NAS Drive Compatibility

Seagate IronWolf Pro 20 TB

NAS HDD

Part number ST20000NEZ01 · IronWolf Pro series · 3.5'' SATA HDD. If your machine is listed below, this drive is officially supported — not a forum workaround.

IronWolf ProNAS HARD DRIVE3.5" SATA HDDSEAGATE

Part of the Seagate IronWolf Pro series →

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13
Compatible NAS models
0 Syn · 0 QNAP · 13 Asus · 0 TM
By vendor
20 TB
Listed capacity
Seagate
Manufacturer
NAS Pro tier
Product line (manufacturer rating)
7200
Spindle speed (RPM)
CMR
Recording
256 MB
Cache
300 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 13 machines and series — 13 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

Asustor AS 11 See its full HCL → Asustor AS 33 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 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 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 20 TB capacity, ranked by how many machines list them:

Toshiba MG10ACA20TE 144 machines · MG10 Toshiba MG11ACA20TE 135 machines · MG11 Series Toshiba MG10ACA20TA 133 machines · MG10 Seagate ST20000NM007D 130 machines · EXOS x20 Seagate ST20000NT001 119 machines · IronWolf Pro Toshiba HDWG62AUZSVA 111 machines · N300 Seagate ST20000NM002H 111 machines · EXOS X24 Western Digital WUH722020ALE6L4 111 machines · Ultrastar DC HC560

Quick answers

Is the ST20000NEZ01 officially compatible with my NAS?

It appears on the official compatibility lists of 13 machines and series — 13 Asustor. Every machine page linked below shows the vendor's own list entry, refreshed daily.

Is the ST20000NEZ01 CMR or SMR?

As a Seagate IronWolf Pro 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 ST20000NEZ01 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 ST20000NEZ01 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 ST20000NEZ01?

At the same capacity, the most widely listed alternatives are Toshiba MG10ACA20TE (144 machines), Toshiba MG11ACA20TE (135 machines), Toshiba MG10ACA20TA (133 machines). The full ranked list is below.