IBM Travelstar 25GS, 18GT, and 12GN 2.5-inch hard disk drives

Highlights

The IBM Travelstar* 25GS offers several industry firsts: a record-setting capacity of 25 GB, a media transfer rate of up to 181.2 Mbits/sec, and a disk rotational speed of 5400 RPM.

The new IBM Travelstar 18GT and 12GN hard drives provide areal densities of 10.1 Gbits/sq. in. and 6 GB of capacity per disk.

The IBM Travelstar 12GN has the industry's highest shock rating of 800 G/1 ms.

Fast Ultra-DMA interface transfer rates reach as high as 66 MB/sec.

An advanced electromechanical design provides exceptional storage capacities and superior shock ratings to improve reliability and ruggedness.

Leading-edge technology
Featuring a wide array of leading-edge technologies, the IBM Travelstar 25GS, 18GT, and 12GN mobile hard drives continue the tradition of IBM leadership in the mobile storage arena. These IBM Travelstar drives employ advanced design and engineering innovations to significantly increase shock resistance while simultaneously reducing heat and noise levels. As a result, the new IBM Travelstar drives are ideally suited for demanding, high-capacity Internet, digital audio, video streaming, and real-time multimedia applications -- whether users are in the office or on the road.

The innovative hard drive design combines IBM giant magnetoresistive (GMR) head technology, Partial Response Maximum Likelihood (PRML) digital channel, a head load/unload feature, a more rigid base casting than previous models, Enhanced Adaptive Battery Life Extender* (ABLE) 3.0, and state-of-the-art manufacturing techniques. This design provides the exceptional storage capacity, performance, power management, quality, and reliability required by today's notebook systems.

IBM Travelstar hard disk drive characteristics

Feature   Benefit   First 5400 RPM mobile hard drive   IBM Travelstar 25GS provides outstanding performance and seek times at near-desktop equivalence without sacrificing high capacity   First 25 GB mobile hard drive   IBM Travelstar 25GS has the capacity to enable mobile users to work with a new range of emerging storage-intensive applications   First 800 G/1 ms shock rating for a 2.5-inch mobile hard drive   IBM Travelstar 12GN provides exceptional ruggedness to help withstand shock while increasing drive reliability and extending drive lifetime   High areal density of 10.1 Gbits/sq. in. and 6 GB of capacity per disk   IBM Travelstar 18GT and 12GN maximize areal density to enable more data storage per disk in standard, compact packages   Fast Ultra-DMA 66 2.5-inch mobile hard drives   IBM Travelstar 25GS, 18GT, and 12GN all feature high data transfer rates to help ensure the ultimate performance possible   IBM drive fitness technologies   IBM DFT and S.M.A.R.T. capabilities help enhance reliability

Performance and reliability

IBM Travelstar drives include IBM drive fitness technologies, a set of diagnostic tools including IBM Drive Fitness Test* (DFT) and Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.). In addition, the new IBM Travelstar 25GS, 18GT, and 12GN drives employ a thermistor, an adaptive control device that helps maintain high performance and fast seek times at high environmental temperatures.

	IBM family of Travelstar 25GS, 18GT, and 12GN hard disk drives at a glance
Product name Travelstar 25GS Travelstar 18GT Travelstar 12GN   Model DARA-225000 DARA-218000/ 215000 DARA-212000/ 209000/ 206000   Configuration   Interface ATA-4 ATA-4 ATA-4   Capacity (GB) 25.3 18.1/ 15.1 12.0/ 9.0/ 6.0   Sector size (bytes) 512 512 512   Recording zones 12 12 12   User cylinders 16,064 17,088 17,088   Data heads 10 6/ 5 4/ 3/ 2   Disks 5 3/ 3 2/ 2/ 1   Max. areal density   (Gbits/ sq. in.) 8.8 10.1 10.1   Max. recording   density (KBPI) 327.4 356.0 356.0   Track density   (KTPI) 26.8 28.5 28.5   Drive Fitness Test Supported Supported Supported   Performance   Data buffer (KB) 512² 512² 512²   Rotational speed   (RPM) 5411 4200 4200   Latency (average   ms) 5.5 7.1 7.1   Media transfer   rate (Mbits/sec) 105.1- 181.2 85.5- 161.6 85.5- 161.6   Interface transfer   rate (MB/sec) 66.6 Ultra-DMA mode 4 16.6 PIO mode 4 66.6 Ultra-DMA mode 4 16.6 PIO mode 4 66.6 Ultra-DMA mode 4 16.6 PIO mode 4   Seek time (ms)           Average (typical) 12.0 12.0 12.0     Single track      (typical) 2.5 2.5 2.5     Full stroke      (typical) 23.0 23.0 23.0   Reliability   Error rate   (nonrecoverable) < 1 per 1.0E13 bits transferred < 1 per 1.0E13 bits transferred < 1 per 1.0E13 bits transferred   Load/unload   cycles 300,000 300,000 300,000   Power   Voltage   requirement (VDC) +5 (+/- 5 %) +5 (+/- 5 %) +5 (+/- 5 %)   Dissipation (W)             Startup       (max. peak) 5.0 4.7 4.7       Seek (typical) 2.6 2.3 2.3       Read (typical) 2.5 2.1 2.0       Write (typical) 2.7 2.2 2.1       Performance       idle (typical) 2.0 1.85 1.85       Active idle       (typical) 1.3 0.95 0.85       Low power       idle (typical) 0.85 0.65 0.65       Standby       (typical) 0.25 0.25 0.25       Sleep (typical) 0.1 0.1 0.1   Power   consumption   efficiency  (watts/MB) 0.00003 0.00004/ 0.00004 0.00005/ 0.00007/ 0.00001   Physical size   Height (mm) 17.0 12.5 9.5   Width (mm,   nominal) 69.9 69.9 69.9   Depth (mm,   nominal) 100.2 100.2 100.2   Weight (g) 185.0 135.0 99.0   Environmental characteristics Operating Nonoperating   Ambient temperature 5 to 55°C -40 to 65°C   Relative humidity (noncondensing) 8% to 90% 5% to 95%   Maximum wet bulb   (noncondensing) 29.4°C 40.0°C   Shock (half sine wave) Travelstar 25GS: 150 G/ 2 ms Travelstar 18GT: 175 G/ 2 ms Travelstar 12GN: 175 G/ 2 ms Travelstar 25GS: 500 G/ 2 ms Travelstar 18GT: 700 G/ 1 ms Travelstar 12GN: 800 G/ 1 ms   Vibration           Random (RMS) 0.67 G (5-500 Hz) 3.01 G (2.5-500 Hz)       Swept swine 1 G 0-peak (5-500 Hz) 5 G 0-peak (10-500 Hz)   Warranty   Three years* Three years* Three years*

IBM quality, support, and service
The new IBM Travelstar mobile hard drives share common field-proven components to provide manufacturers with superior-quality hard drives backed by a three-year warranty and IBM technical support and services.

IBM Storage Systems Division
5600 Cottle Road
San Jose, CA 95193

www.ibm.com/harddrive
drive@us.ibm.com

IBM hard disk drive product information and technical support center:
United States:   1-888-IBM-5214 (1-888-426-5214)
Other countries: 507-253-4110

IBM TECHFAX:  1-408-256-5418 (requires a touch-tone phone)
International customers must call from a fax machine.

TECHFAX #7108

¹ Clear cover drive models shown for illustration purposes only.

² Up to 94 KB used for firmware.

* IBM is a registered trademark and Adaptive Battery Life Extender, Travelstar, and Drive Fitness Test are trademarks of International Business Machines Corporation. Other names are trademarks or registered trademarks of their respective owners.

Product description data represents design objectives and is provided for comparative purposes; actual results may vary depending on a variety of factors. Product claims are true as of the date of the first printing. This product data does not constitute a warranty. Questions regarding IBM warranty terms or the methodology used to derive this data should be referred to an IBM representative.

Data is subject to change without notice. IBM development plans are subject to change at any time without prior notice.

References in this publication to IBM products, programs, or services do not imply that IBM intends to make them available in all countries in which IBM operates.

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