Western Digital Se 4TB

Enterprise HDD

Part number WD4000F9YZ - 09N20L0 · Se series · 3.5" SATA HDD. If your machine is listed below, this drive is officially supported — not a forum workaround.

Part of the Western Digital Se series →

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112

Compatible NAS models

112 Syn · 0 QNAP · 0 Asus · 0 TM

By vendor

4 TB

Listed capacity

Western Digital

Manufacturer

3-2-1 cold backup fit

No series-level recording rating is on file for this part number yet — check the exact model for CMR vs SMR before buying it as a large cold copy (SMR is the one trait that makes a 16 TB+ backup copy painfully slow). The 3-2-1 guide and the backup tools encyclopedia cover what to schedule it with.

Compatibility verdict

It appears on the official compatibility lists of 112 machines and series — 112 Synology. This is a Enterprise-class drive: rated for heavier sustained workloads than desktop drives. It is a strong pick for a NAS running 24/7, large-array rebuilds or camera workloads, and enterprise lines are also the drives most widely listed across all five vendors' HCLs. No series-level recording rating is on file for this part number yet, so check CMR vs SMR on the exact model before buying for an array.

Compatible NAS models

Synology DS1010+5-bay See its full HCL → Synology DS1091-bay See its full HCL → Synology DS109+1-bay See its full HCL → Synology DS110+1-bay See its full HCL → Synology DS110j1-bay See its full HCL → Synology DS1111-bay See its full HCL → Synology DS1121-bay See its full HCL → Synology DS112+1-bay See its full HCL → Synology DS112j1-bay See its full HCL → Synology DS1151-bay See its full HCL → Synology DS1161-bay See its full HCL → Synology DS1511+5-bay See its full HCL → Synology DS1512+5-bay See its full HCL → Synology DS1513+5-bay See its full HCL → Synology DS15155-bay See its full HCL → Synology DS1515+5-bay See its full HCL → Synology DS15175-bay See its full HCL → Synology DS1517+5-bay See its full HCL → Synology DS1812+8-bay See its full HCL → Synology DS1813+8-bay See its full HCL → Synology DS1815+8-bay See its full HCL → Synology DS18178-bay See its full HCL → Synology DS1817+8-bay See its full HCL → Synology DS2015xs See its full HCL → Synology DS2092-bay See its full HCL → Synology DS209+2-bay See its full HCL → Synology DS209+II2-bay See its full HCL → Synology DS210+2-bay See its full HCL → Synology DS210j2-bay See its full HCL → Synology DS2112-bay See its full HCL → Synology DS211+2-bay See its full HCL → Synology DS211j2-bay See its full HCL → Synology DS2122-bay See its full HCL → Synology DS212+2-bay See its full HCL → Synology DS212j2-bay See its full HCL → Synology DS2132-bay See its full HCL → Synology DS213+2-bay See its full HCL → Synology DS213air2-bay See its full HCL → Synology DS2142-bay See its full HCL → Synology DS214+2-bay See its full HCL → Synology DS214play2-bay See its full HCL → Synology DS215+2-bay See its full HCL → Synology DS215j2-bay See its full HCL → Synology DS216j2-bay See its full HCL → Synology DS216play2-bay See its full HCL → Synology DS218j2-bay See its full HCL → Synology DS2411+12-bay See its full HCL → Synology DS2413+12-bay See its full HCL → Synology DS2415+12-bay See its full HCL → Synology DS3611xs12-bay See its full HCL → Synology DS3612xs12-bay See its full HCL → Synology DS3615xs12-bay See its full HCL → Synology DS4094-bay See its full HCL → Synology DS409+4-bay See its full HCL → Synology DS4104-bay See its full HCL → Synology DS410j4-bay See its full HCL → Synology DS4114-bay See its full HCL → Synology DS411+4-bay See its full HCL → Synology DS411+II4-bay See its full HCL → Synology DS411j4-bay See its full HCL → Synology DS412+4-bay See its full HCL → Synology DS4134-bay See its full HCL → Synology DS413j4-bay See its full HCL → Synology DS4144-bay See its full HCL → Synology DS414j4-bay See its full HCL → Synology DS415+4-bay See its full HCL → Synology DS415play4-bay See its full HCL → Synology DS4164-bay See its full HCL → Synology DS509+5-bay See its full HCL → Synology DS710+7-bay See its full HCL → Synology DS712+7-bay See its full HCL → Synology DS713+7-bay See its full HCL → Synology DS7157-bay See its full HCL → Synology RS10613xs+ See its full HCL → Synology RS1219+ See its full HCL → Synology RS18016xs+ See its full HCL → Synology RS212 See its full HCL → Synology RS217 See its full HCL → Synology RS2211+ See its full HCL → Synology RS2211RP+ See its full HCL → Synology RS2212+ See its full HCL → Synology RS2212RP+ See its full HCL → Synology RS2414+ See its full HCL → Synology RS2414RP+ See its full HCL → Synology RS2416+ See its full HCL → Synology RS2416RP+ See its full HCL → Synology RS3411RPxs See its full HCL → Synology RS3411xs See its full HCL → Synology RS3412RPxs See its full HCL → Synology RS3412xs See its full HCL → Synology RS3614RPxs See its full HCL → Synology RS3614xs See its full HCL → Synology RS3614xs+ See its full HCL → Synology RS3617xs See its full HCL → Synology RS409 See its full HCL → Synology RS409+ See its full HCL → Synology RS409RP+ See its full HCL → Synology RS411 See its full HCL → Synology RS810+ See its full HCL → Synology RS810RP+ See its full HCL → Synology RS812 See its full HCL → Synology RS812+ See its full HCL → Synology RS812RP+ See its full HCL → Synology RS814 See its full HCL → Synology RS814+ See its full HCL → Synology RS814RP+ See its full HCL → Synology RS815 See its full HCL → Synology RS815+ See its full HCL → Synology RS815RP+ See its full HCL → Synology RS816 See its full HCL → Synology RS818+ See its full HCL → Synology RS818RP+ 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 WD4000F9YZ - 09N20L0 officially compatible with my NAS?

It appears on the official compatibility lists of 112 machines and series — 112 Synology. Every machine page linked below shows the vendor's own list entry, refreshed daily.

Is the WD4000F9YZ - 09N20L0 a good NAS drive?

This is a Enterprise-class drive: rated for heavier sustained workloads than desktop drives. It is a strong pick for a NAS running 24/7, large-array rebuilds or camera workloads, and enterprise lines are also the drives most widely listed across all five vendors' HCLs. No series-level recording rating is on file for this part number yet, so check CMR vs SMR on the exact model before buying for an array.

Can I use the WD4000F9YZ - 09N20L0 for a 3-2-1 cold backup copy?

No series-level recording rating is on file for this part number yet — check the exact model for CMR vs SMR before buying it as a large cold copy (SMR is the one trait that makes a 16 TB+ backup copy painfully slow). The 3-2-1 guide and the backup tools encyclopedia cover what to schedule it with.

What are alternatives to the WD4000F9YZ - 09N20L0?

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.