Synology HAT5320-24T is Synology's current 24TB enterprise SATA hard drive for systems that qualify the HAT enterprise HDD family. The value proposition is not simply the capacity; it is Synology qualification, DSM-visible firmware handling and a support path aligned with Synology storage systems.
That premium has to be earned. A general enterprise HDD such as WD Ultrastar HC590, Seagate Exos or Toshiba MG11 can be cheaper per terabyte, but it may not carry the same Synology qualification for a given model. The exact Synology NAS, launch year, DSM version and compatibility list decide the practical answer.
Choose the Synology HAT5320-24T when the storage system is a Synology SATA platform where official drive qualification, DSM firmware updates and support clarity matter more than lowest price per TB. Do not buy it merely because it is 24TB; compare the premium against Red Pro, IronWolf Pro, Exos, Ultrastar HC590 and Toshiba MG11 if the exact Synology model permits third-party drives.
Manufacturer-published values for the exact product family. Retail listings can collapse these details, so match the part number before ordering.
| Spec | Value |
|---|---|
| Model number | HAT5320-24T |
| Capacity | 24TB decimal marketed capacity |
| Recording technology | CMR in current HAT5320-24T product-spec/channel data; verify the exact procurement document if recording method is a purchase-order requirement |
| Platform | Synology-qualified 3.5-inch enterprise SATA HDD with DSM-integrated firmware management |
| Interface | SATA 6Gb/s |
| Sector format | 3.5-inch enterprise SATA HDD; confirm logical sector exposure against the selected Synology compatibility entry |
| Spindle speed | 7200 RPM |
| Cache / buffer | 1GiB / 1024MB in current product-spec/channel data; not exposed in the crawlable Synology product table |
| Maximum sustained transfer rate | 309MB/s maximum sustained data transfer speed, typical |
| Workload rating | 550TB/year |
| Reliability rating | Up to 2.5M hours |
| Warranty | 5-year limited warranty |
| Power | 4.35W active idle; 8.11W random read/write 4KB Q1 typical |
| Acoustics | Synology's public product page does not expose an acoustic row; avoid buying it as a quiet-drive upgrade without checking the full specification PDF. |
| Operating temperature | 5C to 60C operating; -40C to 70C non-operating |
| Compatibility note | Synology-qualified SATA HDD for systems whose compatibility list includes HAT5320-24T; exact NAS model and DSM policy still decide support behavior. |
No exact in-stock live row is currently matched for HAT5320-24T. Relevant live alternatives are shown so the page does not collapse into an empty catalogue.
Live prices · updated every 4-5 hours · last checked 5 hr ago · exact model not currently matched in live stock
| Model | Capacity | Recording | RPM | Workload TB/yr | Warranty | $/TB | Price | |
|---|---|---|---|---|---|---|---|---|
| 16TB HAT5310-16T | 16TB | CMR | 7,200 | — | 5 yr | $63.25 | $1012 | Buy |
Workload rating is recorded per part number from Seagate's datasheet for that exact model, 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 | 100TB raw target | 500TB raw target | 1PB raw target |
|---|---|---|---|---|---|
| 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. | |||||
Raw capacity is not usable capacity. This table shows the slot-level math before filesystem overhead, snapshots, reserved space and vendor-specific parity layouts.
| Drive count | Raw capacity | Single-parity usable | Dual-parity usable |
|---|---|---|---|
| 4 bays | 96TB | 72TB | 48TB |
| 6 bays | 144TB | 120TB | 96TB |
| 8 bays | 192TB | 168TB | 144TB |
| 12 bays | 288TB | 264TB | 240TB |
Raw capacity examples for common Synology deployments before parity, filesystem overhead and snapshots.
| Drive count | Raw capacity | Single-parity usable | Dual-parity usable |
|---|---|---|---|
| 4 drives | 96TB | 72TB | 48TB |
| 8 drives | 192TB | 168TB | 144TB |
| 12 drives | 288TB | 264TB | 240TB |
| 24 drives | 576TB | 552TB | 528TB |
The concrete reason to buy HAT5320-24T is not that a 24TB SATA drive is rare. It is that Synology validates and integrates its own drive families with DSM and the supported hardware. Synology's HAT page emphasizes hardware/software integration, extensive validation hours and firmware updates that can be handled through DSM.
That matters most in business systems where support time has real cost. If a storage pool is part of production operations, the buyer may rationally pay more to remove argument about drive qualification. If the NAS model freely supports third-party HDDs and support policy is less important, the premium deserves more scrutiny.
Synology compatibility cannot be reduced to a slogan. The site's drive-policy data distinguishes 2025 DiskStation Plus behavior from Value/J, RS Plus and enterprise lines. Some classes allow unlisted third-party HDDs for new pools; other classes are migration-only or more restrictive. Older pre-2025 systems are governed differently.
HAT5320-24T should therefore be checked against the specific NAS model and expansion unit. A desktop DiskStation SATA bay, a rackmount RS unit and an enterprise HA/SAN platform do not have identical support rules.
Against Ultrastar, Exos, Toshiba MG11, IronWolf Pro or WD Red Pro, HAT5320's advantage is not a secret performance tier. It is the first-party Synology qualification and operational integration. The public Synology page lists the same kind of nearline headline figures buyers expect from high-capacity enterprise disks: 7200 RPM, 550TB/year workload class, up to 2.5M-hour MTBF, five-year warranty and 309MB/s typical maximum sustained transfer speed for the 24TB model.
If a deployment is outside Synology, the case becomes much weaker. A non-Synology server usually gains little from paying a Synology drive premium unless the organization has standardized on those parts for spares.
At 24TB, rebuilds are still large events. Synology SHR and conventional RAID layouts can make expansion easier, but they do not change the amount of data that must be read and rebuilt. Use dual-drive fault tolerance for larger pools and size snapshots, backup windows and replacement spares realistically.
DSM firmware update handling is part of the HAT value proposition. That does not remove the need to read release notes, keep backups and verify model support before mixing drives or expanding an older pool.
A Synology-branded 24TB drive can carry a premium over general enterprise HDDs. The right test is total operational cost: support exposure, staff time, procurement simplicity, warranty, spare strategy and live price per protected terabyte.
When exact HAT5320-24T inventory is not live, older HAT rows can provide pricing context but are not exact 24TB stock. If the system supports third-party drives, compare WD Red Pro, IronWolf Pro, Ultrastar HC590, Exos X24 and Toshiba MG11 deliberately.
HAT5320-24T is Synology's 24TB HAT enterprise-series 3.5-inch SATA hard drive.
No. Compatibility depends on the exact Synology model, expansion unit, DSM generation and compatibility list. Check the model-specific Synology list before buying.
Choose it when Synology qualification, DSM firmware handling and support clarity are worth the premium. Choose a general enterprise drive when the Synology system supports it and price per TB matters more.
Eight 24TB drives provide 192TB raw before RAID, filesystem overhead and snapshots.
No. Price per TB is the first screen, not the whole decision. Match recording method, interface, bay count, firmware support, warranty position and rebuild risk before accepting the cheapest row.
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.