Seagate CHEETAH X15-36LP User Manual
The world’s fastest, most reliable hard drive
CHEETAH X15-36LP
U P T O 4 0 P E R C E N T M O R E I / O ’ s P E R S E C O N D
BEST-FIT ENTERPRISE APPLICATIONS
E-COMMERCE
SERVERS
TRANSACTION
PROCESSING
SAN ENVIRONMENTS
■This second-generation, 15K-RPM drive has seek times at 3.6 msec and access times at 5.6 msec—30 percent faster than the 10K-RPM drives.
2000. Secondqualifications,
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rating at 1,200,000
■Adopted by most major OEMs, the first-generation Cheetah X15 was the most awarded and acclaimed Seagate drive ever.
18.4 TO 36.7 GBYTES • 15K RPM • ULTRA160 SCSI, ULTRA320 SCSI, 2 GBIT/SEC FIBRE CHANNEL
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THE 15K-RPM CHEETAH X15-36LP, UP TO 40 PERCENT MORE I/Os PER SECOND
Second-generation, 15K-RPM
Cheetah Technology
■Seek times at 3.6 msec and data access times at 5.6 msec —30 percent faster than the 10K-RPM drives.
■Up to 40 percent more I/O’s per second than the 10K-RPM drives.
■Second-generation technology backed by OEM qualifications, field results, and customer satisfaction.
■Industry’s highest rating at 1,200,000 hours MTBF, and at 0.73 percent AFR.
Seagate’s 3D Defense System™—
No One Does More to Protect Your Drives
Our 3D Defense System defends against every major challenge to high-performance data storage.
Drive Defense
■SeaShell packaging provides more than 1,000 Gs shock protection during handling, reducing returns up to 70 percent.
Data Defense
■Seagate’s Advanced Multidrive System
(SAMS) reduces effects of rotational vibration generated by drives operating simultaneously.
Diagnostic Defense
■SeaTools Available in Desktop or Enterprise editions, this disc diagnostic utility prevents the expense and inconvenience of returning healthy drives.
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CHEETAH X15-36LP |
36.7 GB |
36.7 GB |
18.4 GB |
18.4 GB |
KEY ADVANTAGES |
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Model Number |
ST336752LC/LW/FC |
ST336732LC/LW |
ST318452LC/LW/FC |
ST318432LC/LW |
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C A P A C I T Y A N D I N T E R FA C E |
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Formatted-512 bytes/sector (Gbytes) |
36.7 |
36.7 |
18.4 |
18.4 |
Capacities in the sweet spot of the market |
Interface |
Ultra160 SCSI |
Ultra320 SCSI |
Ultra160 SCSI |
Ultra320 SCSI |
Up to 320-Mbyte-per-second transfer rate. Includes packetization and QAS. |
External Transfer Rate (Mbytes/sec) |
160 |
320 |
160 |
320 |
Fully compatible with Ultra160. |
Interface |
2 Gbits/sec FC |
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2 Gbits/sec FC |
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Seagate’s FC experience and robust drives make it the number-one |
External Transfer Rate (Mbytes/sec) |
200 |
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200 |
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choice of major OEMs. |
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P E R F O R M A N C E |
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Spindle Speed (RPM) |
15K |
15K |
15K |
15K |
Economies of Speed for Transaction Processing |
Latency, average (msec) |
2.0 |
2.0 |
2.0 |
2.0 |
Up to 40 percent more IOPS than the new generation 10K-RPM drives. |
Seek Time |
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Achieves rapid access to data with fewer drives than 10K. Performance |
Average read/write (msec) |
3.6/4.2 |
3.6/4.2 |
3.6/4.2 |
3.6/4.2 |
is maximized with Seagate’s advanced caching and command-queuing |
Track-to-Track read/write (msec) |
0.3/0.4 |
0.3/0.4 |
0.3/0.4 |
0.3/0.4 |
algorithms and Seagate’s superior adjacent-track seek performance. |
Transfer Rate |
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SAMS keeps performance on track by reducing the impact of rotational |
Internal (Mbits/sec) |
522–709 |
522–709 |
522–709 |
522–709 |
vibration in multidrive environments. |
Internal Formatted (Mbytes/sec) |
51–69 |
51–69 |
51–69 |
51–69 |
41 percent faster transfer rate than the Cheetah X15. Enhanced |
Cache Multisegmented (Mbytes) |
8 |
8 |
8 |
8 |
with Seagate’s Nonlinear Optimized Formatting. |
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C O N F I G U R AT I O N / O R G A N I Z AT I O N |
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Discs/Heads |
4,8 |
4,8 |
2,4 |
2,4 |
Areal Density is maximized with Seagate’s Zero Acceleration Path |
Sectors per drive, 512 bytes/sector |
71,687,369 |
71,687,369 |
35,843,670 |
35,843,670 |
enhanced track spacing, allowing for a lower disc and head count |
Cylinders |
18,479 |
18,479 |
18,479 |
18,479 |
bringing greater reliability. |
Recording Method PRML |
EPRML |
EPRML |
EPRML |
EPRML |
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R E L I A B I L I T Y / D AT A I N T E G R I T Y |
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Error Rate |
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Seagate has proven reliability leadership with its first-generation |
Recoverable, per bits read |
10 per 1012 |
10 per 1012 |
10 per 1012 |
10 per 1012 |
Cheetah X15. Highest reliability rating in the industry. |
Nonrecoverable, per bits read |
1 sector per 1015 |
1 sector per 1015 |
1 sector per 1015 |
1 sector per 1015 |
Incorporates the most advanced elements of 3D Defense. |
Seek Errors, per seek |
10 per 108 |
10 per 108 |
10 per 108 |
10 per 108 |
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E N V I R O N M E N T A L |
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Acoustics, Idle (bels) |
3.7 |
3.7 |
3.5 |
3.5 |
Seagate’s sound barrier technology ensures whisper-quiet acoustics. |
Temperature: Operating/Nonoperating (ºC) |
5 to 55/–40 to 70 |
5 to 55/–40 to 70 |
5 to 55/–40 to 70 |
5 to 55/–40 to 70 |
Temperature sensor warns host when the temperature exceeds limits. |
Shock: Operating/Nonoperating 2 msec (Gs) |
15/250 |
15/250 |
15/250 |
15/250 |
3D Drive Defense’s SeaShell brings the nonop shock to over 1,000 Gs. |
Vibration: Operating/Nonoperating <400 Hz (Gs) |
0.5/2.0 |
0.5/2.0 |
0.5/2.0 |
0.5/2.0 |
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P O W E R R E Q U I R E M E N T S |
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+12, +5 VDC ± 5% (amps) typ operating SCSI, FC |
0.98/0.89, 0.98/0.99 |
0.98/0.89 |
0.79/0.88, 0.79/0.99 |
0.79/0.88 |
Power is within the envelope of 10Kand 15K-RPM products. |
Power, Idle: SCSI/FC (watts) |
12/13 |
12 |
10.3/11 |
10.3 |
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P H Y S I C A L |
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Height (in/mm) |
1.0/25.4 |
1.0/25.4 |
1.0/25.4 |
1.0/25.4 |
Seagate’s Customer Service: rated above average to excellent by 95 |
Width (in/mm) |
4.0/101.6 |
4.0/101.6 |
4.0/101.6 |
4.0/101.6 |
percent of the 2,000 customers surveyed who used Seagate’s service. |
Depth (in/mm) |
5.75/146.6 |
5.75/146.6 |
5.75/146.6 |
5.75/146.6 |
Seagate’s team brings superior breadth and depth of experience to you. |
Weight (lb/kg) |
1.5/ 0.680 |
1.5/0.680 |
1.5/0.680 |
1.5/0.680 |
In the complex world of storage design, support is often the deciding factor. |
www.seagate.com |
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1-800-732-4283 (1-800-SEAGATE) |
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CORPORATE HEADQUARTERS |
Seagate Technology LLC. 920 Disc Drive, Scotts Valley, California, 95066, United States 831-438-6550 |
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ASIA/PACIFIC |
Seagate Technology International Ltd. 151 Lorong Chuan, New Tech Park #06-01, Singapore 556741, 65-488-7200 |
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EUROPE, MIDDLE EAST AND AFRICA |
Seagate Technology SA 62 bis, avenue André Morizet, 92643 Boulogne-Billancourt Cedex, France 33 1-41 86 10 00 |
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© 2001 Seagate Technology LLC. All rights reserved. Printed in USA. Seagate, Seagate Technology and the Seagate logo are registered trademarks of Seagate Technology LLC. Cheetah, SeaShell, Seagate’s |
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Advanced Multidrive System and the 3D Defense System are either registered trademarks or trademarks of Seagate Technology LLC. Other product names are registered trademarks or trademarks of their owners. |
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Seagate reserves the right to change, without notice, product offerings or specifications. (CS1528) Publication Number: 1536-001, June 2001 |
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