Western Digital Purple Surveillance Hard Drive SATA - 2TB - WD23PURZ-85C5HY0

• Manufacturer: Western Digital
• Model: WD23PURZ — WD Purple Surveillance
• Capacity: 2 TB · Form Factor: 3.5 inch · Interface: SATA 6 Gb/s
• Built for 24×7 recording — not a desktop drive repurposed for a DVR
• Workload Rating: Up to 180 TB/year — around three times that of a desktop drive
• AllFrame™ technology: Reduces dropped video frames and improves playback
• Supports up to 64 single-stream HD cameras · up to 8 drive bays
• MTBF: Up to 1 million hours · Warranty: 3-year limited

Western Digital Purple WD23PURZ is a 2 TB 3.5-inch hard drive built for surveillance recorders — engineered for the continuous write workload a DVR or NVR generates, which is a fundamentally different job from what a desktop drive is designed to do.

The number that captures it is the 180 TB/year workload rating — around three times that of a desktop drive. Workload rating is how much data the manufacturer expects the drive to write in a year, and surveillance is relentless: a recorder writes continuously, every hour, forever. A desktop drive is built on the assumption it will be switched off overnight and idle for much of the day. Put one in a DVR and it operates far outside its design envelope, which is why recorder drives fail early — and why the recorder usually gets blamed instead of the drive.

AllFrame™ technology is WD's specific contribution here. It improves ATA streaming to reduce dropped video frames under the write-intensive, low-bit-rate, high-stream-count pattern that surveillance produces. A dropped frame is not an inconvenience on a security system — it is the missing second in the footage you are trying to review.

The drive supports up to 64 single-stream HD cameras and systems of up to eight drive bays, and is engineered to cope with the heat fluctuation and equipment vibration inside a recorder enclosure. MTBF is rated up to 1 million hours, with a 3-year limited warranty.

Technical Specifications

Recommended Applications

1) Why can't I just use a normal desktop hard drive in my DVR?

Because it is built for a different job and will usually fail early. This drive carries a 180 TB/year workload rating — roughly three times a desktop drive — and is engineered for the heat and vibration inside a running recorder. A desktop drive assumes it gets switched off overnight and idles much of the day. In a DVR writing continuously it runs far outside its design, and when it dies the recorder usually gets the blame.

2) What does AllFrame technology actually do?

It improves ATA streaming to reduce dropped video frames under the write-intensive, high-stream-count pattern surveillance creates. On a security system a dropped frame is not a cosmetic issue — it is the missing second in the footage you are trying to review.

3) How many drive bays does it support?

Up to eight. Western Digital's own footnote specifies that 1 TB to 2 TB drives support up to eight bays, while 3 TB and above support up to sixteen. Some listings quote sixteen bays for this model, which is incorrect — if you are speccing a larger recorder, choose 3 TB or above.

4) How many days of footage will 2 TB hold?

It depends on camera count, resolution and frame rate — four 1080p cameras store far longer than sixteen 4K ones. Most DVR and NVR interfaces will estimate recording days for a given disk size based on your actual setup, and that figure is far more reliable than any general guide.

1. Return within 24 hours of delivery for:
   • Damaged or defective product
   • Wrong or missing item
2. Product cannot be returned once installed or used
3. Refer to Refund Policy for complete details

Hard drives are sensitive to shock — please check the packaging for transit damage on delivery, before installing.