Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc. Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc.
Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc. Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc.
Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc. Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc.
Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc. Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc.
Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc.
Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc.
Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc.
Seagate Cheetah 15K.5 (ST3300655LC) 300GB, 15000RPM, 16MB Cache SCSI Ultra320 80pin 3.5" Hard Drive - Anand International Inc.

Anand International Inc.

Seagate Cheetah 15K.5 ST3300655LC, 300 GB, 15000 RPM, 3.5" Internal Hard Drive

$249.99
Tax included.

The Seagate Cheetah® 15K.5 ST3300655LC is a brand-new 300GB, 80-pin Ultra320 SCSI hard drive spinning at 15,000 RPM, engineered for mainstream enterprise storage with industry-leading reliability and performance. Featuring perpendicular recording technology, it delivers up to 125 MB/s sustained transfer rates—30% higher throughput and IOPS with over 20% faster response times compared to 10K drives—while reducing infrastructure, space, and maintenance needs. Designed for demanding 24x7 applications, the Cheetah 15K.5 offers the highest reliability of any 3.5-inch drive, a tenfold improvement in nonrecoverable error rates, and faster RAID rebuilds with minimized risk. Ideal for email, business and transaction processing, decision support, e-commerce, SAN, and NAS environments, this enterprise-class drive provides unmatched speed, efficiency, and long-term durability.
Specifications

Model Number: ST3300655LC

Capacity

• Formatted 512 Kbytes/Sector (GB): 300
• External Transfer Rate (MB/s)
• Ultra320 SCSI: 320
• 4-Gb/s Fibre Channel: 400
• 3-Gb/s Serial Attached SCSI: 300

Performance

• Spindle Speed (RPM): 15K
• Average Latency (ms): 2.0

Seek Time
• Average Read/Write (ms): 3.5/4.0
• Track-to-Track Read/Write (ms): 0.2/0.4

Transfer Rate
• Internal (Mb/s): 960 to 1607
• Internal Formatted (MB/s): 89 to 150
• Sustained (MB/s): 73 to 125
• Cache, Multisegmented (MB/s): 16

Configuration/Organization

• Discs: 4
• Heads: 8
• Nonrecoverable Read Errors per Bits Read: 1 sector per 10E16
• Annualized Failure Rate (AFR): 0.62%

Power Management

• Typical (W) SCSI: 17.6
• Typical (W) Fibre Channel: 18.8
• Typical (W) SAS: 17.4
• Power Idle (W) SCSI: 12.5
• Power Idle (W) Fibre Channel: 13.7
• Power Idle (W) SAS: 13.2

Environmental

• Temperature, Operating (°C): 5 to 55
• Temperature, Nonoperating (°C): –40 to 70
• Shock, Operating: 2 ms (Gs): 60
• Shock, Nonoperating: 2 ms (Gs): 250
• Acoustics Idle (bels—sound power): 3.6
• Vibration, Operating: <400 Hz (Gs): 1.0
• Vibration, Nonoperating: <400 Hz (Gs): 2.0

Physical

• Height (in/mm): 1.0/25.4
• Width (in/mm): 4.0/101.6
• Depth (in/mm): 5.75/146.05
• Weight (lb/kg): 1.5/0.771
Product Features
Key Advantages
  • Perpendicular recording is fundamentally superior, enabling 300-GB capacity with 30 percent higher sustained data rate.
  • The Seagate® Cheetah® 15K.5 drive is the first drive to break the 100-MB sustained transfer rate barrier, delivering up to 125 MB/s.
  • Fastest and most reliable Cheetah 15K drive ever
  • 30 percent more IOPS and more than 20 percent faster response times than 3.5-inch 10K drives
  • Enables higher performance with fewer drives, reducing supporting infrastructure, maintenance and space needs, while increasing system reliability
  • Highest reliability of any 3.5-inch drive in the industry, designed for demanding 24x7enterprise applications
  • Reduces RAID rebuild times while minimizing reliability risks
  • Nonrecoverable error rate has been improved by a factor of 10.
Compatibility

The 80-pin version of these low-profile 1" SCSI hard drives are compatible with any computer/server capable of accepting 3.5" initernal drives.

They are also compatible with any of our SCSI controllers.
Shipping & Returns
  • Free Shipping: We currently offer free Economy Shipping within the continental U.S. with no minimum order required. Expedited shipping is available at standard carrier rates.
  • Same-Day Shipping: Order placed before 2PM PST will ship the same day. Orders received after this time will ship the following business day.
  • Hassle-Free Returns: If you're not completely satisfied with your purchase, simply return it within 10 days for a hassle-free refund or exchange.

Product Overview and Benefit

Cheetah® 15K.5 - Mainstream Enterprise Hard Drive Storage

Best Price/Performance, Lowest Cost of Ownership Disc Drive

The new Cheetah 15K.5 enterprise disc drive employs innovative perpendicular recording technology to set new standards for storage cost effectiveness. While doubling available capacity to 300GB, the Cheetah 15K.5 also delivers 36 percent higher sequential performance. This enables enterprises to meet their throughput and capacity requirements with fewer drives, significantly reducing total cost of ownership (TCO). Seagate® designed the Cheetah 15K.5 for maximum reliability in demanding enterprise applications, including a nonrecoverable error rate that’s been improved by a factor of 10. Cheetah 15K.5 incorporates such Seagate-exclusive features as IRAW (Idle Read After Write), enhanced ECC (Error Correction Code) and BMS (Background Media Scan) to safeguard data integrity in the most rigorous environments.

Lowest Cost of Ownership

  • Fifth-generation Cheetah 15K drive is the fastest, highest capacity and most reliable ever.
  • Cheetah 15K.5 drive performance and reliability enable lower TCO for enterprise applications.
  • 15K RPM and fast seek times deliver the fastest time -to-data, resulting in 30 percent more IOPS and over 20 percent faster response times than 3.5-inch 10K drives.
  • Higher performance with fewer drives—reducing support infrastructure, physical space requirements and storage management costs.
  • The highest reliability of any 3.5-inch drive, and increased system reliability due to the need for fewer drives

Highest Reliability

  • Seagate continues to focus on reliability and data protection. New features in this generation have improved the nonrecoverable error rate by a factor of 10.
  • Seagate-exclusive IRAW (Idle Read After Write) enhances data protection by verifying—during drive idle time—that data in the drive buffer was properly written.
  • Seagate-exclusive enhanced Error Correction Code better maintains performance throughout the life of the drive and reduces the probability of lost data.
  • The second generation of Seagate-exclusive Background Media Scan (BMS) proactively scans the media for potential defects during drive idle time. It enables incipient errors to be corrected before data is lost.
  • The Cheetah 15K.5 drive is designed and manufactured by the same teams that successfully delivered the past four award-winning generations.

Seagate Service Centers—Worldwide Support

  • Presales and technical support at 1-800-SEAGATE
  • Expert email support and complete historical web content available online
  • Experienced support staff
  • Seagate Design Service Centers (DSC) help companies transform innovative ideas into viable products.

Best-Fit Applications

All mainstream enterprise applications, such as:

  • Email
  • Business processing
  • Transaction processing
  • Decision support
  • Storage area networks (SAN)
  • Networked attached storage (NAS)
  • Internet and e-commerce

Helpful Resources

Find success stories, datasheets, and references to help you achieve your goals.

Seagate Cheetah 15K.5 Datasheet
Seagate Cheetach 15K.5 Product Manual
Seagate Cheetah 15K.5 Product Overview
Best price/performance, lowest cost of ownership disc drive.

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Frequently Asked Questions

Frequently asked questions for Serial-Attached SCSI, including information on usage, configuration, and compatibility.

1. What is the difference between Serial Attached SCSI and Parallel SCSI?

Serial Attached SCSI (SAS) is an evolutionary development of parallel SCSI, a proven technology which has been the foundation of enterprise storage for over two decades. SAS leverages the rock-solid reliability of parallel SCSI while offering dramatic improvements in performance, scalability and compatibility.
2. Are parallel interfaces faster than serial interfaces?

In the past, parallel interfaces were preferable because their multiple data paths enabled greater throughput than the single data path of serial interfaces. However, recent advancements in VLSI technology have enabled serial transfer rates to make a huge leap forward, without the complex timing issues that hinder further parallel interface development. Compared to parallel SCSI, Serial Attached SCSI features higher throughput now and greater potential for advancement in the future.
3. Does this mean parallel SCSI is now obsolete?

Not necessarily. Parallel SCSI has long played a key role in enterprise data storage, and will continue to have a presence. That said, Serial Attached SCSI is a compelling complement that matches the superb reliability and robustness of its acclaimed predecessor, while significantly expanding the SCSI envelope in terms of speed, scalability and flexibility.
4. Will the migration path from parallel SCSI to SAS be difficult?

Ease of migration was a primary consideration when Seagate and other industry figures collaborated to define Serial Attached SCSI standards. SAS was specifically engineered to leverage existing SCSI command sets, preserving your investment in storage management and enterprise application software. And unlike ATA solutions, no system-level workarounds are required to deploy SAS drives.
5. What is the difference between Serial Attached SCSI and Serial ATA?

Serial Attached SCSI is an enterprise-class solution that goes beyond its interface to deliver the superior performance, reliability and scalability demanded in mission-critical applications. Serial ATA is primarily a desktop-class solution suitable for use in light-duty environments where low cost is the highest priority.
6. Are SAS and Serial ATA compatible?

Yes, compatibility with Serial ATA is indeed a core feature of Serial Attached SCSI. SAS backplanes and Host Bus Adapters (HBA) are fully compatible with Serial ATA, enabling connectivity for both types of drives on a common backplane, lowering infrastructure costs. SAS enclosures offer tremendous flexibility for growing businesses who can deploy Serial ATA drives when storage requirements are modest, then seamlessly add SAS drives as evolving business needs dictate. This guarantees the freedom to specify the optimal drive for the application: SAS for transactional and online performance and reliability, Serial ATA for nearline and backup and restore duties.
7. What is a Serial Attached SCSI expander?

Expanders are the key to Serial Attached SCSI's remarkable scalability. Each of these low-cost switches enables up to 128 point-to-point connections to be made from a single HBA/enclosure, and a total of 16,384 SAS devices can be aggregated while preserving performance and reliability. By contrast, parallel SCSI imposes a limit of fifteen devices per SCSI chain and severely limits total cable length.