Seagate U4 Family Manual

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .U4 Family. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 U4 Family Product Manual, Rev. DSpecification summary tableThe specifications listed in this table are for quick reference. For detailson specificat

U4 Family Product Manual, Rev. D 3 Track-to-track seek time (msec typical) 2.0 (read), 2.75 (write)Average seek time (msec typical) 10.5 (read), 11.5

4 U4 Family Product Manual, Rev. DVibration, nonoperating 5 Gs (0 to peak, 5–350 Hz)Drive acousticsSound powerIdle modeSeek mode3.3 (typical), 3.7(max

U4 Family Product Manual, Rev. D 5 1.0 Drive specificationsUnless otherwise noted, all specifications are measured under ambientconditions, at 25°C,

6 U4 Family Product Manual, Rev. D1.3 Recording and interface technology1.4 Physical characteristics1.5 Seek timeSeek measurements are taken with n

U4 Family Product Manual, Rev. D 7 •Average seek time is a true statistical random average of at least 5,000measurements of seeks between random track

8 U4 Family Product Manual, Rev. D•Seek ModeDuring seek mode, the read/write actuator arm moves toward aspecific position on the disc surface and does

U4 Family Product Manual, Rev. D 9 1.7.1.1 Typical current profileFigure 1 shows a typical current profile. Figure 1. Typical startup and operatio

10 U4 Family Product Manual, Rev. D1.7.2 Conducted noiseInput noise ripple is measured at the host system power supply acrossan equivalent 80-ohm res

U4 Family Product Manual, Rev. D 11 drive buffer is enabled, the heads are parked and the spindle is at rest.The drive accepts all commands and return

12 U4 Family Product Manual, Rev. D1.8.3.2 Wet bulb temperature1.8.4 Altitude1.8.5 ShockAll shock specifications assume that the drive is mounted

U4 Family Product Manual, Rev. D 13 1.8.6.1 Operating vibrationThe following table lists the maximum vibration levels that the drive may expe-rience

14 U4 Family Product Manual, Rev. D1.10 Electromagnetic susceptibilityThe drive operates without errors when subjected to the following:1.11 Reliabi

U4 Family Product Manual, Rev. D 15 comply with the directives when used in the test systems, we cannotguarantee that all systems will comply with the

16 U4 Family Product Manual, Rev. DIf necessary, you should consult your dealer or an experienced radio/television technician for additional suggestio

U4 Family Product Manual, Rev. D 17 2.0 Configuring and mounting the driveThis section contains the specifications and instructions for configuringan

18 U4 Family Product Manual, Rev. D2.2 Jumper settings2.2.1 Master/slave configurationThe options jumper block (J8) shown in Figure 2 is used to con

U4 Family Product Manual, Rev. D 19 2.2.2 Cable-select optionComputers that use cable-select determine the master and slave drivesby selecting or des

20 U4 Family Product Manual, Rev. D1.00 ± 0.028(25.4 ± 0.7)3.72 ± 0.03(94.5 ± 0.8)4.00 ± 0.02(101.6 ± 0.5)3.750 ± 0.010 (95.25 ± 0.25)5.75 ± 0.03(146

U4 Family Product Manual, Rev. D 21 3.0 ATA interface These drives use the industry-standard ATA task file interface thatsupports 16-bit data transfe

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .U4 Family. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

22 U4 Family Product Manual, Rev. DFigure 4. I/O pins and supported ATA signalsReset–GroundDD7DD8DD6DD9DD5DD10DD4DD11DD3DD12DD2DD13DD1DD14DD0DD15Groun

U4 Family Product Manual, Rev. D 23 3.2 ATA Interface commands3.2.1 Supported ATA commandsThe following table lists ATA-standard commands that the d

24 U4 Family Product Manual, Rev. D3.2.2 Identify Drive commandThe Identify Drive command (command code ECH) transfers informationabout the drive to

U4 Family Product Manual, Rev. D 25 Word Description Value0Configuration information:• Bit 15: 0 = ATA; 1 = ATAPI• Bit 7: removable media• Bit 6: remo

26 U4 Family Product Manual, Rev. D27–46 Drive model number: (40 ASCII char-acters, padded with blanks to end of string)ST32112AST34311AST36421AST3842

U4 Family Product Manual, Rev. D 27 63 Multiword DMA active and modes supported (see note following this table)xx07H64 Advanced PIO modes supported (m

28 U4 Family Product Manual, Rev. D91–92 ATA-reserved0000H93 Hardware Reset Value (see description following this table)4000H94–127 ATA-reserved0000H1

U4 Family Product Manual, Rev. D 29 3.2.3 Set Features commandThis command controls the implementation of various features that thedrive supports. Wh

30 U4 Family Product Manual, Rev. DNote. At power-on, or after a hardware or software reset, the defaultvalues of the features are as indicated above.

U4 Family Product Manual, Rev. D 31

1999 Seagate Technology, Inc. All rights reservedPublication Number: SG35116-001, Rev. D, June 1999Seagate, Seagate Technology, the Seagate logo and

32 U4 Family Product Manual, Rev. D

U4 Family Product Manual, Rev. D 33

34 U4 Family Product Manual, Rev. DSeagate Technology, Inc.920 Disc Drive, Scotts Valley, California 95066, USAPublication Number: SG35116-001, Rev. D

U4 Family Product Manual, Rev. D iiiContentsSpecification summary table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.0 Drive speci

iv U4 Family Product Manual, Rev. D2.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . 172.1 Handling and static-discharg

U4 Family Product Manual, Rev. D vFiguresFigure 1. Typical startup and operation current profile . . . . . . . . . . . . 9Figure 2. Master/slave jump

vi U4 Family Product Manual, Rev. D.

U4 Family Product Manual, Rev. D 1 IntroductionThis manual describes the functional, mechanical and interface specifi-cations for the U4 ST38421A, ST