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818214511065
Seagate ST1800MM0139 Enterprise Performance 10K 1.8TB 10000RPM SAS 12Gb/s 256MB Cache 16GB NAND SSD (SED / 512e) 2.5-Inch Internal Hybrid Hard Drive
818214511065

Seagate ST1800MM0139 Enterprise Performance 10K 1.8TB 10000RPM SAS 12Gb/s 256MB Cache 16GB NAND SSD (SED / 512e) 2.5-Inch Internal Hybrid Hard Drive

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$539.41at GotodirectChecked Nov 11

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Price facts

  • Last seen at $539.41 at Gotodirect on Nov 11.

Our take on the Seagate ST1800MM0139 Enterprise Performance 10K 1.8TB 10000RPM SAS 12Gb/s 256MB Cache 16GB NAND SSD (SED / 512e) 2.5-Inch Internal Hybrid Hard Drive

The Seagate ST1800MM0139 is a 2.5-inch enterprise hybrid drive: a 10,000 RPM spinning disk with a 16GB NAND flash cache, a 256MB DRAM cache and a SAS 12Gb/s interface. It is built for servers and storage arrays that need fast random reads and steady throughput, not for a desktop PC. The flash cache absorbs hot read data, so it beats a plain 10K SAS drive on repeated-access workloads, while a 15K drive still wins on raw seek time and a SATA SSD wins on latency. It is a legacy-tier part now that all-flash arrays dominate; buy it to keep an existing SAS enclosure running, not as a new-performance choice.

Best forReplacing failed drives in existing SAS 2.5-inch server baysRead-heavy database and caching tiers on a SAS backplaneKeeping older enterprise arrays in serviceBuyers who need a self-encrypting drive with 512e sectors
Pros
  • 10,000 RPM spindle with 16GB NAND cache speeds repeat reads
  • SAS 12Gb/s dual-port interface for redundant server paths
  • 256MB cache is large for a 10K 2.5-inch drive
  • Self-encrypting (SED) with 512e sector format
  • 1.8TB capacity in a 2.5-inch enterprise form factor
Cons
  • Hard disk latency; far slower than any SSD on random I/O
  • Runs hotter and uses more power than an SSD
  • Needs a SAS controller; not a SATA drop-in
  • 10K SAS is an end-of-life tier, so firmware and supply are limited
  • No hardware encryption key management without a supported controller

Seagate ST1800MM0139 Enterprise Performance 10K 1.8TB 10000RPM SAS 12Gb/s 256MB Cache 16GB NAND SSD (SED / 512e) 2.5-Inch Internal Hybrid Hard Drive prices at every store

  • GotodirectNew

    In stock

    $539.41Checked Nov 11
    Visit Gotodirect

Store links may earn us a commission.

About the Seagate ST1800MM0139 Enterprise Performance 10K 1.8TB 10000RPM SAS 12Gb/s 256MB Cache 16GB NAND SSD (SED / 512e) 2.5-Inch Internal Hybrid Hard Drive

This is the Seagate Enterprise Performance 10K internal hybrid hard drive, model ST1800MM0139. It has a 1.8TB capacity and a 2.5-inch form factor.

The drive spins at 10,000 RPM and connects through a SAS 12Gb/s interface. It has a 256MB cache and 16GB of NAND flash. It is a self-encrypting drive (SED) with 512e sector format.

Brand
Seagate
Model
ST1800MM0139
Series
Enterprise Performance 10K
Capacity
1.8TB
Rotation speed
10,000 RPM
Interface
SAS 12Gb/s
Cache
256MB
NAND flash
16GB
Form factor
2.5-inch internal
Drive type
Hybrid hard drive
Security
Self-encrypting drive (SED)
Sector format
512e

Questions and answers

Is this a hard drive or an SSD?
It is a hard drive with a 16GB NAND flash cache. The spinning 10,000 RPM platters store the data; the flash holds hot read data to cut access times.
Will it work in a normal desktop PC?
No. It uses a SAS 12Gb/s interface, which needs a SAS host bus adapter or server backplane. A SATA-only motherboard will not recognize it.
What does SED and 512e mean?
SED means the drive supports self-encryption, which needs a compatible controller to manage keys. 512e means it reports 512-byte logical sectors over 4K physical sectors, which most modern systems handle.
How does it compare with a 15K SAS drive?
The 15K drive has lower rotational latency and faster seeks. This drive's 16GB flash cache and larger capacity favor it for read-heavy, capacity-hungry workloads.
Should I buy this or a SATA SSD?
A SATA SSD is far faster on random I/O and uses less power. Choose this only if you need SAS dual-port redundancy, the 1.8TB capacity in a 2.5-inch bay, or a drop-in replacement for an existing array.
Where is the Seagate ST1800MM0139 Enterprise Performance 10K 1.8TB 10000RPM SAS 12Gb/s 256MB Cache 16GB NAND SSD (SED / 512e) 2.5-Inch Internal Hybrid Hard Drive cheapest?
At Gotodirect, for $539.41, as of our latest check.

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