Exact-model 8TB BarraCuda guide
Seagate BarraCuda 8TB: ST8000DM004 Price, SMR and Storage Guide
ST8000DM004 offers inexpensive 8TB desktop capacity, but it remains a 5,400 RPM SMR drive with a 55TB-per-year workload rate. Its value is strongest for mostly-read media and archive storage. Buyers planning heavy rewrites, Unraid parity, RAID rebuilds or an always-on NAS should compare CMR alternatives before ordering.
Quick answer
Buy ST8000DM004 for low-cost bulk desktop storage when reads dominate and long write slowdowns are acceptable. Choose WD Blue WD80EAAZ for a current desktop CMR option, IronWolf for NAS duty, or BarraCuda 12TB when a larger current CMR model provides better value per terabyte.
Exact model data
BarraCuda 8TB and CMR alternatives
| Capacity | Model | Family | Recording | RPM | Cache | Max sustained | Workload | Warranty |
|---|---|---|---|---|---|---|---|---|
| 8TB | ST8000DM004 | BarraCuda | SMR | 5,400 | 256MB | 190MB/s | 55TB/yr | 2 years |
| 12TB | ST12000DM003 | BarraCuda | CMR | 7,200 | 512MB | 190MB/s | 120TB/yr | 2 years |
| 8TB | ST8000VN002 | IronWolf | CMR | 5,400 | 256MB | 202MB/s | 180TB/yr | 3 years |
| 8TB | WD80EAAZ | WD Blue | CMR | 5,640 | 256MB | 215MB/s | Not listed | 2 years |
The 12TB BarraCuda row shows the current family's transition to CMR. Compare total price and bay value rather than assuming 8TB is automatically the cheapest usable option.
Live catalogue
Current new BarraCuda 8TB offers
Verified exact-model listing identity remains eligible for at least 336 hours after successful confirmation. Current new-condition price and Amazon image observations refresh independently. A missing featured offer or temporary catalogue request failure does not remove a still-verified listing. Exact family, capacity and current-model matching are enforced.
Interactive decision tool
Check whether BarraCuda 8TB fits the workload
Estimate sustained writes, fullness and parity use. The result explains whether the low-cost SMR design is comfortable or a CMR alternative is safer.
ST8000DM004 specification and intended duty
ST8000DM004 is listed as an 8TB 5,400 RPM SMR drive with 256MB cache and up to 190MB/s maximum sustained outer-diameter read speed. It has a 55TB-per-year workload rate, 2,400 power-on hours per year and a two-year limited warranty.
These are desktop-family specifications. They do not prohibit every home-server use, but they should be compared with the expected annual writes, powered-on time and recovery behavior.
Why 8TB can look like the value sweet spot
Eight terabytes often has a competitive sticker price and can hold a large media library or backup set. It can reduce the number of drives compared with 4TB models and may fit in desktop cases with limited bays.
Price per terabyte can change quickly. Compare the current 12TB CMR BarraCuda and 8TB CMR WD Blue. A larger drive can be cheaper per terabyte or preserve a bay, making the nominally cheaper 8TB option less attractive.
Large SMR capacity magnifies long-write decisions
An 8TB drive can receive multi-terabyte transfers, parity calculations or rebuild-like workloads. Those jobs are exactly where device-managed SMR may show long slow periods after its staging areas fill. Near-full operation can reduce the room available for internal data movement.
For an archive written once and read often, this can be acceptable. For a drive repeatedly rewritten at scale, CMR is easier to plan around. The suitability tool uses session size, frequency, fullness and array use to make that distinction.
Plex and media-server use
A Plex library is primarily read during playback, so ST8000DM004 can serve a single-drive media server. The server's CPU, GPU and network usually determine transcoding and playback limits. Keep the Plex database, metadata and transcode directory on SSD when possible.
Library imports, downloads and replacement of large media sets create writes. A modest home server can tolerate them, but a multi-user NAS or array should move toward IronWolf or another CMR product.
Backup strategy for an 8TB drive
A large backup disk can tempt users to place all copies on one device. Do not confuse capacity with protection. Keep another independent copy and verify restoration. Initial backups and full re-seeding may take many hours, especially when source and destination are HDDs.
Incremental backups that change a small portion of the disk can fit the workload better than constant full rewrites. Monitor job duration and SMART health over time.
Unraid, parity and multi-drive arrays
Unraid and parity arrays can involve long writes during parity build, checks and recovery. An SMR data disk may function, but rebuild and sustained-write behavior can be less predictable. A parity disk that is slower under rewriting can affect the whole operation.
Use documented CMR drives for a new array when budget allows. IronWolf is the Seagate family designed for NAS duty. A current WD Blue 8TB CMR model may be considered for desktop-like systems, but compatibility and workload still matter.
BarraCuda 8TB versus 12TB CMR
ST12000DM003 is CMR, 7,200 RPM, 512MB cache and rated for 120TB per year. It costs more in absolute terms, but the additional 50% capacity and different recording method can make it a better long-term buy.
Compare price per terabyte and the value of avoiding an extra drive bay. If the 12TB premium is less than 50%, it already has the lower raw price per terabyte. The CMR advantage can justify more even when raw price is close.
The 8TB buying checklist
Confirm ST8000DM004, new condition and a valid warranty route. Reject external-drive listings, enclosures, renewed disks and family-mixed product pages. Compare WD80EAAZ, ST8000VN002 or ST8000VN004 and ST12000DM003 according to workload.
Buy ST8000DM004 when low-cost, mostly-read capacity is the objective. Do not buy it by accident for a workload that explicitly requires CMR.
How Cloudzat evaluates BarraCuda drives
Cloudzat attaches recording technology, RPM, cache, transfer rate, workload and warranty only to an exact current model. It never assumes that every BarraCuda at the same capacity is identical. This is essential at 2TB, where ST2000DM005 and ST2000DM008 have different rotational speed, transfer and power specifications, and across the family boundary where current 1TB through 8TB models use SMR while 12TB through 24TB models use CMR.
Live offers are screened for current desktop BarraCuda models, new condition, plausible capacity and price. Obvious SSDs, 2.5-inch laptop drives, external drives, NAS appliances, enclosures, accessories, SAS products, multipacks, renewed, recertified and used listings are rejected. Price per terabyte uses the current single-drive price divided by decimal capacity. Every important file still needs an independent backup.
Frequently asked questions
Seagate BarraCuda questions
Is ST8000DM004 SMR?
Is BarraCuda 8TB good for Plex?
Can ST8000DM004 be used in Unraid?
What is the current WD Blue 8TB alternative?
Is BarraCuda 12TB CMR?
How much power does ST8000DM004 use?
Primary sources
- Seagate BarraCuda 3.5-inch HDD data sheet, March 2026
- Seagate BarraCuda SATA product manual for 12TB through 24TB, February 2026
- Seagate warranty and replacement support
Cloudzat may earn a commission from qualifying purchases. Product availability, pricing and specifications can change. Confirm the exact BarraCuda model, recording technology, seller, condition and regional warranty route before buying.