Seagate IronWolf8 TB · 3.5-inch · SATA · 7200 RPM · CMR · ST8000VN004- Capacity
- 8000 GBThis one: 12000 GB
- Limited warranty time
- 3 yearsThis one: 5 years
STORAGE
Seagate IronWolf Pro
12 TB · 3.5-inch · SATA · 7200 RPM · CMR · Seagate part ST12000NT001
- Capacity
- 12000 GB
- SSD / HDD
- HDD
- Form factor
- 3.5-inch
Seagate's 12 TB IronWolf Pro NAS hard drive (ST12000NT001): a helium-filled 7200 RPM CMR drive with a 550 TB/year workload rating and a five-year limited warranty. Seagate's data sheet and its product manual give different cache (256 MB vs 512 MB) and maximum sustained transfer figures (270 MB/s vs 272/285 MB/s) for this model.
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THE ACTUAL PRODUCT
Compare with Seagate IronWolf
Specifications checked 26 Sept 2026Manufacturer specifications, not a hands-on test.
The nearest checked drives by key specifications, with what differs from the Seagate IronWolf Pro. The first matches the Compare button above.
Seagate IronWolf8 TB · 3.5-inch · SATA · 7200 RPM · CMR · ST8000VN004
Toshiba N3008 TB · EMEA retail kit · HDWG780EZSTA- Capacity
- 8000 GBThis one: 12000 GB
- Limited warranty time
- 3 yearsThis one: 5 years
Toshiba X3008 TB · EMEA retail kit · HDWR780EZSTA- Capacity
- 8000 GBThis one: 12000 GB
- Limited warranty time
- 2 yearsThis one: 5 years
Key strengths
Seagate rates it for 550 TB/year and 2.5 million hours MTBF, with a five-year limited warranty and three years of Rescue Data Recovery Services where offered.
Specified without a drive-bay limit, with AgileArray dual-plane balancing, time-limited error recovery and rotational-vibration sensors for RAID performance in multi-bay systems.
At 12 TB the helium design's rated power is below the air-filled 8 TB and 10 TB IronWolf Pro parts' 10.1 W operating and 7.8 W idle, although Seagate's documents give different 12 TB figures: 7.8 W operating and 5.0 W idle in the data sheet, 8.3–8.98 W typical operating and 6.19 W idle in the product manual.
Before you buy
Seagate's documents disagree on the maximum sustained transfer rate (data sheet 270 MB/s at the outer diameter; product manual 272 MB/s in its specification summary table and 285 MB/s in its recording and interface technology table); neither gives seek-time or IOPS figures (the manual lists only a 4.16 ms average latency).
Non-operating shock is 200 G (data sheet: 1 ms and 2 ms; product manual: 2 ms), below the air-filled 8 TB IronWolf Pro's 300 G on the data sheet; for operating shock the data sheet gives 50/50 G (read/write, 2 ms) and the product manual 40 g (2 ms).
Every specification. With its source.
Full specifications
Exact configuration: 12 TB · 3.5-inch · SATA · 7200 RPM · CMR · ST12000NT001
29 specifications in 6 groups. Values are manufacturer specifications unless a row says “Measured result” or “Calculated from cited specifications”. 1 row repeats a listed fact in the manufacturer’s own wording, kept under “Manufacturer wording”.
Capacity & format
10 items
- Capacity
- 12000 GB
12 TB decimal capacity (Seagate: one terabyte equals one trillion bytes). Some capacity is used for formatting and other functions.
- SSD / HDD
- HDD
3.5-inch helium-filled hard disk drive with conventional magnetic recording (CMR) per Seagate.
Source - Form factor
- 3.5-inch
- Interface and version
- SATA 6 Gb/s
- Interface speeds supported
- 6.0, 3.0 and 1.5 Gb/s SATASource
- Drive dimensions
- 26.11 mm high × 101.85 mm wide × 146.99 mm deep (1.028 in × 4.01 in × 5.787 in)
Seagate lists height, maximum width and maximum depth. Seagate data sheet DS2129.4 second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001).
- Cache
- Conflicting sources
Seagate's official documents conflict for ST12000NT001: data sheet DS2129.4-2311US gives a 256 MB cache; product manual 206815300 Rev B gives a 512 MB cache buffer. Neither document states which figure applies to current ST12000NT001 production. · Data sheet: 'Cache (MB)' 256MB for ST12000NT001. Seagate data sheet DS2129.4-2311US second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001). Product manual: Table 2 'Cache buffer' 512MB, a single value spanning all four model columns including ST12000NT001; its key-features list also says '512MB data buffer' and '512MB cache buffer'. Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page.
2 sources
- Seagate IronWolf Pro 3.5 HDD data sheet DS2129.4-2311US (per-model specification table)
- Seagate IronWolf Pro SATA Product Manual 206815300 Rev B, July 2025 (models ST24000NT002, ST20000NT001, ST16000NT001, ST12000NT001) — linked as 'Download User Manual' from the ST12000NT001 entry on the official US product page
- Recording technology
- CMR (conventional magnetic recording)Source
- Sector size
- 512E (512-byte emulation)Source
- Weight
- Conflicting sources
Seagate's official documents conflict for ST12000NT001 weight: data sheet DS2129.4-2311US and the US product page give 670 g / 1.477 lb (typical); product manual 206815300 Rev B gives 655 g / 1.44 lb for the 12TB model (Table 20; Table 2 labels its weight row as maximum). Neither document states which figure applies to current ST12000NT001 production. · Data sheet: 'Weight (g/lb, typical)' 670g/1.477lb for ST12000NT001; the US product page ST12000NT001 key specifications also list 670g/1.477lb. Seagate data sheet DS2129.4-2311US second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001). Product manual: Table 20 'Weight' gives 12TB 1.44/655 (lb/g); Table 2 'Weight (max)' lists 685g (1.51 lb), 670g (1.48 lb) and 655g (1.44 lb) across the model columns. Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page. Units as published; not converted.
3 sources
- Seagate IronWolf Pro 12TB (ST12000NT001) — official US product page
- Seagate IronWolf Pro 3.5 HDD data sheet DS2129.4-2311US (per-model specification table)
- Seagate IronWolf Pro SATA Product Manual 206815300 Rev B, July 2025 (models ST24000NT002, ST20000NT001, ST16000NT001, ST12000NT001) — linked as 'Download User Manual' from the ST12000NT001 entry on the official US product page
Performance
2 items
- Max sustained transfer rate (OD)
- Conflicting sources
Seagate's official documents conflict for ST12000NT001's maximum sustained transfer rate: data sheet DS2129.4-2311US gives 270 MB/s (outer diameter); product manual 206815300 Rev B gives 272 MB/s (max sustained, outer diameter, Table 2) and 285 MB/s (sustained data transfer rate, max, Table 4). Neither document states which figure applies to current ST12000NT001 production. · Data sheet: 'Max. Sustained Transfer Rate OD (MB/s)' 270MB/s for ST12000NT001. Seagate data sheet DS2129.4-2311US second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001). Product manual: Table 2 'Max sustained transfer rate OD (MB/s)' 272 and 'Sustained transfer rate OD (MB/s)' 259 (single values spanning all four models); Table 4 'Sustained data transfer rate (MB/s max)' 285 for 24/20/16/12TB. Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page. Seagate states actual data rates may vary depending on operating environment and other factors.
2 sources
- Seagate IronWolf Pro 3.5 HDD data sheet DS2129.4-2311US (per-model specification table)
- Seagate IronWolf Pro SATA Product Manual 206815300 Rev B, July 2025 (models ST24000NT002, ST20000NT001, ST16000NT001, ST12000NT001) — linked as 'Download User Manual' from the ST12000NT001 entry on the official US product page
- Spindle speed
- 7200 RPM
Seagate data sheet DS2129.4 second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001).
Source
Manufacturer wording (1)
The same facts in the manufacturer’s combined or original wording, each with its source.
- Rated performance and conditions
- 7200 RPM
Only the spindle speed is recorded here: both Seagate documents give 7200 RPM. The data sheet and the product manual disagree on the maximum sustained transfer rate (data sheet 270MB/s at the outer diameter; manual 272 MB/s max sustained OD in Table 2 and 285 MB/s sustained max in Table 4) and on cache (data sheet 256MB; manual 512MB); those figures are recorded as explicit conflicts in the max_sustained_transfer and cache fields, not as a value here. Seagate data sheet DS2129.4-2311US second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001). Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page. Seagate states actual data rates may vary depending on operating environment and other factors. Not our measurement.
2 sources
- Seagate IronWolf Pro 3.5 HDD data sheet DS2129.4-2311US (per-model specification table)
- Seagate IronWolf Pro SATA Product Manual 206815300 Rev B, July 2025 (models ST24000NT002, ST20000NT001, ST16000NT001, ST12000NT001) — linked as 'Download User Manual' from the ST12000NT001 entry on the official US product page
Endurance & warranty
7 items
- Limited warranty time
- 5 yearsSource
- Warranty terms and endurance if applicable
- 5-year limited warranty; rated workload 550 TB/year; 3 years of Rescue Data Recovery Services included
Seagate states Rescue Data Recovery Services are not available in all countries. Workload rate limit is a rating, not a warranty write cap stated by Seagate.
- Workload rate limit
- 550 TB/year
Seagate workload rate limit (WRL); drives are specified for 8,760 power-on hours per year (24×7).
Source - Manufacturer application scope
- Commercial and enterprise NAS; video production RAID and shared network storage; workstations and servers
Seagate data sheet 'Best-Fit Applications' list (complete). The data sheet also describes IronWolf Pro as purpose-built for creative pro and medium-to-large business NAS environments.
Source - MTBF
- 2,500,000 hours
Seagate-rated mean time between failures, data sheet 'Mean Time Between Failures (MTBF, hours)' row. Seagate data sheet DS2129.4 second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001).
Source - Nonrecoverable read errors (max)
- 1 per 10E15 bits readSource
- Load/unload cycles
- 600,000
Product manual Table 2 'Load-unload cycles' (a single value for the 24/20/16/12TB models the manual covers) and section 2.9 '600,000 cycles'; the data sheet has no load/unload row. Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page.
Source
Power
2 items
- Power
- Conflicting sources
Seagate's official documents conflict for ST12000NT001 power: data sheet DS2129.4-2311US gives 7.8 W average operating, 5.0 W average idle and 1.0 W standby; product manual 206815300 Rev B gives 8.3–8.98 W typical operating depending on workload, 6.19 W average idle and 1.16 W standby. Both give a 2.0 A typical 12 V startup current. Neither document states which figure applies to current ST12000NT001 production. · Data sheet (ST12000NT001): average operating 7.8 W; idle average 5.0 W; standby typical 1.0 W; sleep typical 1.0 W; startup current 2.0 A typical (12 V). Seagate data sheet DS2129.4-2311US second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001). Product manual Table 6 'DC power requirements (24/20/16/12TB models)' (typical measurements based on an average of drives tested, under nominal conditions, using 5.0V and 12.0V input voltage at 35°C ambient): Avg Idle 6.19 W; Standby 1.16 W; typical DC operating 8.98 W (random read 4K16Q), 8.75 W (random write 4K16Q), 8.3 W (sequential read 64K16Q), 8.58 W (sequential write 64K16Q). Manual Table 2: startup current (typical) 12V (peak) 2.0A. Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page.
2 sources
- Seagate IronWolf Pro 3.5 HDD data sheet DS2129.4-2311US (per-model specification table)
- Seagate IronWolf Pro SATA Product Manual 206815300 Rev B, July 2025 (models ST24000NT002, ST20000NT001, ST16000NT001, ST12000NT001) — linked as 'Download User Manual' from the ST12000NT001 entry on the official US product page
- Power supply requirements
- +12 V and +5 V; tolerance including noise 5 V ± 5%, 12 V ± 10%
Data sheet 'Power Supply Requirements' row: +12 V and +5 V (no tolerance listed). Seagate data sheet DS2129.4-2311US second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001). Product manual Table 2: 'Voltage tolerance (including noise)' 5V ± 5% and 12V ± 10%, given as a single value for the 24/20/16/12TB models the manual covers; section 2.5.3 adds peak-to-peak noise limits. Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page.
2 sources
- Seagate IronWolf Pro 3.5 HDD data sheet DS2129.4-2311US (per-model specification table)
- Seagate IronWolf Pro SATA Product Manual 206815300 Rev B, July 2025 (models ST24000NT002, ST20000NT001, ST16000NT001, ST12000NT001) — linked as 'Download User Manual' from the ST12000NT001 entry on the official US product page
Features & software
1 item
- NAS features
- Drive bays supported: unlimited; AgileArray with dual-plane balancing and time-limited error recovery (TLER); rotational vibration (RV) sensors; IronWolf Health Management
Seagate says IronWolf Health Management is enabled on all leading NAS systems and to check with the NAS vendor or a Seagate sales representative. Seagate states IronWolf drives have been tested by leading NAS providers such as Asustor, QNAP and UGREEN for compatibility, and recommends reviewing the NAS vendor's compatibility list for the latest approved drive. The rotational vibration rating is recorded separately (vibration_rotational) because Seagate's data sheet and product manual state it with different frequency ranges and units.
Environment & reliability
7 items
- Operating temperature
- Conflicting sources
Seagate's official documents conflict for ST12000NT001: data sheet DS2129.4-2311US gives 0 °C ambient minimum to 65 °C drive-reported maximum; product manual 206815300 Rev B gives 5 °C to 65 °C drive-reported and a maximum allowable drive-reported temperature of 60 °C. Neither document states which figure applies to current ST12000NT001 production. · Data sheet: 'Operating Temperature (ambient, min °C)' 0°C and 'Operating Temperature (drive reported, max °C)' 65°C for ST12000NT001. Seagate data sheet DS2129.4-2311US second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001). Product manual: Table 2 'Operating temperature 5°C to 65°C (Drive Reported Temperature)'; Table 11 '41°F to 149°F (5°C to 65°C) temperature range ... as reported by the drive' and 'The maximum allowable drive reported temperature is 140°F (60°C).' Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page.
2 sources
- Seagate IronWolf Pro 3.5 HDD data sheet DS2129.4-2311US (per-model specification table)
- Seagate IronWolf Pro SATA Product Manual 206815300 Rev B, July 2025 (models ST24000NT002, ST20000NT001, ST16000NT001, ST12000NT001) — linked as 'Download User Manual' from the ST12000NT001 entry on the official US product page
- Non-operating temperature
- -40 °C to 70 °C (ambient)Source
- Operating shock rating
- Conflicting sources
Seagate's official documents conflict for ST12000NT001: data sheet DS2129.4-2311US gives 50/50 G (read/write, 2 ms) operating shock; product manual 206815300 Rev B gives 40 g (2 ms, typical, limited by Z-axis). Neither document states which figure applies to current ST12000NT001 production. · Data sheet: 'Shock, Operating 2ms (Read/Write) (Gs)' 50/50Gs for ST12000NT001. Seagate data sheet DS2129.4-2311US second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001). Product manual: Table 2 'Operational Shock (2 ms) 40 g' (all four models); Table 14 'intermittent shock pulses not exceeding 40 g typical at a 2ms duration limited by Z-axis'. Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page.
2 sources
- Seagate IronWolf Pro 3.5 HDD data sheet DS2129.4-2311US (per-model specification table)
- Seagate IronWolf Pro SATA Product Manual 206815300 Rev B, July 2025 (models ST24000NT002, ST20000NT001, ST16000NT001, ST12000NT001) — linked as 'Download User Manual' from the ST12000NT001 entry on the official US product page
- Non-operating shock rating
- 200 G; 1 ms and 2 ms
Seagate 'Shock, Nonoperating, 1ms and 2ms (Gs)' row. Seagate data sheet DS2129.4 second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001).
Source - Non-operating vibration rating
- Conflicting sources
Seagate's official documents agree on 2.27 Grms but conflict on the frequency range for ST12000NT001: data sheet DS2129.4-2311US gives 10–500 Hz; product manual 206815300 Rev B gives 2–500 Hz. Neither document states which figure applies to current ST12000NT001 production. · Data sheet: 'Vibration, Nonoperating: 10Hz to 500Hz (Grms)' 2.27 for ST12000NT001. Seagate data sheet DS2129.4-2311US second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001). Product manual: Table 2 'Linear Random Non-Operating Vibration 2–500 Hz: 2.27 Grms'; Table 17 'PSD Profile 2-500 Hz at 2.27 Grms'. Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page.
2 sources
- Seagate IronWolf Pro 3.5 HDD data sheet DS2129.4-2311US (per-model specification table)
- Seagate IronWolf Pro SATA Product Manual 206815300 Rev B, July 2025 (models ST24000NT002, ST20000NT001, ST16000NT001, ST12000NT001) — linked as 'Download User Manual' from the ST12000NT001 entry on the official US product page
- Rotational vibration rating (operating)
- Conflicting sources
Seagate's official documents both give 12.5 but conflict on frequency range and unit for ST12000NT001: data sheet DS2129.4-2311US gives 12.5 rad/s at 10–1500 Hz; product manual 206815300 Rev B gives 12.5 rad/s² at 20–1500 Hz (random rotary operating vibration). Neither document states which figure applies to current ST12000NT001 production. · Data sheet: 'Rotational Vibration @ 10-1500 Hz (rad/s)' 12.5 for ST12000NT001. Seagate data sheet DS2129.4-2311US second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001). Product manual: Table 2 'Random Rotary Operating Vibration 20–1500Hz: 12.5 rads/s²'; Table 16 'PSD OF 20-1500 Hz at 12.5 rad/sec^2'. Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page. Units as published; not converted.
2 sources
- Seagate IronWolf Pro 3.5 HDD data sheet DS2129.4-2311US (per-model specification table)
- Seagate IronWolf Pro SATA Product Manual 206815300 Rev B, July 2025 (models ST24000NT002, ST20000NT001, ST16000NT001, ST12000NT001) — linked as 'Download User Manual' from the ST12000NT001 entry on the official US product page
- Acoustics
- Conflicting sources
Seagate's official documents conflict for ST12000NT001 acoustics: data sheet DS2129.4-2311US gives 20 dBA idle and 26 dBA seek (typical); product manual 206815300 Rev B gives A-weighted sound power of 2.8 bels idle and 3.2 bels performance seek (typical). Neither document states which figure applies to current ST12000NT001 production. · Data sheet: 'Acoustics, Idle (typical, measured in Idle 1 state) (dBA)' 20 and 'Acoustics, Seek (typical) (dBA)' 26 for ST12000NT001. Seagate data sheet DS2129.4-2311US second table; ST12000NT001 is the second model column (14TB ST14000NT001, 12TB ST12000NT001, 10TB ST10000NT001, 8TB ST8000NT001, 6TB ST6000NT001). Product manual: Table 2 'Drive acoustics, sound power (bels)' idle 2.8 (typical) / 3.0 (max) and performance seek 3.2 (typical) / 3.4 (max); Table 18 gives the same for all models; section 2.7 says these are overall A-weighted acoustic sound power levels consistent with ISO 7779. Seagate IronWolf Pro SATA Product Manual 206815300 Rev B (July 2025), which covers ST24000NT002, ST20000NT001, ST16000NT001 and ST12000NT001 and is linked as 'Download User Manual' from the ST12000NT001 entry on the US product page. Each figure is kept in the unit Seagate states (dBA and bels); not converted.
2 sources
- Seagate IronWolf Pro 3.5 HDD data sheet DS2129.4-2311US (per-model specification table)
- Seagate IronWolf Pro SATA Product Manual 206815300 Rev B, July 2025 (models ST24000NT002, ST20000NT001, ST16000NT001, ST12000NT001) — linked as 'Download User Manual' from the ST12000NT001 entry on the official US product page
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