Compatible hard drives for QNAP TS-659 Pro
183 drives are on QNAP's official compatibility list for the TS-659 Pro, up to 6TB listed. Read from qnap.com, list refreshed 2026-11-03.
6-bay Legacy model
183
Listed drives
19
NAS line
72
Enterprise line
92
SSD & surveillance
This vendor publishes its compatibility list as an advisory tested matrix — drives not on it are not firmware-blocked. Treat the list as a quality signal; off-list drives work but fall outside the tested pairing.
Capacity range on the official list
Where to start on the TS-659 Pro
For a home or small-office workload, the NAS lines below balance sustained writes and RAID-rebuild tolerance. Enterprise speed is only worth paying for in full-bay builds:
- Western Digital NAS — listed in 6TB price
- HGST Deskstar NAS — listed in 4TB price
- HGST Deskstar NAS — listed in 4TB price
- HGST NAS — listed in 4TB price
Full TS-659 Pro compatibility list
Grouped by part number; Max shows the largest capacity QNAP lists. Filter by brand, line or capacity:
| Drive | Brand | Series | Line | Type | Max listed |
|---|---|---|---|---|---|
| MC04ACA600E | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 6 TB |
| ST6000NM0024 | Seagate | Seagate Enterprise Capacity | Enterprise | SATA 6Gb/s (SATA III) | 6 TB |
| WD60EFRX (Red NASware 3.0) | Western Digital | NAS | NAS | SATA 6Gb/s (SATA III) | 6 TB |
| MC04ACA500E | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 5 TB |
| MG04ACA500E | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 5 TB |
| H3IKNAS40003272SA (0S03666) | HGST | Deskstar NAS | NAS | SATA 6Gb/s (SATA III) | 4 TB |
| H3IKNAS40003272SE (0S03665) | HGST | Deskstar NAS | NAS | SATA 6Gb/s (SATA III) | 4 TB |
| H3IKNAS40003272SE2PK (0S03903) | HGST | NAS | NAS | SATA 6Gb/s (SATA III) | 4 TB |
| H3IKNAS40003272SE4PK (0S03678) | HGST | NAS | NAS | SATA 6Gb/s (SATA III) | 4 TB |
| H3IKNAS40003272SJ (0S03667) | HGST | Deskstar NAS | NAS | SATA 6Gb/s (SATA III) | 4 TB |
| H3IKNAS40003272SN (0S03664) | HGST | Deskstar NAS | NAS | SATA 6Gb/s (SATA III) | 4 TB |
| H3IKNAS40003272SN4PK (0S03677) | HGST | NAS | NAS | SATA 6Gb/s (SATA III) | 4 TB |
| H3IKNAS40003272SP2PK (0S03902) | HGST | NAS | NAS | SATA 6Gb/s (SATA III) | 4 TB |
| HDN724040ALE640 | HGST | NAS | NAS | SATA 6Gb/s (SATA III) | 4 TB |
| HDS724040ALE640 (H3IK40003272SW) | Hitachi | Consumer | Other | SATA 6Gb/s (SATA III) | 4 TB |
| HMS5C4040BLE640 (MegaScale DC 4000.B) | HGST | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| HUS724040ALA640 (Ultrastar 7K4000) | HGST | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| HUS724040ALE640 (MJAOA3B0) | HGST | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| MC04ACA400E | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| MG03ACA400 | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| MG04ACA400E | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| ST4000NC000 (Terascale HDD) | Seagate | Terascale | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| ST4000NC001 (Terascale HDD) | Seagate | Terascale | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| ST4000NM0033 (Enterprise Capacity 3.5 HDD) | Seagate | Seagate® Constellation® | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| ST4000VM000 | Seagate | Consumer Video | Other | SATA 6Gb/s (SATA III) | 4 TB |
| WD4000F9YZ (Se) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| WD4000FYYZ (WD Re) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| WD4001FAEX | Western Digital | Consumer | Other | SATA 6Gb/s (SATA III) | 4 TB |
| WD4001FFSX (Red Pro NASware 3.0) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 4 TB |
| DT01ACA300 | Toshiba | Consumer DT01 | Other | SATA 6Gb/s (SATA III) | 3 TB |
| H3IKNAS30003272SA (0S03662) | HGST | Deskstar NAS | NAS | SATA 6Gb/s (SATA III) | 3 TB |
| H3IKNAS30003272SE (0S03661) | HGST | Deskstar NAS | NAS | SATA 6Gb/s (SATA III) | 3 TB |
| H3IKNAS30003272SE2PK (0S03899) | HGST | NAS | NAS | SATA 6Gb/s (SATA III) | 3 TB |
| H3IKNAS30003272SE4PK (0S03674) | HGST | NAS | NAS | SATA 6Gb/s (SATA III) | 3 TB |
| H3IKNAS30003272SJ (0S03663) | HGST | Deskstar NAS | NAS | SATA 6Gb/s (SATA III) | 3 TB |
| H3IKNAS30003272SN (0S03660) | HGST | Deskstar NAS | NAS | SATA 6Gb/s (SATA III) | 3 TB |
| H3IKNAS30003272SN4PK (0S03673) | HGST | NAS | NAS | SATA 6Gb/s (SATA III) | 3 TB |
| H3IKNAS30003272SP2PK (0S03898) | HGST | NAS | NAS | SATA 6Gb/s (SATA III) | 3 TB |
| HDN724030ALE640 | HGST | NAS | NAS | SATA 6Gb/s (SATA III) | 3 TB |
| HDS5C3030ALA630 | Hitachi | Consumer | Other | SATA 6Gb/s (SATA III) | 3 TB |
| HDS723030ALA640 | Hitachi | Consumer | Other | SATA 6Gb/s (SATA III) | 3 TB |
| HUA723030ALA640 | HGST | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| HUS724030ALA640 (Ultrastar 7K4000) | HGST | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| HUS724030ALE640 | HGST | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| MC04ACA300E | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| MG03ACA300 | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| MG04ACA300E | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| ST3000NC000 (Terascale HDD) | Seagate | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| ST3000NC002 (Terascale HDD) | Seagate | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| ST3000NM0033 (Constellation ES.3) | Seagate | Seagate® Constellation® | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| ST3000VM002 | Seagate | Consumer | Other | SATA 6Gb/s (SATA III) | 3 TB |
| ST3000VX000 | Seagate | Surveillance | Surveillance | SATA 6Gb/s (SATA III) | 3 TB |
| ST33000650NS | Seagate | CONSTELLATION ES | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| ST33000651AS | Seagate | Consumer | Other | SATA 6Gb/s (SATA III) | 3 TB |
| WD3000F9YZ (Se) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| WD3000FYYZ (WD Re) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| WD3001FFSX (Red Pro NASware 3.0) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 3 TB |
| DT01ACA200 (HDS723020BLE640) | Toshiba | Consumer DT01 | Other | SATA 6Gb/s (SATA III) | 2 TB |
| HD203WI | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 2 TB |
| HD204UI | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 2 TB |
| HDS5C3020ALA632 | Hitachi | Consumer | Other | SATA 6Gb/s (SATA III) | 2 TB |
| HDS722020ALA330 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 2 TB |
| HDS723020BLA642 | Hitachi | Consumer | Other | SATA 6Gb/s (SATA III) | 2 TB |
| HUA722020ALA330 | HIKVISION | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 2 TB |
| HUA723020ALA640 | HGST | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| HUS724020ALA640 (Ultrastar 7K4000) | HGST | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| HUS724020ALE640 | HGST | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| MC04ACA200E | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| MG03ACA200 | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| MG04ACA200E | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| MK2002TSKB (MT2A) | Toshiba | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 2 TB |
| ST2000NC000 (Terascale HDD) | Seagate | Surveillance | Surveillance | SATA 6Gb/s (SATA III) | 2 TB |
| ST2000NC001 (Terascale HDD) | Seagate | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| ST2000NM0011 | Seagate | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| ST2000NM0033 (Constellation ES.3) | Seagate | Seagate® Constellation® | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| ST2000VM003 | Seagate | Consumer Pipeline | Other | SATA 6Gb/s (SATA III) | 2 TB |
| ST2000VX000 | Seagate | Surveillance SV35.6 Series™ | Surveillance | SATA 6Gb/s (SATA III) | 2 TB |
| ST32000542AS | Seagate | Consumer | Other | SATA 3Gb/s (SATA II) | 2 TB |
| ST32000641AS | Seagate | Consumer | Other | SATA 6Gb/s (SATA III) | 2 TB |
| ST32000644NS | Seagate | CONSTELLATION ES | Enterprise | SATA 3Gb/s (SATA II) | 2 TB |
| ST32000645NS | Seagate | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| WD2000F9YZ (Se) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| WD2000FYYZ (WD Re) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| WD2001FASS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 2 TB |
| WD2001FFSX (Red Pro NASware 3.0) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 2 TB |
| WD2002FAEX | Western Digital | Consumer | Other | SATA 6Gb/s (SATA III) | 2 TB |
| WD2002FYPS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 2 TB |
| WD2003FYYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 2 TB |
| HD154UI | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 1.5 TB |
| HDS723015BLA642 | Hitachi | Consumer | Other | SATA 6Gb/s (SATA III) | 1.5 TB |
| ST1500DL003 | Seagate | Consumer | Other | SATA 6Gb/s (SATA III) | 1.5 TB |
| ST31500341AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 1.5 TB |
| ST31500541AS | Seagate | Consumer | Other | SATA 3Gb/s (SATA II) | 1.5 TB |
| DT01ACA100 | Toshiba | Consumer DT01 | Other | SATA 6Gb/s (SATA III) | 1 TB |
| HD103SI | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HD103SJ | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HD103UI | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HD103UJ | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HDE721010SLA330 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HDS721010CLA332 | HGST | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HDS721010KLA330 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HDT721010SLA360 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HE103UJ | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| MG03ACA100 | Toshiba | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 1 TB |
| MK1002TSKB (MT2A) | Toshiba | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 1 TB |
| ST1000NC000 (Terascale HDD) | Seagate | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 1 TB |
| ST1000NC001 (Terascale HDD) | Seagate | Terascale | Enterprise | SATA 6Gb/s (SATA III) | 1 TB |
| ST1000NM0011 | Seagate | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 1 TB |
| ST1000NM0033 (Constellation ES.3) | Seagate | Seagate® Constellation® | Enterprise | SATA 6Gb/s (SATA III) | 1 TB |
| ST1000VM002 | Seagate | Consumer Pipeline | Other | SATA 6Gb/s (SATA III) | 1 TB |
| ST1000VX000 | Seagate | Surveillance SV35.6 Series™ | Surveillance | SATA 6Gb/s (SATA III) | 1 TB |
| ST31000333AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 1 TB |
| ST31000340AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 1 TB |
| ST31000340NS | Seagate | Surveillance | Enterprise | SATA 3Gb/s (SATA II) | 1 TB |
| ST31000520AS | Seagate | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| ST31000524AS | Seagate | Consumer | Other | SATA 6Gb/s (SATA III) | 1 TB |
| ST31000524NS | Seagate | CONSTELLATION ES | Enterprise | SATA 3Gb/s (SATA II) | 1 TB |
| ST31000528AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 1 TB |
| WD1000DHTZ | Western Digital | Consumer | Other | SATA 6Gb/s (SATA III) (10000RPM) | 1 TB |
| WD1001FALS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| WD1002F9YZ (Se) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 1 TB |
| WD1002FAEX | Western Digital | Consumer | Other | SATA 6Gb/s (SATA III) | 1 TB |
| WD1002FBYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 1 TB |
| WD1003FBYX | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 1 TB |
| WD1003FBYZ | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 1 TB |
| WD10EACS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| WD10EALS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| WD10EALX | Western Digital | Consumer | Other | SATA 6Gb/s (SATA III) | 1 TB |
| WD10EVCS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HD753LJ | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| HDE721075SLA330 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| HDS721075KLA330 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| HDT721075SLA360 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| ST3750330AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 750 GB |
| ST3750330NS | Seagate | Surveillance | Enterprise | SATA 3Gb/s (SATA II) | 750 GB |
| ST3750528AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 750 GB |
| ST3750630AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 750 GB |
| WD7500AACS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| WD7500AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| WD7500AALX | Western Digital | Consumer | Other | SATA 6Gb/s (SATA III) | 750 GB |
| WD7500AVCS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| WD7501AALS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| HD642JJ | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 640 GB |
| ST3640323AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 640 GB |
| WD6400AACS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 640 GB |
| WD6400AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 640 GB |
| WD6401AALS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 640 GB |
| WD6402AAEX | Western Digital | Consumer | Other | SATA 6Gb/s (SATA III) | 640 GB |
| HD502HI | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| HD502lJ | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| HDS721050CLA662 | HGST | Consumer | Other | SATA 6Gb/s (SATA III) | 500 GB |
| ST3500320AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 500 GB |
| ST3500320NS | Seagate | Surveillance | Enterprise | SATA 3Gb/s (SATA II) | 500 GB |
| ST3500413AS | Seagate | Consumer | Other | SATA 6Gb/s (SATA III) | 500 GB |
| ST3500418AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 500 GB |
| ST3500514NS | Seagate | CONSTELLATION ES | Enterprise | SATA 3Gb/s (SATA II) | 500 GB |
| ST3500620AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 500 GB |
| ST500DM002 | Seagate | BarraCuda | Enterprise | SATA 6Gb/s (SATA III) | 500 GB |
| ST500NM0011 | Seagate | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 500 GB |
| WD5000AACS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| WD5000AAJS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| WD5000AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| WD5000AAKX | Western Digital | Consumer | Other | SATA 6Gb/s (SATA III) | 500 GB |
| WD5000AVVS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| WD5000HHTZ (VelociRaptor) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) (10000RPM) | 500 GB |
| WD5001AALS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| WD5003ABYX | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 500 GB |
| WD5003ABYZ | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) | 500 GB |
| WD4500HLHX | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) (10000RPM) | 450 GB |
| WD4000AAJS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 400 GB |
| WD4000AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 400 GB |
| ST3320418AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 320 GB |
| ST3320613AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 320 GB |
| WD3200AAJS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 320 GB |
| WD3200AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 320 GB |
| WD3000HLHX | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) (10000RPM) | 300 GB |
| ST32500310NS | Seagate | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 250 GB |
| ST3250318AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 250 GB |
| WD2500AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 250 GB |
| WD2500HHTZ (VelociRaptor) | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) (10000RPM) | 250 GB |
| ST3160318AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 160 GB |
| ST3160813AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 160 GB |
| WD1500HLHX | Western Digital | Enterprise | Enterprise | SATA 6Gb/s (SATA III) (10000RPM) | 150 GB |
Security: QNAP security: DeadBolt history & lockdown — eCh0raix → Qlocker → DeadBolt — what changed.