HGST Ultrastar HUS723030ALS640 3TB 7200RPM SAS 6Gbps 3.5" 64MB Cache Enterprise Internal Bare or OEM Hard Disk Drives

📊 Key Specifications

Capacity: 3 TB

Interface: SAS 6 Gb/s (Serial Attached SCSI)

Spindle Speed: 7,200 RPM — balance of capacity and performance

Form Factor: 3.5″ (Large Form Factor, LFF)

Cache: 64 MB

Sector Format: 512e (512 B emulation)

Series: Ultrastar 7K3000 (enterprise series)

🧠 What This Drive Is

The HGST Ultrastar HUS723030ALS640 is an enterprise‑grade internal hard disk designed for servers, storage arrays, and data center applications:

SAS interface: Designed for reliable server connectivity

7.2K RPM performance: Faster than typical desktop 7.2K drives due to SAS and enterprise firmware

64 MB cache: Helps with sustained reads/writes in heavy workloads

Built to run 24/7 with high reliability and longevity .

This drive is often supplied as bare/OEM and used in RAID arrays, bulk storage, virtualization hosts, and archival tiers in enterprise environments.

⚙️ Compatibility

✔ Works with servers and storage systems that support:

SAS controllers (e.g., Dell PERC, HPE Smart Array, etc.)

SAS backplanes on PowerEdge, ProLiant, ThinkServer, and many other enterprise platforms

⚠️ SAS drives like this require a SAS controller/backplane — they won’t work on ordinary desktop SATA ports without a proper SAS adapter.

🏎️ Performance & Use

While spinning disks are slower than SSDs, this model strikes a good balance for:

Bulk data storage

RAID arrays (RAID 5, 6, 10)

Large‑capacity server storage tiers

Workloads not requiring ultra‑high IOPS but benefiting from SAS reliability

Compared to other mechanical drives:

Faster than many desktop SATA drives due to SAS and enterprise design

Higher sustained throughput than smaller enterprise drives

Lower random I/O than SSDs but better suited for sequential workloads

👍 Pros

Enterprise‑grade reliability for 24/7 operation

Good capacity at 3 TB per drive

SAS interface optimized for servers and HBAs

Compatible with a wide range of enterprise systems

👎 Cons

Slower than SSDs — not suited for high IOPS workloads

Refurbished or used units are common (check SMART health)

Mechanical components mean more power/heat/noise vs SSDs