ST4000NM0035 Seagate Exos 7E8 4TB SATA: 0035 vs 0023 vs 0033
The ST4000NM0035 is a Seagate Exos 7E8 4TB SATA enterprise drive, and it is the drive people reach for when a 4TB nearline array needs a member. This covers what it is, how it differs from the drives with similar numbers, and what to check before buying.
What is the Seagate ST4000NM0035?
A 3.5 inch, 4TB, SATA 6Gb/s enterprise nearline drive from the Exos 7E8 family. 7200 RPM class, conventional magnetic recording, 512n sector format, air filled, built for continuous operation in capacity tiers.
The 512n format is worth noting. Many 4TB enterprise drives of this era are 512n, which makes them straightforward on older platforms that struggle with 512e or 4Kn. Our sector format guide covers why that matters.
ST4000NM0035 vs ST4000NM0023 vs ST4000NM0033
Three Seagate 4TB enterprise drives with similar numbers and different interfaces.
ST4000NM0035 — Exos 7E8, SATA, 512n.
ST4000NM0023 — Constellation ES.3, SAS, an earlier generation. Our ST4000NM0023 guide covers it.
ST4000NM0033 — Constellation ES.3, SATA, earlier generation.
The trap: a listing showing "Seagate 4TB enterprise" could be any of these. The 0035 is the newer SATA drive; the 0023 is SAS and will not work on a SATA controller. Confirm the exact number on the label. Our part numbers guide covers reading it.
Is the ST4000NM0035 CMR?
Yes. Exos enterprise nearline drives use conventional recording and are suitable for RAID, NAS and array workloads. Our SMR vs CMR guide covers why that needs confirming.
Where does the ST4000NM0035 fit?
Three situations.
Replacing or expanding a 4TB nearline array. Match interface, sector format and class.
Older platforms that need 512n. Some older controllers and hypervisors do not handle 512e well. A 512n drive removes that question.
Small NAS units and backup targets where 4TB per bay is enough. Our drive class guide covers enterprise drives in NAS units.
Where it does not: new capacity builds, where 8TB and above deliver better cost per terabyte. Our 16TB Exos guide covers the value sweet spot.
What to check before buying
Four things.
SATA controller, or a SAS controller that accepts SATA drives.
Sector format matches the array. If the array is 512e, do not mix in a 512n drive.
Firmware coding. Behind a Smart Array or PERC, a bare Seagate may be flagged; the vendor-coded 4TB equivalent is safer. Our OEM guide covers this.
Carrier, generation-matched for hot-swap. Our caddies guide covers this.
Frequently asked questions
Is the ST4000NM0035 SATA or SAS?
SATA 6Gb/s. The similarly numbered ST4000NM0023 is SAS. Confirm the exact part number on the label.
Is the ST4000NM0035 CMR or SMR?
CMR. Suitable for RAID, NAS and array workloads.
What sector format is the ST4000NM0035?
512n. That makes it straightforward on older platforms that struggle with 512e or 4Kn, but it should not be mixed into a 512e array.
Is the Exos 7E8 good for a NAS?
Yes if on the vendor compatibility list. It is SATA, CMR and rated for continuous operation. Enterprise drives run hotter and louder than NAS-class drives, which matters in an office.
Should I buy 4TB drives for a new build?
Usually not. Larger capacities deliver better cost per terabyte. 4TB makes sense for replacing or expanding an existing 4TB array, or for older platforms that need 512n.
Will it work in an HPE or Dell server?
Behind an HBA, yes. Behind a Smart Array or PERC that validates firmware, a bare Seagate may be flagged; the vendor-coded equivalent is safer. It needs the correct carrier either way.
Seagate Exos 7E8
ST4000NM0035 4TB SATA 512n Enterprise Hard Drive
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