Seagate ST973402SS, ST9146802SS manual Standard features, Media description, Performance

3.1Standard features

Savvio drives have the following standard features:

•Perpendicular recording technology

•1.5 / 3 Gbit Serial Attached SCSI (SAS) interface

•Integrated dual port SAS controller supporting the SCSI protocol

•Support for SAS expanders and fanout adapters

•Firmware downloadable using the SAS interface

•128 - deep task set (queue)

•Supports up to 32 initiators

•Jumperless configuration.

•User-selectable logical block size (512 to 528 bytes per logical block) in any multiple of 4 bytes.

•Industry standard SFF 2.5-inch dimensions

•Programmable logical block reallocation scheme

•Flawed logical block reallocation at format time

•Programmable auto write and read reallocation

•Reallocation of defects on command (Post Format)

•ECC maximum burst correction length of 320 bits

•No preventive maintenance or adjustments required

•Dedicated head landing zone

•Embedded servo design

•Automatic shipping lock

•Self diagnostics performed when power is applied to the drive

•Zone bit recording (ZBR)

•Vertical, horizontal, or top down mounting

•Dynamic spindle brake

•16 Mbyte data buffer (see Section 4.5).

•Drive Self Test (DST)

•Background Media Scan (BGMS)

•Idle Read After Write (IRAW)

•Power Save

3.2Media description

The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection.

3.3Performance

•Programmable multi-segmentable cache buffer

•300 Mbytes/sec maximum instantaneous data transfers.

•10k RPM spindle. Average latency = 3.0 msec

•Background processing of queue

•Supports start and stop commands (spindle stops spinning)

•Adaptive seek velocity; improved seek performance

8 Savvio 10K.2 SAS Product Manual, Rev. B