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 translation: 980 cyl, 5 heads, 17 sectors = 42,649,600 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 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. (10/21/91)