Seagate Enterprise Capacity 3.5 HDD v7 SAS Product Manual, Rev. C
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3.1
Standard features
Enterprise Capacity 3.5 HDD v7 drives have the following standard features:
• 128 - deep task set (queue)
• 256MB data buffer (see Section 4.4).
• 3.0 / 6.0/12.0 Gb Serial Attached SCSI (SAS) interface
• Drive Self Test (DST)
• Embedded servo design
• Firmware downloadable using the SAS interface
• Flawed logical block reallocation at format time
• Idle Read After Write (IRAW)
• Industry standard SFF 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 Balance supported (Section 6.2 on page 26)
• Power Save
• Programmable auto write and read reallocation
• Programmable logical block reallocation scheme
• Reallocation of defects on command (Post Format)
• SAS Power Disable
• 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
• T10 Fast Format supported (see Section 4.1.2)
• User-selectable logical block sizes for 4096 native models (4096, 4160 or 4224 bytes per logical block)
• User-selectable logical block sizes for 512E (512, 520, 524 or 528 bytes per logical block).
• Vertical, horizontal, or top down mounting
Seagate Enterprise Capacity 3.5 HDD v7 SAS Self-Encrypting Drive models have the following additional features:
• 32 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 glass substrate coated with a thin film magnetic material, overcoated with a proprietary protective layer for
improved durability and environmental protection.
3.3
Performance
• 1200MB/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)
.
3.4
Reliability
• 5-year warranty
• Annualized Failure Rate (AFR) of 0.35%
• Balanced low mass rotary voice coil actuator
• Incorporates industry-standard Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)
• Mean time between failures (MTBF) of 2,500,000 hours
Note
There is no significant performance difference between Self-Encrypting
Drive and standard (non-Self-Encrypting Drive) models.
