Seagate Marathon 420sl Manual

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .Marathon SL Family. . . . . . . . . . . . . . . . . . . . . . . . .

Specification Summary tableThe specifications listed in this table are for quick reference. For detailson specification measurements or definitions, p

Drive Specification Marathon 420slAverage latency (msec) 6.67Power-on to ready (seconds, typical) 7Standby to ready (seconds, typical) 3Spinup power a

1.0 Drive specificationsUnless otherwise noted, all specifications are measured under ambientconditions, at 25°C, at sea level, and nominal power.1.1

1.3 Recording and interface technologyInterface ATARecording method RLL (1,7)Recording density (bits/inch) 90,000Flux density (flux change/inch) 67,50

1.5 Seek timeAll seek times are measured using a 25-MHz 486 AT computer (or faster)with a 8.3-MHz I/O bus. The measurements are taken with nominal pow

level. Active mode current and power are measured with a 32-msec delaybetween each operation and the drive in default logical geometry.Seeking power a

1.7.2 Power recoveryExcept during execution of a write command, the drive’s power can beinterrupted without adversely affecting the drive or previousl

utility. In Standby mode, the buffer remains enabled, the heads areparked and the spindle is at rest. The drive accepts all commands andreturns to Act

1.8.4 AltitudeOperating –300 m to 3,040 m (–1,000 ft to 10,000 ft)Nonoperating –300 m to 12,190 m (–1,000 ft to 40,000 ft)1.8.5 ShockAll shock specifi

1.8.6.1 Operating vibrationThe following table lists the maximum vibration levels that the drive mayexperience without incurring physical damage or de

1.11 Agency certification1.11.1 Safety certificationThe Marathon 420sl is listed in accordance with UL 1950 and CSA C22.2(950-M89) and meets all appli

How to Identify and Resolve Radio-Television Interference Problems.This booklet is available from the Superintendent of Documents,US Government Printi

2.0 Drive mounting and configuration2.1 Handling and static-discharge precautionsAfter unpacking, and before installation, the drive may be exposed to

Master/slaveconfigurationjumpersPin 1Pin 20 removedfor keyingCircuit boardB DA CDrive is master; slave may be detected using DASP– sig

Jumperfor pinsA and BJumperfor pins C and D ConfigurationRemoved Removed Drive is master; slave drive may be detectedusing DASP– signal. CSEL is ignor

4X 3 mm × 0.5 mm,0.15 in (3.81mm)min. full thread0.0002.430 ± 0.010(61.72 ± 0.25)0.0001.227 ± 0.020(31.17 ± 0.51)4.025 (102.23) max.(head/disc as

2.5 ATA interface connectorThe drive connector is a 44-conductor connector with 2 rows of 22 malepins on 0.079-inch (2-mm) centers (see Figure 4). The

3.0 ATA interfaceThese drives use the industry-standard ATA interface. The drives sup-port both 8-bit and 16-bit data transfers. They support ATA prog

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .Marathon SL Family. . . . . . . . . . . . . . . . . . . . . . . . .

3.2 ATA Interface commands3.2.1 Supported ATA commandsThe following table lists ATA-standard and Seagate-specific drive com-mands that the Marathon 42

Command nameCommandcodeSupported byMarathon 420slWrite DMA (no retry) CBHYesWrite Long (w/retry) 32HYesWrite Long (no retry) 33HYesWrite Multiple C5HY

Reset–GroundDD7DD8DD6DD9DD5DD10DD4DD11DD3DD12DD2DD13DD1DD14DD0DD15Ground(removed)DMARQGroundDIOW–GroundDIOR–GroundIORDYCSEL

The following commands are specific to the Marathon 420sl or containdrive-specific features.3.2.2 Identify Drive commandThe Identify Drive command (co

Word DescriptionMarathon420sl23–26Firmware revision (8 ASCII character string): xx = ROM version, ss.tt = RAM versionxx.ss.tt27–46Drive model number:

Word DescriptionMarathon420sl67Minimum PIO cycle time without IORDY flowcontrol (363 nsec)016BH68Minimum PIO cycle time with IORDY flowcontrol (120 ns

3.2.3 Set Features commandThis command controls the implementation of various features that thedrive supports. When the drive receives this command, i

Appendix. Compatibility NotesECC testingWhen a Marathon 420sl performs hardware-based ECC error correctionon the fly, the drive does not report an ECC

Seagate Technology, Inc.920 Disc Drive, Scotts Valley, California 95066, USAPublication Number: 36293-201, Printed in USA

1995 Seagate Technology, Inc. All rights reservedPublication Number: 36293-201, Rev. AAugust 16, 1995Seagate, Seagate Technology and the Seagate logo

ContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Specification Summary table . . . . .

1.11.2 FCC verification . . . . . . . . . . . . . . . . . . . . 132.0 Drive mounting and configuration . . . . . . . .

FiguresFigure 1. Typical startup and operation current profile for a Marathon 420sl . . . . . . . . . . . . . . . . . . . . . .

IntroductionThe Marathon 420sl provides high storage capacity in a small, low-profilehard disc drive.Key features:• Low power consumption• Low profile