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Cheetah 36XL Family:
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ST336705LW/LC
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ST318405LW/LC
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ST39205LW/LC
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cheetah 36XL Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST336705LW/LC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST318405LW/LC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST39205LW/LC . . . . . . . . . . . . . . . . . . . . .
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© 2001 Seagate Technology LLC All rights reserved Publication number: 75789517, Rev. E October 2001 Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology LLC. Cheetah, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are either registered trademarks or trademarks of Seagate Technology LLC. Other product names are registered trademarks or trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications. No part
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Revision status summary sheet Revision Date Writer/Engineer Sheets Affected Rev. A 12/11/2000 K. Schweiss/B. Reynolds 1/1, v thru ix, 1-83. Rev. B 02/27/2001 K. Schweiss/A. Steele 4. Rev. C 05/24/2001 K. Schweiss/B. Reynolds 4, 51, 53, and 55. Rev. D 07/30/2001 K. Schweiss/A. Steele 3 and 38. Rev. E 10/09/2001 K. Schweiss/B. Reynolds 18, 40-42 ,49, 51-56, and 58. Notice. Product Manual 75789517 is Volume 1 of a two-volume document with the SCSI interface information in the SCSI Interfa
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Cheetah 36XL Product Manual, Rev. E v Contents 1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Applicable standards and reference documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.1 Electromagnetic
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vi Cheetah 36XL Product Manual, Rev. E 6.4 Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 6.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 6.4.3 Effective altitude (sea level). . . . . . . . . . . . . . .
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Cheetah 36XL Product Manual, Rev. E vii List of Figures Figure 1. Cheetah 36XL family drive (ST336705LC shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. Cheetah 36XL family drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 3. Typical ST336705 drive +12 V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 4. Typical ST318405 drive +12 V current
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Cheetah 36XL Product Manual, Rev. E 1 1.0 Scope This manual describes Seagate Technology® LLC Cheetah 36XL™ disc drives. Cheetah 36XL drives support the Small Computer System Interface (SCSI) as described in the ANSI SCSI interface specifications to the extent described in this manual. The SCSI Interface Product Manual, part num- ber 75789509, describes general SCSI interface characteristics of this and other families of Seagate drives. The SCSI Interface Product Manual references information fr
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2 Cheetah 36XL Product Manual, Rev. E
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Cheetah 36XL Product Manual, Rev. E 3 2.0 Applicable standards and reference documentation The drive has been developed as a system peripheral to the highest standards of design and construction. The drive depends upon its host equipment to provide adequate power and environment in order to achieve opti- mum performance and compliance with applicable industry and governmental regulations. Special attention must be given in the areas of safety, power distribution, shielding, audible noise control
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4 Cheetah 36XL Product Manual, Rev. E Australian C-Tick If this model has the C-Tick Marking it complies with the Australia/New Zealand Standard AS/NZS3548 1995 and meets the Electromagnetic Compatibility (EMC) Framework requirements of Australia’s Spectrum Man- agement Agency (SMA). Korean MIC If this model has the Korean Ministry of Information and Communication (MIC) logo, it complies with paragraph 1 of Article 11 of the Electromagnetic Compatibility (EMC) Control Regulation and meets the El
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Cheetah 36XL Product Manual, Rev. E 5 3.0 General description Cheetah 36XL drives combine giant magnetoresistive (GMR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a wide SCSI Ultra160 interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, net- work servers, mainframes, and supercomputers. Ultra160 SCSI uses negotiated transfer rates. These transfer rates will occ
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6 Cheetah 36XL Product Manual, Rev. E An automatic shipping lock prevents potential damage to the heads and discs that results from movement dur- ing shipping and handling. The shipping lock automatically disengages when power is applied to the drive and the head load process begins. Cheetah 36XL drives decode track 0 location data from the servo data embedded on each surface to eliminate mechanical transducer adjustments and related reliability concerns. A high-performance actuator assembly wit
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Cheetah 36XL Product Manual, Rev. E 7 3.1 Standard features The Cheetah 36XL family has the following standard features: Integrated Ultra160 SCSI controller Multimode SCSI drivers and receivers—single-ended (SE) and low voltage differential (LVD) 16 bit I/O data bus Asynchronous and synchronous data transfer protocol Firmware downloadable via SCSI interface Selectable even byte sector sizes from 512 to 4,096 bytes/sector Programmable sector reallocation scheme Flawed sector reall
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8 Cheetah 36XL Product Manual, Rev. E 3.5 Formatted capacities Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per sector. The following table shows the standard OEM model read capacities data. Total LBAs = read capacity data (shown below) +1. Formatted (data block size 512 bytes/sector) [1] ST336705 445DCC9h (36.704 GB) [2] ST318405 222EE55h (18.352 GB) [2] ST39205 111772Ah (9.176 GB) [2] Notes. [1] Sector size selectable at format time.
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Cheetah 36XL Product Manual, Rev. E 9 4.0 Performance characteristics 4.1 Internal drive characteristics (transparent to user) ST336705 ST318405 ST39205 Drive capacity 36.704 18.352 9.176 GByte (formatted, rounded off values) Read/write heads 8 4 2 Bytes/track 241,128 241,128 241,128 Bytes (average, rounded off values) Bytes/surface 4,577.5 4,577.5 4,577.5 Mbytes (unformatted, rounded off values) Tracks/surface (total) 19,036 19,036 19,036 Tracks (user accessible) Tracks/inch 24,406 24,406 24
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10 Cheetah 36XL Product Manual, Rev. E SCSI interface data transfer rates (asynchronous): Maximum instantaneous 8 bit wide 5.0 Mbytes/sec [4] Maximum instantaneous 16 bit wide 10.0 Mbytes/sec [4] Synchronous formatted transfer rates: Ultra2 SCSI Ultra160 SCSI In SCSI Wide (16 bit) 10.0 to 80 Mbytes/sec 10.0 to 160 Mbytes/sec [6] Sustainable data transfer rates: Minimum 23 Mbytes/sec Average 33 Mbytes/sec Maximum 37 Mbytes/sec Sector Sizes: Default 512 byte user data blocks Variable 512 to 4,096
