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SEAGATE ENTERPRISE CAPACITY 3.5 HDD V4 SAS PRODUCT MANUAL, REV. A 8
3.1 STANDARD FEATURES
Enterprise Capacity 3.5 HDD v4 drives have the following standard features:
• Perpendicular recording technology
• 1.5 / 3.0 / 6.0/12.0 Gb 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 sizes for 5xxE (512, 520, 524 or 528 bytes per logical block).
• User-selectable logical block sizes for 4KN (4096, 4160, 4192 or 4224 bytes per logical block).
• Industry standard SFF 3.5-in 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)
• No preventive maintenance or adjustments required
• Embedded servo design
• Dedicated head load/unload zone
• Self diagnostics performed when power is applied to the drive
• Vertical, horizontal, or top down mounting
• 128 MB data buffer (see Section 4.4).
• Drive Self Test (DST)
• SAS Power Disable
• Power Save
• Seagate RAID Rebuild
TM
• Idle Read After Write (IRAW)
Seagate
®
Enterprise Capacity 3.5 HDD v4 SAS Self-Encrypting Drive models have the following additional features:
• Automatic data encryption/decryption
• Controlled access
• Random number generator
• Drive locking
• 16 independent data bands
• 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 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
• Programmable multi-segmentable cache buffer
• 1200MB/s maximum instantaneous data transfers.
• 7200 RPM spindle. Average latency = 4.16ms
• 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.