This item, 636611-B21, is the HPE option part number for the product described as 400GB 3G SATA MLC LFF (3.5-inch) Enterprise Mainstream Solid State Drive. Further details below.
The HPE 400GB 3G SATA MLC LFF (3.5-inch) Enterprise Mainstream Solid State Drive (636611-B21) is a genuine HPE 400GB Enterprise Mainstream solid state drive built on multi-level cell (MLC) flash. It uses a SATA interface at 3 Gb/s. It is an LFF (3.5-inch) drive, and HPE PartSurfer's spare-part record describes it as hot-plug.
HPE's ProLiant DL380 G7 QuickSpecs list it; the server is shown in the Compatible With section below. Every part ships tested or factory sealed and is backed by a 1-year replacement warranty.
HPE Option Part #: 636611-B21
HPE Spare Part #: 637078-001
PRODUCT SPECIFICATIONS FOR 636611-B21:
- Product Number: 636611-B21
- Capacity: 400GB
- Drive type: Solid state drive
- Interface: SATA 3G
- Drive form factor: LFF (3.5-inch)
- Performance class: Enterprise Mainstream
- Flash type: multi-level cell (MLC)
- Plug type: Hot pluggable
- Weight: 2.50 lb
- Warranty: 1 year
COMPATIBLE WITH:
PROLIANT DL SERIES
** This list may not be complete. Check HPE's QuickSpecs for your server to verify compatibility.
FREQUENTLY ASKED QUESTIONS FOR 636611-B21:
- Which HPE ProLiant servers list 636611-B21?
HPE's ProLiant DL380 G7 QuickSpecs (c04199811, version 65, page 25) list this drive. The server is shown in the Compatible With section of this page. - What interface and form factor does 636611-B21 use?
This is a SATA 3 Gb/s drive in the LFF (3.5-inch) form factor; HPE PartSurfer's spare-part record describes it as a hot-plug drive. - Does HPE publish performance figures for 636611-B21?
Not in its drive QuickSpecs: HPE's Solid State Disk Drives QuickSpecs (a00001288enw, version 77) do not list this drive, so endurance and performance figures are not stated here. HPE's name classes it as Enterprise Mainstream, built on multi-level cell (MLC) flash.
Last Updated: 2026-10-20
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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.
