NAS Drive Compatibility

Western Digital Red Plus 4TB

NAS HDD

Part number WD40EFPX - 68C6CN0 · Red Plus series · 3.5" SATA HDD. If your machine is listed below, this drive is officially supported — not a forum workaround.

Red PlusNAS HARD DRIVE3.5" SATA HDDWESTERN DIGITAL

Part of the Western Digital Red Plus series →

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55
Compatible NAS models
36 Syn · 0 QNAP · 19 Asus · 0 TM
By vendor
4 TB
Listed capacity
Western Digital
Manufacturer
NAS
Product line (manufacturer rating)
5400
Spindle speed (RPM)
CMR
Recording
256 MB
Cache
180 TB
Rated workload / year

Specifications are the manufacturer's published ratings for this product series; verify the exact part number before purchase.

Strong pick as a cold copy

Rated CMR (conventional magnetic recording) — the right recording type for a large cold copy. CMR keeps a full-library backup pass fast even at 16–24 TB, which is the whole point of the offline slot in a 3-2-1 plan: rotate two drives monthly, keep one powered off, and the backup tooling (Veeam, Duplicati, Hyper Backup, HBS 3) does the scheduling. Full rule and vendor tool table: 3-2-1 for NAS.

Compatibility verdict

It appears on the official compatibility lists of 55 machines and series — 36 Synology, 19 Asustor. This is a NAS-class drive: built for 24/7 operation with vibration compensation for multi-bay enclosures — the right tier for most 1-8 bay home or small-office NAS units. Its series rating is on file as CMR (conventional) — what RAID rebuilds and full-library copies want.

Compatible NAS models

Synology DS1019+5-bay See its full HCL → Synology DS1181-bay See its full HCL → Synology DS119j1-bay See its full HCL → Synology DS120j1-bay See its full HCL → Synology DS1241-bay See its full HCL → Synology DS1520+5-bay See its full HCL → Synology DS1522+5-bay See its full HCL → Synology DS1618+6-bay See its full HCL → Synology DS1621+6-bay See its full HCL → Synology DS1819+8-bay See its full HCL → Synology DS1821+8-bay See its full HCL → Synology DS2182-bay See its full HCL → Synology DS218+2-bay See its full HCL → Synology DS218j2-bay See its full HCL → Synology DS218play2-bay See its full HCL → Synology DS220+2-bay See its full HCL → Synology DS220j2-bay See its full HCL → Synology DS2232-bay See its full HCL → Synology DS223j2-bay See its full HCL → Synology DS224+2-bay See its full HCL → Synology DS4184-bay See its full HCL → Synology DS418j4-bay See its full HCL → Synology DS418play4-bay See its full HCL → Synology DS420+4-bay See its full HCL → Synology DS420j4-bay See its full HCL → Synology DS4234-bay See its full HCL → Synology DS423+4-bay See its full HCL → Synology DS718+7-bay See its full HCL → Synology DS720+7-bay See its full HCL → Synology DS723+7-bay See its full HCL → Synology DS918+4-bay See its full HCL → Synology DS920+4-bay See its full HCL → Synology DS923+4-bay See its full HCL → Synology DVA1622 See its full HCL → Synology DVA3219 See its full HCL → Synology DVA3221 See its full HCL → Asustor AS 11 See its full HCL → Asustor AS 11TL See its full HCL → Asustor AS 31/32 See its full HCL → Asustor AS 31/32 v2 See its full HCL → Asustor AS 33 See its full HCL → Asustor AS 33 v2 See its full HCL → Asustor AS 40 See its full HCL → Asustor AS 52/53 See its full HCL → Asustor AS 54 See its full HCL → Asustor AS 61/62 See its full HCL → Asustor AS 63/64 See its full HCL → Asustor AS 65 See its full HCL → Asustor AS 65R See its full HCL → Asustor AS 66 See its full HCL → Asustor AS 67 See its full HCL → Asustor AS 68 See its full HCL → Asustor AS 71 See its full HCL → Asustor AS 71R See its full HCL → Asustor AS5004U See its full HCL →

Same-capacity alternatives

Other drives listed at 4 TB capacity, ranked by how many machines list them:

Toshiba MG04ACA400E 451 machines · MG04ACA**** Western Digital WD4003FFBX 390 machines · Red Pro Seagate ST4000NE0015 379 machines · Enterprise NAS HDD Toshiba MG04ACA400N 353 machines · MG04ACA**** Western Digital WD40PURZ 352 machines · Purple Seagate ST4000NM002A 346 machines · Exos 7E8 Seagate ST4000NE0025 344 machines · IronWolf Pro Western Digital HUS726T4TALA6L4 333 machines · Ultrastar 7K6

Quick answers

Is the WD40EFPX - 68C6CN0 officially compatible with my NAS?

It appears on the official compatibility lists of 55 machines and series — 36 Synology, 19 Asustor. Every machine page linked below shows the vendor's own list entry, refreshed daily.

Is the WD40EFPX - 68C6CN0 CMR or SMR?

As a Western Digital Red Plus drive, it is rated CMR. CMR (conventional magnetic recording) is what a RAID array wants: SMR drives slow rebuilds dramatically. See the <a href="/faq/cmr-vs-smr-nas-drives/">CMR vs SMR guide</a> for the full series table.

Is the WD40EFPX - 68C6CN0 a good NAS drive?

This is a NAS-class drive: built for 24/7 operation with vibration compensation for multi-bay enclosures — the right tier for most 1-8 bay home or small-office NAS units. Its series rating is on file as CMR (conventional) — what RAID rebuilds and full-library copies want.

Can I use the WD40EFPX - 68C6CN0 for a 3-2-1 cold backup copy?

Rated CMR (conventional magnetic recording) — the right recording type for a large cold copy. CMR keeps a full-library backup pass fast even at 16–24 TB, which is the whole point of the offline slot in a 3-2-1 plan: rotate two drives monthly, keep one powered off, and the backup tooling (Veeam, Duplicati, Hyper Backup, HBS 3) does the scheduling. Full rule and vendor tool table: 3-2-1 for NAS.

What are alternatives to the WD40EFPX - 68C6CN0?

At the same capacity, the most widely listed alternatives are Toshiba MG04ACA400E (451 machines), Western Digital WD4003FFBX (390 machines), Seagate ST4000NE0015 (379 machines). The full ranked list is below.