The Seagate BarraCuda 8TB (ST8000DM004) uses SMR recording.
Verified against: Seagate BarraCuda 3.5in data sheet DS2131 ยท Checked
One of the models at the centre of the 2020 undisclosed-SMR episode, when shingled recording was shipping in consumer lines without being stated on the specification sheets.
Shingled recording overlaps tracks like roof tiles to raise density. Reading is unaffected, and for sequential work, archives, media libraries, backup targets, files written once and read many times, this drive is genuinely fine and the saving is real. The problem is sustained random writing, because modifying data under an existing track can force the tracks above it to be rewritten too. A RAID rebuild or a ZFS resilver is hours of exactly that pattern with no idle time to recover, so a 8TB ST8000DM004 in an array can extend a rebuild dramatically, and the rebuild window is precisely when the array has no redundancy left. Do not put this drive in a NAS or a parity array.
| Model number | ST8000DM004 |
| Brand | Seagate |
| Family | BarraCuda |
| Capacity | 8TB |
| Form factor | 3.5" |
| Rotational speed | 5400 RPM |
| Cache | 256 MB |
| Recording technology | SMR |
| Workload rate | 55 TB/year |
| Warranty | 2 years |
| Status | Current |
| Replaced by | โ |
A dash means the manufacturer does not state that field for this exact model. We leave it blank rather than filling it from a retailer listing.
If this drive is going into an array, a NAS, or anything that rebuilds, shingled recording is the wrong choice at any price. These are conventionally-recorded drives at this capacity or one step up, in stock right now with live prices.
| Drive | Capacity | Recording | $/TB | Price | |
|---|---|---|---|---|---|
| M40TH 8TB SAS 12G 512E | 8TB | CMR | $25.63 | $205 | Buy |
| Ultrastar 8TB SAS | 8TB | CMR | $27.50 | $220 | Buy |
| 834031-B21 8TB SAS LFF | 8TB | CMR | $32.75 | $262 | Buy |
Verified CMR model numbers at this size: ST8000VX004, ST8000VX010, ST8000VN004, ST8000VN002.
It is SMR. That comes from Seagate BarraCuda 3.5in data sheet DS2131, which is Seagate's own documentation for this exact part number rather than a capacity-level summary or a retailer listing.
We would not. Shingled recording turns a rebuild into hours of the write pattern it handles worst, which can extend the window during which your array has no redundancy. For sequential and archival use outside an array this drive is fine.
A conventionally-recorded drive at 8TB or one step up. The table above lists what is in stock right now with live prices, and every model number linked there has its own verified page with the manufacturer source.