Seagate 100516226 Computer Drive User Manual


 
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F 6
3.1 STANDARD FEATURES
Cheetah 15K.7 drives have the following standard features:
1.5 / 3 / 6 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, 520, or 528 bytes per logical block)
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
Vertical, horizontal, or top down mounting
Dynamic spindle brake
16 Mbyte data buffer
Drive Self Test
Background Media Scan
Power Save
Cheetah 15K.7 SAS SED models have the following additional features:
Automatic data encryption/decryption on all writes and reads to and from the media
Controlled access
Random number generator
Drive locking
Two independent data bands which each have it’s own ownership credential and encryption key
Cryptographic erase of user data for a drive that will be repurposed or scrapped
Authenticated firmware download
3.2 MEDIA 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.
3.3 PERFORMANCE
Programable multi-segmented cache buffer
600 Mbytes/sec maximum instantaneous data transfers
15k RPM spindle. Average latency = 2.0 msec
Background processing of queue
Supports start and stop commands (spindle stops spinning)
Adaptive seek velocity; improved seek performance
Note. There is no significant performance difference between Self-Encrypting Drive and standard (non-Self-Encrypting
Drive models.