ST1000LM035 Seagate 1TB Laptop Drive: Why Not in a Server
The ST1000LM035 is a Seagate BarraCuda 1TB 2.5 inch laptop drive, and it appears in server searches because 2.5 inch drives fit server bays physically. Physical fit is not compatibility. This covers why.
What is the Seagate ST1000LM035?
A 2.5 inch, 7mm, 1TB, SATA 6Gb/s laptop hard drive from the BarraCuda mobile family. 5400 RPM class, shingled magnetic recording (SMR), designed for notebooks and thin systems.
The full part number includes a revision suffix such as -1RK172. Revisions differ in firmware and internal configuration. Our part numbers guide covers reading suffixes.
Will a laptop drive fit a server bay?
Physically, sometimes. Usefully, no.
Three separate problems.
Height. Server 2.5 inch bays are designed for 15mm drives; laptop drives are 7mm or 9.5mm. A 7mm drive in a 15mm carrier may not seat properly against the backplane connector, and carriers are built for the taller drive.
It is SMR. Random writes collapse and RAID rebuilds can fail. Our SMR vs CMR guide covers the mechanism.
It is mobile class. Workload rating is for intermittent laptop use, not continuous operation. Error recovery behaviour is desktop-style, which causes RAID controllers to drop the drive as failed. Our drive class guide covers this.
Server 2.5 inch drives are a different product: 15mm, SAS or enterprise SATA, CMR, rated for continuous operation. Our 2.5 inch enterprise drive guide covers one example.
Where the ST1000LM035 is fine
Laptop and notebook upgrades or replacements, its intended role.
Thin external USB enclosures, where 7mm height is required.
Bulk storage in a small form factor system with backup elsewhere.
It is not a bad drive; it is a drive for portable systems.
What to use in a server 2.5 inch bay instead
Enterprise 2.5 inch SAS or SATA drives at 15mm, CMR, vendor-coded where the controller validates firmware. Our HPE 900GB SAS guide covers a typical example.
Enterprise SSDs, which are 2.5 inch 7mm or 15mm and designed for server bays. For small capacities in a server, an SSD is almost always the better answer than a 1TB mechanical drive. Our PM883 guide covers one.
And in either case, the carrier must match your chassis generation. Our caddies guide covers this.
Frequently asked questions
Can I use a laptop hard drive in a server?
Not usefully. Height differs (7mm laptop versus 15mm server bays), it is SMR so rebuilds can fail, and mobile-class workload rating and error recovery are wrong for an array.
Is the ST1000LM035 SMR?
Yes. Shingled magnetic recording, which is common on high-capacity 2.5 inch laptop drives.
What is the difference between a 7mm and 15mm drive?
Height. Laptop drives are 7mm or 9.5mm; server 2.5 inch bays and carriers are built for 15mm. A thinner drive may not seat properly against the backplane connector.
What does the -1RK172 suffix mean?
It identifies the exact revision, which differs in firmware and internal configuration. For a laptop replacement it rarely matters.
What should I put in a server 2.5 inch bay?
An enterprise 2.5 inch SAS or SATA drive at 15mm, CMR, with the correct generation carrier. For small capacities, an enterprise SSD is almost always the better answer.
Is the ST1000LM035 a bad drive?
No. It is a laptop drive doing a laptop job. It is the wrong product for a server, not a bad product.
If you need 2.5 inch storage for a server, tell us the chassis and we will quote the right height, class and carrier together.
