P80577-B21 is HPE's 26TB SAS 12Gb Business Critical 7.2K LFF low-profile 512e ISE hard-drive option for qualified ProLiant configurations. Treat it as an HPE option kit purchase, not as a generic 26TB mechanism.
The buying risk is identity drift: a bare 26TB SAS drive may share a mechanism family, but it does not automatically carry HPE firmware, carrier fit, support entitlement or Smart Array qualification.
Buy P80577-B21 only after verifying the exact ProLiant chassis, LFF carrier, controller and firmware path. For multipath or SAS-standardized fleets it is the right 26TB HPE option; for simple nearline capacity P80578-B21 SATA may be sufficient.
Verify the part number, carrier, firmware, sector format and server or storage-array qualification before ordering. A bare mechanism or third-party compatible listing can be useful, but it is an alternative unless it is sold as the qualified OEM kit or spare you need.
These are the verified procurement identifiers and configuration constraints that should survive from quote to purchase order.
| Specification | Value |
|---|---|
| OEM | HPE |
| Part number / identity | P80577-B21 |
| Capacity | 26TB raw decimal capacity per drive |
| Interface | 12Gb/s SAS |
| RPM | 7,200 RPM |
| Form factor | 3.5-inch LFF low-profile |
| Sector format | 512e |
| Hot-plug | Hot-plug in supported LFF bays |
| Carrier | HPE low-profile Smart Carrier option kit |
| Encryption | ISE; not listed as SED/FIPS in the cited HPE entry |
| Workload class | Business Critical / Midline, medium workload |
| Compatible systems | Specific ProLiant configurations with LFF SAS/SATA backplanes and qualified Smart Array or HBA support |
| Best use | Dense nearline capacity where HPE qualification, SAS dual-port architecture and OEM firmware path matter |
| Kit status | HPE -B21 orderable option; HPE notes -H21/-K21 variants can replace -B21 for some server family lines |
No exact in-stock live row is currently matched for P80577-B21. Relevant live alternatives are shown for pricing context; verify qualification before treating any row as a substitute.
Live prices · updated every 4-5 hours · last checked 33 min ago · not exact OEM replacements; verify qualification, carrier, firmware and interface before ordering
| Model | Capacity | Recording | RPM | Workload TB/yr | Warranty | $/TB | Price | |
|---|---|---|---|---|---|---|---|---|
| 1TB ST31000640SSREFURB | 1TB | CMR | 7,200 | — | — | $14.99 | $15 | Buy |
| 4TB 695842-001 | 4TB | CMR | 7,200 | — | — | $15.00 | $60 | Buy |
| 1TB 508011-001REFURB | 1TB | CMR | 7,200 | — | — | $26.99 | $27 | Buy |
| 24TB WUH722424ALE604REFURB | 24TB | CMR | 7,200 | 550 | 5 yr | $28.71 | $689 | Buy |
| 24TB ST24000NM002HREFURB | 24TB | CMR | 7,200 | 550 | 5 yr | $29.17 | $700 | Buy |
| 12TB MB012000GWWFEREFURB | 12TB | CMR | 7,200 | — | 5 yr | $30.00 | $360 | Buy |
| 4TB 846523-004REFURB | 4TB | CMR | 7,200 | — | — | $30.00 | $120 | Buy |
| 8TB 834031-B21 | 8TB | CMR | 7,200 | — | — | $32.75 | $262 | Buy |
| 2TB AP072B321REFURB | 2TB | CMR | 7,200 | — | — | $34.49 | $69 | Buy |
| 12TB MB012000GWWFEREFURB | 12TB | CMR | 7,200 | — | 5 yr | $34.50 | $414 | Buy |
| 24TB ST24000DM001 | 24TB | CMR | 7,200 | — | — | $35.83 | $860 | Buy |
| 26TB WD260KFGX | 26TB | CMR | 7,200 | — | — | $43.25 | $1124 | Buy |
| 24TB WD241KFGX | 24TB | CMR | 7,200 | 550 | 5 yr | $44.17 | $1060 | Buy |
| 24TB ST24000NM000H | 24TB | CMR | 7,200 | 550 | 5 yr | $58.37 | $1401 | Buy |
Workload rating is recorded per part number from the manufacturer's published data for that exact model where available, not blanketed across the line — two drives of the same capacity can differ because they are different generations. A dash means the figure is not stated for that listing. Recording technology comes from the manufacturer's published CMR/SMR list; a model absent from that list is shown as UNVERIFIED rather than guessed. Rows priced above 3× this line's in-stock median are flagged and excluded from the winner callout and from every median we compute.
This table is computed from live DatacenterDisk rows when an exact in-stock match exists. It is intentionally blank for unavailable models rather than filled with stale prices.
| Live model | Drive price | $/TB | 1 drive | 4 drives | 8 drives | 12 drives |
|---|---|---|---|---|---|---|
| No exact in-stock row is available right now. Use the availability table for nearby live alternatives, then re-check the exact model before ordering. | ||||||
These are procurement paths to evaluate when exact stock is absent. Alternatives still require the exact platform, controller, sector format, carrier and support policy to approve them.
| Alternative | When it can work | Procurement warning |
|---|---|---|
| P80577-B21 or documented HPE suffix variant | Best replacement path when the quote identifies the HPE-qualified 26TB SAS option for the target ProLiant family. | A bare SAS mechanism without HPE option identity, carrier and firmware path is not the same product. |
| P80578-B21 26TB SATA | Capacity alternative only when the server, controller, drive group and support policy qualify the SATA option. | Not a SAS dual-port or multipath substitute. |
| P68583-B21 24TB SAS | Same HPE Business Critical SAS path when 24TB is acceptable and the server qualifies the option. | Lower raw capacity; update spare and RAID planning. |
| Generic high-capacity enterprise HDD | Only under a support-approved non-OEM or bare-drive policy. | No HPE kit, Smart Carrier, firmware update path or support entitlement by default. |
Use this table before accepting a quote, especially when new, open-box, refurbished and bare-drive listings appear side by side.
| Check | Why it matters |
|---|---|
| Exact option | P80577-B21 must appear on the quote or listing when you need the exact OEM option. |
| Carrier | HPE low-profile Smart Carrier option kit |
| Firmware path | OEM-qualified firmware can decide update eligibility, health reporting and support handling. |
| Sector format | 512e must match the controller, array and existing drive group. |
| Condition | New, open-box, refurbished and used units should be compared as different offers, not as the same price point. |
| Support | 1-year limited warranty for HPE Midline hard drives |
Raw decimal capacity is shown before filesystem formatting, RAID, hot spares, snapshots or vendor overhead.
| Drive count | Raw capacity | Single-parity example | Dual-parity example |
|---|---|---|---|
| 4 drives | 104TB raw | 78TB before formatting | 52TB before formatting |
| 8 drives | 208TB raw | 182TB before formatting | 156TB before formatting |
| 12 drives | 312TB raw | 286TB before formatting | 260TB before formatting |
The verified HPE entry describes P80577-B21 as an HPE 26TB SAS 12G Business Critical 7.2K LFF low-profile one-year warranty helium 512e ISE multi-vendor HDD. In procurement terms, that is an HPE option identity with the carrier and firmware/support context expected by ProLiant buyers.
HPE also notes that -B21 option suffixes may be replaced by -H21 or -K21 on some server family lines. That does not make every suffix interchangeable; it means the server's current QuickSpecs must decide which orderable form belongs in the quote.
A 7.2K nearline HDD will not saturate 12Gb/s SAS in normal sequential reads. The reason to pay for SAS is usually dual-port architecture, multipath-capable storage design, controller qualification and fleet standardization, not a simple MB/s claim.
For a replacement drive, match the option, sector format and carrier to the existing drive group. For expansion, verify the controller supports the additional capacity and that your RAID policy accounts for long rebuild windows at 26TB per spindle.
The closest HPE 24TB SAS comparator in the current HPE Business Critical table is P68583-B21. A 26TB drive adds 2TB per bay, but the price premium, stock availability and spare strategy can make 24TB the cleaner buy.
The cited HPE identity is an HPE option for ProLiant configurations. If a listing is only a bare mechanism, treat it as an alternative unless the seller clearly supplies the HPE-qualified kit or spare you require.
HPE lists the option as ISE. The cited entry does not identify it as an SED or FIPS option.
No. Verify the exact server QuickSpecs, chassis, backplane, controller and firmware. Physical LFF fit is not the same as HPE qualification.
P80578-B21 is the 26TB SATA 6Gb Business Critical LFF low-profile counterpart.
Specification claims on this page were checked against the pages below on 1 September 2026. Where a widely-repeated figure did not survive that check, we report what the source says now and say so in the text rather than repeating the familiar number.