ST4000NM025B — Seagate 4TB 7200RPM SAS 12Gb/s 3.5-in Hard Drive
MPN: ST4000NM025B|By: Seagate

Starting from
$420
Indicative — final pricing confirmed with your quote.
In Stockships worldwide
- Condition:
- New — authorized channel
- Warranty:
- Full manufacturer warranty
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Bulk order? Request volume pricing
Product overview
Seagate lists ST4000NM025B as a 4TB 7200RPM SAS 12Gb/s 3.5-in hard Drive. Replacing a failed drive means matching interface, form factor and firmware to the backplane it is going into. This is a SAS unit. Send us the server model and we will confirm the fit rather than leave you to check it.
Ask for the datasheet and firmware notes with the quote; we would rather you check our claim than take it.
Featuring
- Capacity
- 4TB
- Manufacturer
- Seagate
Interfaces / Ports
- Rotational Speed
- 7200RPM
- Drive Interface
- SAS
- Interface Standard
- 12Gb/s
Physical characteristics
- Product Type
- Server Hard Drives
- Expedited shipping options are available — rates confirmed with your quote.
- Purchase orders accepted from qualified institutions.
- Compatibility is validated against your server platform before dispatch. Send us the model and we will confirm support.
Specifications for ST4000NM025B as published by Seagate. Where a value is absent it is because we could not verify it, not because it does not exist — ask and we will check.
Where the Seagate ST4000NM025B is deployed
- Swapping out a failed server hard drive for ST4000NM025B under change control
- Rebuilding a parity group after a drive failure
- Holding a firmware-matched cold spare per chassis family
Who this part is for
- Backup and archive teams growing bulk capacity in an existing shelf
- Procurement replacing drives out of a maintenance contract
- Teams standardising a mixed drive estate onto one firmware family
What you get ordering this from us
Ordered by part number
The order is placed against ST4000NM025B, not against a description of it, so there is no room for a substitution you did not agree to.
No substitutions without asking
If we cannot supply the exact code we tell you what we can supply and why, rather than shipping an equivalent and letting you find out.
Spares held to a fleet standard
Tell us the chassis you run and we will keep the spare consistent with what is already in the shelf.
Questions buyers ask about this part
- Is ST4000NM025B genuine and is the warranty intact?
- Yes. Supplied new and unopened, so the manufacturer warranty and firmware update path stay supported. No grey-market stock and no refurbished units sold as new.
- Will ST4000NM025B work in my server?
- Send the server model or the shelf it is going into. Vendor-keyed firmware is the usual reason an identical-looking drive is rejected, so we check that alongside interface and form factor.
- Do you accept purchase orders and quote at volume?
- Yes. Purchase orders are accepted from qualified organisations, net terms are available on approval, and tiered pricing applies at quantity. Tell us how many you need.
Compare other Server Hard Drives we stock
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Specifying a system, not just the part?
Bulk capacity usually sits behind the flash tier that feeds a training cluster rather than under it.
