872487-B21 is the HPE option part number for 4TB SAS 12G Midline 7.2K LFF (3.5in) SC Digitally Signed Firmware HDD. It is a 3.5-inch large form factor hot-swap drive with a 12 Gb/s Serial Attached SCSI 3 interface, 7,200 rpm spindle speed and 512-byte sectors, supplied on an HPE Smart Carrier for tool-free installation into an LFF drive bay. The drive belongs to the HPE Business Critical line and carries digitally signed firmware. Supported platforms include ProLiant DL and ML Gen8, Gen9 and Gen10 servers such as DL360 Gen10, DL380 Gen10, DL380 Gen9, ML350 Gen9 and Apollo SL4540 Gen8 systems with 3.5-inch bays.
HPE Option Part #: 872487-B21
HPE Spare Part #: 872745-001
HPE Model #: MB004000JWFVH, MB004000JWFVP, MB004000JWKGU, MB004000JWWQB, MB004000JWZVU, MB004000JYDPB, MB4000JVYZQ
HPE Assembly Part #: 872493-003
PRODUCT SPECIFICATIONS FOR 872487-B21:
- Brand: HPE
- Product Line: HPE Business Critical
- Bytes per Sector: 512
- Data Transfer Rate (Hard Drive): 12 Gb/s
- Form Factor (Short): 3.5
- Form Factor (Short) (metric): 8.9 cm
- Hard Drive Capacity: 4 TB
- Hard Drive Type: Hot-swap hard drive
- HD Interface: Serial Attached SCSI 3
- Spindle Speed (rpm): 7200 revolutions per minute
- Storage Interface: Serial Attached SCSI 3
- Interface Provided: 1 x SAS 12 Gb/s
- Compatible Bay: 3.5" LFF
- Hard Drive Form Factor: 3.5" LFF
- Hard Drive Form Factor (metric): 8.9 cm LFF
- Bundled With: HPE Smart Carrier
- Product Type: Hard drive
COMPATIBLE WITH:
PROLIANT DL SERIES
PROLIANT ML SERIES
PROLIANT SL SERIES
** This list may not be complete. Contact us via Live Chat if you have any questions about compatibility.
FREQUENTLY ASKED QUESTIONS ABOUT 872487-B21
What is the difference between 872487-B21 and 872745-001?
They are the same physical drive under different HPE numbering schemes. 872487-B21, the subject of this page, is the option part number — the orderable configuration number used when specifying or expanding a server. 872745-001 is the spare part number, used for field replacement of an installed drive. This family also includes one assembly revision and seven OEM drive models, all listed in the cross-reference block on this page.
What is an assembly number and what is an OEM model number?
An assembly part number identifies a specific build revision of the drive as manufactured and integrated by HPE, and can change as revisions are introduced without altering the option number. An OEM model number is the drive manufacturer's own designation printed on the drive label, and several may map to a single HPE option because HPE qualifies more than one source. All of them describe the same 4TB SAS 12G 7.2K LFF product represented by 872487-B21.
Which servers accept this drive?
872487-B21 is supported in ProLiant systems with 3.5-inch LFF bays, including DL60 Gen9, DL80 Gen9, DL120 Gen9, DL160 Gen9, DL180 Gen9, DL320e Gen8 v2, DL360e Gen8, DL360p Gen8, DL360 Gen9, DL360 Gen10, DL380e Gen8, DL380p Gen8, DL380 Gen9, DL380 Gen10, DL388 Gen9, ML150 Gen9, ML310e Gen8 v2, ML350p Gen8, ML350 Gen9, SL4540 Gen8 and SL4545 G7. Confirm the target chassis is configured with LFF bays rather than SFF.
What carrier does it ship on?
The drive is bundled with an HPE Smart Carrier sized for 3.5-inch LFF bays. The carrier makes the drive hot-swap capable, so it can be installed or removed while the server remains powered, subject to the controller and array configuration in use. Because the carrier is included, no separate tray or blank conversion kit is required for an LFF bay.
What performance characteristics should I expect?
This is a midline 7,200 rpm mechanical drive with a 12 Gb/s SAS interface, one SAS 12 Gb/s port and 512 bytes per sector. As part of the HPE Business Critical line, it is intended for high-capacity, lower-IOPS workloads such as bulk storage, backup targets and archival volumes rather than transactional databases. Capacity is 4TB per drive in a single 3.5-inch bay.
HPE PARTSURFER INFO FOR 872487-B21
| Spare PN | Description | |
|---|---|---|
 | 872745-001 | 4TB hard disk drive - SAS interface, 12Gb/s interface, 3.5-inch large form factor (LFF), 7,200 RPM, smart carrier (SC), dual port (DP), digitally signed firmware |
Last Updated: 2026-08-07
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- Digitally Signed Firmware
- Yes
- Estimated Release
- 2017
- Form Factor
- LFF (3.5 inch)
- Form Factor/Carrier Type
- LFF / Smart Carrier (SC)
- HDD Data Transfer Rate
- 12 Gb/sec (12G)
- HDD Performance Level
- Midline (MDL)
- HDD Rotational Speed
- 7,200 rpm (7.2K)
- HDD Storage Capacity
- 4 TB
- Hotplug Carrier Type
- Smart Carrier (SC)
- Interface
- SAS
1 Review
This product is warrantied against hardware failure for a period of 1 Year from the date of purchase. Before making a purchase, please take a moment to review our return policy below.
Returns
It is the customer's responsibility to verify compatibility with their machine(s) before placing an order. If an item is ordered by mistake, it can be returned for refund, minus a 25% restocking fee, within 5 business days of receipt. The cost of freight is not refundable.
Please be aware that factory-sealed equipment can only be returned if it remains unopened.
Defective Products
If you have received a defective part and your machine is still within the HPE warranty period, please initiate a warranty exchange by visiting the HPE Enterprise Support Center. Be sure to have the serial numbers of the defective drive and your server/storage array handy.
In case your hardware becomes defective during the Global One warranty period, but the HPE warranty has expired, you can return the product to us for a working replacement. You are responsible for the shipment of returned merchandise. However, we will cover the expense of Ground /Economy shipment for the replacement item(s).
Requesting an RMA
To initiate a return or warranty claim, please complete and submit the RMA Request Form.
