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Global leader in new, refurbished, compatible & discontinued multivendor IT-Hardware, spares and print supplies.
| Part Number: | 857644-S21 |
|---|---|
| Manufacturer: | HPE |
| Backup & Storage: | Server Hard Drive |
| Model: | DL360 Gen10/Gen9, DL380 Gen10/Gen9, ML350 Gen9 |
| Description: | Buy HPE 857644-S21 10TB 7.2K 3.5" SAS Hard Drive. Genuine part with fast worldwide shipping from Euroland IT Store UK. |
| Availability: | In Stock |
The HPE 857644-S21 is a 10TB, 3.5in large form factor hard drive with a 12Gb/s SAS interface and a 7,200 rpm spindle. It is offered as an alternative listing of the HPE 857644-B21 option, the Business Critical 10TB LFF drive used in many HPE ProLiant Gen10 servers and LFF storage enclosures.
Buyers usually look for this number when they want a 10TB SAS disk for a server that already runs 857644-B21 drives, or when a quote or asset register quotes the S21 code. The core profile is simple: 10TB, SAS 12G, 7.2K rpm, LFF, 512e sector format.
The Euroland IT Store lists 857644-S21 in New and Refurbished condition, subject to current stock.
| Specification | Details |
|---|---|
| Manufacturer | HPE |
| Part number | 857644-S21 |
| Alternative to option | 857644-B21 |
| Spare part of the B21 option | 857965-001 |
| Capacity | 10TB |
| Interface | SAS 12Gb/s |
| Rotational speed | 7,200 rpm |
| Form factor | 3.5in LFF |
| Drive class (B21 option) | Business Critical (Midline) |
| Sector format (B21 option) | 512e |
| Condition | New or Refurbished, subject to stock |
HPE uses the suffix -B21 for its standard option kits. In the trade, an -S21 suffix is generally used for an alternative or differently packaged version of the same option. HPE PartSurfer does not hold a separate record for 857644-S21, so we treat it as the S21 listing of 857644-B21 and describe it only by the facts that the B21 record confirms.
That B21 record describes a 10TB SAS 12G Business Critical 7.2K LFF helium 512e multi vendor drive with a SmartCarrier. Its spare part is 857965-001. If your drive must match one of those exact numbers for a support contract, tell us before ordering and we will confirm the label and carrier on the unit we ship.
HPE splits its hard drives into classes. Business Critical (the old Midline name) covers 7,200 rpm disks with a medium workload rating, aimed at backup, archive and reference data. Mission Critical drives spin at 10K or 15K for heavier random work.
A 10TB 7.2K disk shines where you need capacity per bay more than fast random response. File servers, Veeam repositories, surveillance storage and object stores are typical homes. For a busy database or many virtual desktops, pair it with SSD tiering or caching, or pick a faster class.
Choose a new drive when you are filling empty bays in a new deployment or when your organisation does not accept used storage in production. The product page shows the packaging and warranty that apply to new units.
A refurbished 857644-S21 is a lower cost route for repairs and for extending the life of an existing server. It is also handy as a shelf spare for a remote site. Please read the condition notes and warranty on the product page before buying.
Where the unit matches the 857644-B21 build, HPE where-used data for that drive points to these systems:
Always compare against the drive already in your server, and confirm the server model and carrier type. A LP carrier bay will not accept a SmartCarrier tray, and the reverse is also true.
Drive makers quote decimal terabytes, so a 10TB disk shows as roughly 9.1TiB in most operating systems. RAID then takes its share. Four 10TB drives in RAID 5 give about three drives of space, while RAID 6 gives two. Leave headroom for growth, as filling a large array close to full can slow writes and makes later expansion harder.
We work with companies, public sector IT teams, resellers and hardware repairers across the UK. For the latest condition, warranty, stock level and delivery details, see the product page. UK mainland orders above £100 + VAT ship at no charge. Need help? Email or call 0203 209 6002 with your server or enclosure model and the part numbers from your present drives.
The S21 code is sold as an alternative listing of the 857644-B21 option, a 10TB SAS 12G 7.2K LFF drive, and we can confirm the label and carrier of the unit before dispatch.
Units that match the B21 build fit Gen10 servers with 3.5in SmartCarrier bays, such as the DL380 Gen10 LFF, but check your server model and existing drive first.
New drives are unused stock for fresh builds, while Refurbished drives are previously used units that offer a lower cost option for repairs and spares.
The warranty for each condition is shown on the product page, and our team can answer any questions before you order.
Delivery is free to UK mainland addresses on orders over £100 + VAT, and other delivery options are shown at checkout.
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