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SEAGATE ENTERPRISE PERFORMANCE 15K HDD AND ENTERPRISE TURBO SSHD SAS PRODUCT MANUAL, REV. B 6
3.0 General description
These drives provide high performance, high capacity data stora ge for a variety of systems including engineering workstations, network
servers, mainframes, and supercomputers. The Serial Attached SCSI interface is designed to meet next-generation computing deman ds
for performance, scalability, flexibility and high-density storage requirements.
The hybrid functionality of the 15K drive provides improved performance over standard HDDs in real-world workloads. This improvement is
due to the addition of a solid state component that caches "hot" data for reads as well as protects write data via non-volatile cache (NVC).
These drives are random access storage devices designed to support the Serial Attached SCSI Protocol as described in the ANSI
specifications, this document, and the SAS Interface Manual (part number 100293071) which describes the general interface
characteristics of this drive. These drives are classified as intelligent peripherals and provide level 2 conformance (highest level) with the
ANSI SCSI-1 standard. The SAS connectors, cables and electrical interface are compatible with Serial ATA (SATA), giving future users the
choice of populating their systems with either SAS or SATA hard disk drives. This allows integrators to continue to leverage existing
investment in SCSI while gaining a 6Gb/s serial data transfer rate.
The Self-Encrypting Drive models indicated on the cover of this product manual have provisions for “Security of Data at Rest” based on the
standards defined by the Trusted Computing Group (see www.trustedcomputinggroup.org).
The head and disk assembly (HDA) is sealed at the factory. Air recirculates within the HDA through a non-replaceable filter to maintain a
contamination-free HDA environment.
Note. Never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this
requires special facilities. The drive does not contain user-replaceable parts. Opening the HDA for any reason voids the
warranty.
Savvio drives use a dedicated landing zone at the innermost radius of the media to eliminate the possibility of destroying or degrading data
by landing in the data zone. The heads automatically go to the landing zone when power is removed from the drive.
An automatic shipping lock prevents potential damage to the heads and discs that results from movement during shipping and hand ling.
The shipping lock disengages and the head load process begins when power is applied to the drive.
These drives decode track 0 location data from the servo data embedded on each surface to eliminate mechanical transducer adjustments
and related reliability concerns.
The
drives also use a high-performance actuator assembly with a low-inertia, balanced, patented, straight arm design that provides
excellent performance with minimal power dissipation.