SkyHawk 4TB buying guide
Seagate SkyHawk 4TB is a common DVR and NVR upgrade, but the exact model determines whether the drive is a current CMR revision or older SMR stock. This page combines model verification with a practical retention calculator.
Quick answer
Buy ST4000VX015 or ST4000VX016 if you want a current 4TB CMR SkyHawk. Avoid treating older ST4000VX013 as equivalent because it is an SMR revision. Confirm your recorder supports a 4TB SATA surveillance drive, then use the retention calculator to check whether 4TB is actually enough.
Live Amazon prices
Live Seagate SkyHawk 4TB prices
Compare the exact model, capacity, recording technology, seller and current Amazon price before you buy.
SkyHawk +Rescue 4TB (ST4000VX016)
Seag 4TB ST4000VX016 5900 SA3 Skyhawk
Checked 15 days ago
Amazon prices and availability can change. Verify the final seller, condition and checkout total before ordering.
Decision tool
How many days will SkyHawk 4TB record?
Estimate retention using camera count, average bitrate, recording hours and motion activity.
Exact model data
SkyHawk 4TB exact models
| Capacity | Model | Family | Recording | RPM | Cache | Max sustained | Workload | Warranty |
|---|---|---|---|---|---|---|---|---|
| 4TB | ST4000VX015 | SkyHawk | CMR | 5,400 | 256MB | 180MB/s | 180TB/year | 3 years |
| 4TB | ST4000VX016 | SkyHawk +Rescue | CMR | 5,400 | 256MB | 180MB/s | 180TB/year | 3 years |
| 4TB | ST4000VX013 | SkyHawk legacy | SMR | 5,400 | 256MB | 180MB/s | 180TB/year | 3 years |
ST4000VX013 is shown for identification only. Current 4TB buying choices are the CMR revisions.
Buying guide
What to know before you buy
The current 4TB models are CMR
ST4000VX015 and ST4000VX016 are the current 4TB revisions listed in Seagate's product manual. Both are CMR surveillance drives with 5,400 RPM operation, 256MB cache and a 180TB-per-year workload tier.
ST4000VX016 is the +Rescue service-bundle model. Confirm regional coverage rather than assuming every seller provides the same service route.
Do not confuse ST4000VX013 with the current models
ST4000VX013 is an older 4TB SMR revision. It can still appear in search results and marketplace inventory under the same broad “SkyHawk 4TB” wording used for current models.
If you are buying a current 4TB drive, look for ST4000VX015 or ST4000VX016 and verify the exact model before checkout.
What 4TB retention actually means
Four terabytes can retain weeks or only days depending on camera count and bitrate. Eight cameras averaging 3Mbps continuously consume far more space than four cameras that record motion for a small part of each day.
Use measured average bitrates from the recorder when available. Resolution alone does not determine storage because codec settings, frame rate and scene complexity alter the bitrate.
Check the recorder's maximum capacity
Older DVRs may have a 2TB or 4TB addressing limit, while newer units can accept much larger drives. The SATA connector can fit even when the firmware cannot initialize the full capacity.
Update recorder firmware only according to the manufacturer's procedure and check the compatibility list before replacing a working drive.
A 4TB drive can be right for small systems
A 4TB SkyHawk often fits home and small-business recorders with a modest number of cameras and a retention target measured in weeks rather than months. It can also be a sensible replacement when the recorder itself has a 4TB ceiling.
Avoid buying 4TB merely because it is familiar. Calculate the footage requirement and allow growth for additional cameras.
Recording gaps are not always a drive-speed problem
Power supplies, SATA cables, recorder firmware, overheating and file-system corruption can produce HDD errors or missing footage. A recognized drive with zero available space does not automatically prove the drive is defective.
Back up important footage, review recorder logs and test the drive safely before replacing it.
Compare total recorder cost, not only drive price
A cheap legacy or unverified 4TB listing can cost more if it lacks the expected warranty, arrives as recertified stock or forces an early replacement. Compare price per terabyte only among exact new models with the same service terms.
When two current models are close in price, the +Rescue service may be worth considering for installations where recovery has operational value.
When to move from 4TB to 8TB
Move to 8TB when the recorder supports it and 4TB cannot deliver the required retention with reasonable headroom. A larger single drive can preserve bays for future expansion, but may increase replacement cost and rebuild exposure in multi-drive systems.
Use the 8TB page to compare standard SkyHawk with the entry-level SkyHawk AI option.
Before you buy a SkyHawk drive
- Match the exact model number and capacity to your recorder's supported-drive list.
- Confirm whether the model is standard SkyHawk, SkyHawk AI or an older revision.
- Check the seller, condition and regional warranty route before checkout.
- Size the drive for the retention period you actually need, with room for future camera growth.
Frequently asked questions
SkyHawk 4TB questions
Is ST4000VX016 CMR?
Is ST4000VX013 SMR?
How long will 4TB record eight cameras?
Will SkyHawk 4TB work in Hikvision or Dahua?
Should I choose ST4000VX015 or ST4000VX016?
Can I use SkyHawk 4TB in a desktop PC?
Sources
- Seagate SkyHawk current product manual
- Seagate SkyHawk archived data sheet with older revisions
- Seagate SkyHawk product page and current specifications
Cloudzat may earn a commission from qualifying purchases. Product availability, pricing and specifications can change. Confirm the exact model, recorder compatibility, seller, condition and regional warranty route before buying.