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Seagate Constellation ST91000642SS. HDD capacity: 1 TB, HDD speed: 7200 RPM, Storage drive buffer size: 64 MB, HDD size: 2.5", Interface: SAS

Ideal for NAS, SAN and DAS external enterprise storage solutions, this fourth-generation Savvio 10K.4 drive provides the highest capacity and best reliability available in a small form factor, 10K-RPM enterprise hard drive. This drive enables 3.5-inch to 2.5-inch form factor transition and widespread market adoption of 2.5-inch-based external storage solutions for enterprise OEMs, system designers and end-user organisations.- The world's highest-capacity SFF drive (up to 600 GB);- The industry's first 2M-hour MTBF drive to provide 0.44 per cent AFR - 20 percent higher reliability than any other drive available;- Second-generation 6-Gb/s SAS with dual-port communication and first SFF hard drive with 4-Gb/s FC support;- SFF and low power consumption reduce end-user cooling and energy costs;- PowerChoice™ feature for T10-compliant power management empowers IT organisations to tailor systems for performance and power consumption;- Protection Information (PI) option detects corruption of data in flight between the host system and the drive;- Head ramp load/unload feature for improved device handling reliability;- TCG-compliant, Self-Encrypting Drive (SED) security option (SAS models only) eliminates the need to overwrite or physically destroy drives, enables safe return of drives for warranty or expired lease purposes, and allows organisations to repurpose or sell hard drives securely;- This drive enables OEMs and system designers to design external storage solutions for organisations with green IT strategies, data-at-rest concerns, and power- or space-constrained IT environments.

- 10,000-RPM spindle speed- Extremely fast access to data- Ultra320 SCSI Interface- Differential data integrity; up to 320-Mbyte/sec transfer rate; Cables 15 devices, up to 12 meters- 8-Mbyte cache buffer- Improved performance

The Cheetah 10K.7 lowers cost of ownership with the industry'shighest reliability, designed for full duty cycle applications; Seagate-exclusive Background Media Scan; enhanced Error Correction Code; and low power and cooling requirements. Capacities include 300, 146 and 73 Gbytes, with Ultra320 SCSI or 2 Gbit/sec Fibre Channel interfaces.

The Cheetah 15K.5 is mainstream enterprise disc drive storage. It is the best price/performance, lowest cost of ownership, 3.5-inch disc drive, with the industry's highest 3.5" disc drive reliability.Features:15K RPM spindle speedDelivers more I/O's per second and faster sustained transfer rates than 10K 3.5-inch drvies, enabling the same high performance to be met with fewer drives.Background Media Scan (BMS)Second generation Seagate-exclusive BMS proactively scans the media for potential defects during drive idle time. It enables incipient errors to be corrected before data is lost.Perpendicular RecordingPerpendicular recording is fundamentally superior, enabling the highest areal density with 30 percent higher performance.Nonrecoverable Error RateThe nonrecoverable error rate has been improved by a factor of 10.Idle Read After Write (IRAW)Seagate-exclusive IRAW enhances data protection by verifying-during drive idle time-that data in the drive buffer was properly written.

Pushing the Boundaries of System Design—SmallerIn our ultra-portable world, we need more storage in smaller and smaller-sized solutions. By offering up to 500GB in a 30% slimmer laptop HDD design, Seagate enables a new path to higher capacity for an ever-smaller footprint.Compatible Laptop Interface and Applications100% compatible with today’s laptop standards, the Laptop Ultrathin HDD features a SATA 6Gb/s connector. With 100MB/s sustained data transfer rate, the Laptop Ultrathin HDD provides easy design integration supported by the performance demanded for laptop applications and other slim storage devices.Seamless Data SecurityAs our data becomes more portable it also becomes more vulnerable. Personal finances, social security numbers, business plans could all be compromised. Protect these assets with the Laptop Ultrathin SED option, which uses TCG Opal encryption standards for real time data encryption and enables easy drive retirement with Seagate Instant Secure Erase (ISE).