Is Western Digital Red or Seagate IronWolf more compatible with Synology NAS?

On Synology's official list, Western Digital Red appears on 163 models and Seagate IronWolf on 169 models. Both are vendor-confirmed lines; check your exact model below.

What is the largest capacity: Western Digital Red or Seagate IronWolf?

Western Digital Red tops out at 14TB on the Synology list; Seagate IronWolf at 16TB.

Western Digital Red vs Seagate IronWolf

Both lines are on Synology's official compatibility list — this is not a "which works" question, but a "which fits your machine and workload" one. Everything below is read from Synology's own HCL, refreshed daily.

Western Digital Red NAS 163Synology models up to 14TB · 22 part numbers

Seagate IronWolf NAS 169Synology models up to 16TB · 32 part numbers

Head-to-head on the official list

	Western Digital Red	Seagate IronWolf
Listed on Synology HCL	163 models	169 models ✓
Largest listed capacity	14 TB	16 TB ✓
Smallest listed capacity	1 TB	1 TB
Part numbers on list	22	32 ✓
Product line	NAS	NAS

Which should you buy?

Coverage-wise, Western Digital Red appears on more Synology machines (163 vs 169) — for an older or unusual model that margin can matter. Within the same tier, the honest answer is: pick the cheaper part number at your target capacity, then verify it on your exact model's page.

Both lines overlap on 151 Synology models — if yours is one of them, either drive is officially supported.

Popular part numbers (most-listed 12 of 22 / 32)

Western Digital Red

WD60EFRX - 68L0BN1 — 6TB, 140 models
WD40EFRX - 68WT0N0 — 4TB, 139 models
WD20EFRX — 2TB, 133 models
WD10EFRX — 1TB, 133 models
WD30EFRX - 68EUZN0 — 3TB, 133 models
WD40EFRX - 68N32N0 — 4TB, 133 models
WD30EFRX - 68N32N0 — 3TB, 132 models
WD50EFRX - 68L0BN1 — 5TB, 129 models
WD10EFRX - 68PJCN0 — 1TB, 127 models
WD20EFRX - 68EUZN0 — 2TB, 122 models
WD60EFRX - 68MYMN1 — 6TB, 109 models
WD50EFRX - 68MYMN1 — 5TB, 108 models

Seagate IronWolf

ST2000VN004 - 2E4164 — 2TB, 150 models
ST3000VN007 - 2E4166 — 3TB, 150 models
ST1000VN002 - 2EY102 — 1TB, 146 models
ST3000VN007 - 2AH16M — 3TB, 140 models
ST4000VN008 - 2DR166 — 4TB, 140 models
ST6000VN0033 - 2EE110 — 6TB, 132 models
ST6000VN001 - 2BB186 — 6TB, 87 models
ST6000VN0041 - 2EL11C — 6TB, 84 models
ST8000VN0022 - 2EL112 — 8TB, 84 models
ST7000VN0002 - 2EL11B — 7TB, 82 models
ST10000VN0004 - 2GS11L — 10TB, 75 models
ST10000VN0004 - 1ZD101 — 10TB, 75 models

Synology models that list both lines

These machines officially support both Western Digital Red and Seagate IronWolf — your real decision is workload and price, not compatibility.