HPE 870759-B21 900GB 12G 15K 2.5 Server Hard Drive

HPE 870759-B21 900GB SAS 12G 15K SFF SC DS Hard Drive

The HPE 870759-B21 is a 900GB Enterprise hard drive for HPE ProLiant servers. It spins at 15,000 rpm, connects through 12Gb/s SAS and comes in the 2.5in small form factor inside an HPE SmartCarrier. The firmware is digitally signed and the disk uses 512n sectors.

With 900GB per disk, this is the high-capacity choice among HPE’s 15K SFF drives of this generation. It suits teams that want the quick response of a 15K spindle without filling every bay to reach the space they need. Typical homes are Gen9 and Gen10 rack servers running databases, virtual desktops or busy line-of-business systems.

New and Refurbished 870759-B21 drives are available from Euroland IT Store, subject to stock at the time of order.

HPE 870759-B21 Technical Specifications

What Is The HPE 870759-B21?

870759-B21 is HPE’s option kit number for this drive. It is the number you would see on a quote or a purchase order. When HPE supplies the same drive as a service replacement, it uses spare number 870795-001. The disk inside can be one of several approved models, including EH000900JWCPN, EH000900JWHPP and EH000900JXLVU.

The exact number matters because HPE also sells a 900GB 15K SFF drive with 512e sectors (870765-B21). The two look alike and share capacity and speed, but they report sectors differently. Choosing the right one keeps your array consistent.

512n Or 512e: Picking The Right 900GB 15K Drive

A 512n drive stores and reports data in 512-byte sectors. A 512e drive stores data in 4K physical sectors and emulates 512-byte sectors for the host. Both work in modern ProLiant servers with current Smart Array firmware.

The difference shows up in older operating systems and in some database or backup tools that expect native 512-byte sectors. If you are adding to an existing array, match what is already there. If the array is built from 870759-B21 drives, stay with 512n. If you are starting fresh on a Gen10 server, either type will work, but keep the whole array the same.

Capacity Planning With 900GB Disks

Performance in a spinning-disk array grows with the number of spindles. Eight 900GB drives in RAID 10 give around 3.6TB of usable space and the random input and output of eight 15K disks. If you need more speed rather than more space, more smaller drives may be the better buy. If bays are scarce, 900GB gives the most space per slot at 15K.

New HPE 870759-B21

Choose new when building a fresh array or adding disks to a production server where you want every drive to start from zero hours. The product page sets out the warranty for new units.

Refurbished HPE 870759-B21

Refurbished drives give the same capacity and speed at a lower price. They suit replacements for failed disks, lab servers and spare stock. Condition and warranty for refurbished units are shown on the product page.

Compatibility

• HPE ProLiant Gen8 servers with SFF SmartCarrier bays
• HPE ProLiant Gen9 SFF rack, tower and blade servers
• HPE ProLiant Gen10 SFF servers
• HPE Synergy 480 and 660 compute modules, Gen9 and Gen10

Before ordering, check the label on your existing drive, the server model and the controller. Make sure your Smart Array firmware is up to date when adding drives to an older server.

Related Part Numbers

• HPE 870795-001: the spare part number for this drive.
• HPE 870765-B21: the 900GB 15K SFF drive with 512e sectors.
• HPE 870761-B21: listed in our catalogue as a 900GB SAS 12G 15K 3.5in drive for LFF bays.
• HPE EH000900JWHPK: a 900GB SAS 12G 15K 2.5in drive model.
• HPE 870759-001 listing: another 900GB SAS 12G 15K 2.5in page in our range.
• See all HPE products we stock.

Checking You Have The Right Drive

1. Read the label on your current drive for 870759-B21 or 870795-001.
2. If it shows 870765-B21 or 870798-001 instead, you have the 512e version.
3. Confirm the server has 2.5in SFF SmartCarrier bays.
4. Check the Smart Array controller and its firmware level.
5. Back up the data before you add or replace drives.

Buying HPE 870759-B21 in the UK

Euroland IT Store supplies UK businesses, IT departments, resellers and repair centres. The product page shows the condition, warranty, stock and delivery details. Orders over £100 + VAT qualify for free shipping to the UK mainland. For help choosing, send us your server model and the part numbers on your existing drives, or call 0203 209 6002.

Frequently Asked Questions

Which servers support the HPE 870759-B21?

It is used in HPE ProLiant Gen8, Gen9 and Gen10 servers with SFF SmartCarrier bays and in HPE Synergy 480 and 660 modules.

Should I choose a New or Refurbished 870759-B21?

New is best for fresh arrays and critical servers, while Refurbished is a cost-effective choice for replacing a failed disk or holding spares.

What warranty does the 870759-B21 carry?

The warranty varies with condition, and the terms for each option are given on the product page.

Is delivery available across the UK?

Yes, we deliver throughout the UK, with free UK mainland shipping on orders over £100 + VAT.

What is the difference between 870759-B21 and 870765-B21?

Both are 900GB 15K SFF SmartCarrier drives, but 870759-B21 uses 512n sectors and 870765-B21 uses 512e sectors.