User Manual

Constellation ES.3 SAS Product Manual, Rev. F 12
3.1 Standard features
Constellation ES.3 drives have the following standard features:
• 1.5 / 3.0 / 6.0 Gb Serial Attached SCSI (SAS) interface
• 128 - deep task set (queue)
• 128 MB data buffer (see Section 4.4).
• Background Media Scan (BMS)
• Dedicated head load/unload zone
•Drive Self Test (DST)
• ECC maximum burst correction length of 400 bits
• Embedded servo design
• Firmware downloadable using the SAS interface
• Flawed logical block reallocation at format time
• Idle Read After Write (IRAW)
• Industry standard 3.5-in dimensions
• Integrated dual port SAS controller supporting the SCSI protocol
• Jumperless configuration.
• No preventive maintenance or adjustments required
• Perpendicular recording technology
•Power Save
• Programmable auto write and read reallocation
• Programmable logical block reallocation scheme
• Reallocation of defects on command (Post Format)
•Seagate RAID Rebuild
TM
• Self diagnostics performed when power is applied to the drive
• Support for SAS expanders and fanout adapters
• Supports up to 32 initiators
• User-selectable logical block size (512, 520 or 528 bytes per logical block).
• Vertical, horizontal, or top down mounting.
Constellation ES.3 SAS Self-Encrypting Drive models have the following additional features:
• 16 independent data bands
• Authenticated firmware download
• Automatic data encryption/decryption
• Controlled access
• Cryptographic erase of user data for a drive that will be repurposed or scrapped
•Drive locking
•Random number generator
3.2 Media description
The media used on the drive has a aluminum substrate coated with a thin film magnetic material, overcoated with a proprietary
protective layer for improved durability and environmental protection.
3.3 Performance
• 600MB/s maximum instantaneous data transfers.
• 7200 RPM spindle. Average latency = 4.16ms
• Adaptive seek velocity; improved seek performance
• Background processing of queue
• Programmable multi-segmentable cache buffer
• Supports start and stop commands (spindle stops spinning)
.
Note
There is no significant performance difference between Self-
Encrypting Drive and standard (non-Self-Encrypting Drive) models.