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190017497754
HP P37664-K21 18TB 7200RPM SAS 12Gb/s 3.5-Inch Internal Hard Drive
190017497754

HP P37664-K21 18TB 7200RPM SAS 12Gb/s 3.5-Inch Internal Hard Drive

Best price now

$698.00at Advanced Data DevicesChecked 51 min ago

92% under what the other stores charge

Compared across 6 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $698.00 at Advanced Data Devices (checked Nov 11, 2026).
  • Checked at 6 stores.

Our take on the HP P37664-K21 18TB 7200RPM SAS 12Gb/s 3.5-Inch Internal Hard Drive

This is HPE's 18TB midline SAS hard drive, a 7200 RPM helium-filled 3.5-inch drive built for servers and storage arrays rather than desktops. It ships in an HPE Smart Carrier, so it slots straight into ProLiant Gen10 and Gen11 bays, and the self-encrypting (SED/ISE) model adds hardware encryption for compliance-minded deployments. Against 2.5-inch 10K SAS drives it trades spindle speed for far more capacity and lower power per terabyte; against SATA drives it adds dual-port SAS 12Gb/s and better queueing for multi-drive arrays. It is a capacity-tier drive, not a performance one, and buyers should treat it as part of a RAID set with backups, since 18TB rebuilds are slow and failure during rebuild is the real risk.

Best forProLiant and Apollo servers needing HPE-certified capacityRAID arrays for backup, archive and media storageVirtualization and file servers where density beats IOPSDeployments requiring self-encrypting drives
Pros
  • 18TB per drive in a standard 3.5-inch LFF bay
  • SAS 12Gb/s dual-port interface for redundant paths
  • Helium-filled design keeps power and heat down for its capacity
  • Self-encrypting (ISE/SED) for data-at-rest protection
  • Ships in an HPE Smart Carrier, ready for hot-swap bays
  • HPE firmware and warranty support for supported servers
Cons
  • 7200 RPM spindle means modest random IOPS; not for heavy transactional workloads
  • Midline rating, not enterprise 24/7 mission-critical class
  • 18TB rebuilds take many hours and stress the array
  • Requires a SAS controller; will not plug into plain SATA desktop ports
  • HPE-certified drives carry a premium over generic SAS drives

HP P37664-K21 18TB 7200RPM SAS 12Gb/s 3.5-Inch Internal Hard Drive prices at every store

  • Advanced Data DevicesNew

    In stock

    $698.00Checked 51 min ago
    Visit Advanced Data Devices
  • GotodirectNew

    In stock

    $969.46Checked 51 min ago
    Visit Gotodirect
  • BarcodesIncNew

    In stock

    $12,860.48Checked 51 min ago
    Visit BarcodesInc
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $719.00Free shippingChecked 51 min ago
    Visit Amazon
  • CompSourceNew

    Availability unknown

    $8,433.00Checked 51 min ago
    Visit CompSource
  • PCNationNew

    Availability unknown

    $8,525.69Checked 51 min ago
    Visit PCNation

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HP P37664-K21 18TB 7200RPM SAS 12Gb/s 3.5-Inch Internal Hard Drive price history

Lowest price we've seen: $698.00 on Nov 11 at Advanced Data Devices. Tracked across 5 stores since Nov 11.

What reviewers say

Owner feedback on HPE midline 18TB SAS drives centers on steady operation in ProLiant arrays and easy carrier-based installation. Complaints tend to be about cost per drive and the long rebuild times that come with this capacity.

What people mention
  • CompatibilityPraisedOwners report the Smart Carrier version fits ProLiant Gen10 and Gen11 bays directly.
  • ReliabilityPraisedLong-running arrays are described as stable with few unexpected failures.
  • Noise and heatPraisedHelium filling keeps it cooler and quieter than older high-capacity air drives.
  • Rebuild timeCriticisedAt 18TB, rebuilding a failed array member takes many hours and worries owners.
  • ValueCriticisedBuyers say HPE-branded drives cost noticeably more than equivalent generic SAS drives.
  • PerformanceMixedSequential throughput is fine, but random IOPS is limited by the 7200 RPM spindle.

About the HP P37664-K21 18TB 7200RPM SAS 12Gb/s 3.5-Inch Internal Hard Drive

This is an HPE 18TB internal hard drive in the 3.5-inch large form factor (LFF). It uses a SAS 12Gb/s interface and spins at 7,200 RPM. It is a Midline Business Critical drive and is helium-filled.

The drive is installed in an HPE Smart Carrier. The part numbers are P37664-K21 and P37664-B21.

Capacity
18TB
Interface
SAS 12Gb/s
Speed
7,200 RPM
Form factor
3.5-inch LFF
Drive class
Midline Business Critical
Technology
Helium
Carrier
HPE Smart Carrier
Part numbers
P37664-K21, P37664-B21

Questions and answers

Will this drive work in my ProLiant server?
It is designed for HPE ProLiant Gen10 and Gen11 LFF bays and ships in a Smart Carrier. Older generations and non-HPE servers may need a different carrier or may not accept HPE firmware drives.
Is this drive self-encrypting?
Yes. This is the ISE/SED variant, so it supports hardware encryption when paired with a compatible HPE Smart Array controller and key management.
Can I use it in a desktop PC?
Only with a SAS host bus adapter or RAID controller. Standard desktop SATA ports cannot connect a SAS drive.
Is it good for a NAS?
It works in a SAS-capable NAS or storage enclosure, but it is a midline drive. For always-on NAS use, compare against enterprise-class drives rated for heavier duty cycles.
What is the difference between the B21 and K21 part numbers?
Both are the same 18TB 7200 RPM SAS drive; the suffix denotes the carrier or packaging configuration. Confirm the carrier type matches your server or enclosure before ordering.
Should I buy one drive or several?
For any important data, plan a RAID set with redundancy and keep backups. A single 18TB drive has no protection against failure.
Where is the HP P37664-K21 18TB 7200RPM SAS 12Gb/s 3.5-Inch Internal Hard Drive cheapest?
At Advanced Data Devices, for $698.00, 92% under what the other stores charge, as of our latest check.
Where can I buy the HP P37664-K21 18TB 7200RPM SAS 12Gb/s 3.5-Inch Internal Hard Drive?
6 stores we checked sell it, including Gotodirect, Advanced Data Devices, Amazon, CompSource, PCNation.