Each drive bay can hold one 3.5-inch SATA 1.5Gb/s, SATA 3Gb/s and SATA 6Gb/s hard drive of maximum 4TB capacity.

Enterprise Drives:

SATA III (6 Gb/s)
Manufacturer Model Number Size Notes
WD WD4000F9YZ 4TB
WD3000F9YZ 3TB  
WD2000F9YZ 2TB  
WD4000FYYZ 4TB  
WD3000FYYZ 3TB Note1
WD2000FYYZ 2TB
WD4500HLHX 450 GB Note1
WD3000HLHX 300 GB Note1
WD1500HLHX 150 GB Note1
Hitachi HUS724040ALE640 (MJAOA3B0) 4 TB Note8
HUS724040ALA640 4 TB  
HUS724030ALE640 3 TB Note8
HUS724030ALA640 3 TB  
HUS724020ALE640 2 TB Note8
HUS724020ALA640 2 TB  
HUA723030ALA640 3 TB Note8
HUA723020ALA640 2 TB Note1
Seagate ST4000NM0033 (Constellation ES.3) 4 TB  
ST3000NM0033 (Constellation ES.3) 3 TB Note1
ST2000NM0033 (Constellation ES.3) 2 TB Note1
ST1000NM0033 (Constellation ES.3) 1 TB Note1
ST3000NC000/ST3000NC002 (Constellation CS) 3 TB Note1
ST33000650NS 3 TB Note8
ST32000645NS 2 TB Note1
ST2000NM0011 2 TB  
ST2000NC000 2 TB Note1
ST1000NC000 1 TB Note1
ST1000NM0011 1 TB Note1
ST500NM0011 500 GB  
Toshiba MG03ACA300 3 TB  
MG03ACA200 2 TB  
MG03ACA100 1 TB  

SATA I/ SATA II (3Gb/s)
Manufacturer Model Number Size Notes
WD WD1003FBYX 1 TB Note10
WD1503FYYS 1.5 TB  
WD2002FYPS 2 TB  
WD2003FYYS 2 TB  
WD5003ABYX 500 GB  
Toshiba MK2002TSKB(F/W: MT2A) 2 TB Note12
MK1002TSKB(F/W: MT2A) 1 TB Note12
Seagate ST35000514NS 500 GB  
ST31000524NS 1 TB  
ST32000644NS 2 TB  
Hitachi HUA722020ALA330 2 TB  

Desktop Drives:

SATA III (6Gb/s)
Manufacturer Model Number Size Notes
Hitachi HDS724040ALE640 (H31K40003272SW) 4 TB Note8
HDS5C3030ALA630 3 TB Note8
HDS721050CLA662 500GB 7200 RPM
HDS723015BLA642 1.5 TB  
HDS723020BLA642 2 TB  
HDS5C3020ALA632 2 TB  
HDS723030ALA640 3 TB Note8
Seagate ST33000651AS 3 TB Note8
ST32000641AS 2 TB  
ST31000524AS 1 TB  
ST3750525AS 750 GB  
ST3500413AS 500 GB
ST1000VX000 1 TB Note1
ST2000VX000 2 TB Note1
ST3000VX000 3 TB Note12
ST500DM002 500GB Note12
Toshiba DT01ACA200 (HDS723020BLE640) 2 TB  
DT01ACA300 3TB  
DT01ACA200 2TB  
DT01ACA100 1TB Note12
WD WD1000DHTZ 1 TB  
WD10EFRX 1000 GB  
WD20EFRX 2000 GB  
WD30EFRX 3000 GB  

Not Recommended Hard Drives

Manufacturer Model Number Size (GB) Remark
Seagate  ST4000DM000 4000 Note13
Seagate  ST3000DM001 3000 Note13
Seagate  ST2000DM001 2000 Note13
Seagate  ST1500DM003 1500 Note13
Seagate  ST1000DM003 1000 Note13
Seagate  ST750DM003 750 Note13

Unofficial 3.5" HDD Compatibility List

Note1
As suggested by certain hard disk drive providers, the hard disk drives of the same brand and series are collectively recognized as compatible with QNAP products if the largest-capacity drive has passed the compatibility test.

Note2 (WD RE4-GP WD2002FYPS)
For improved stability, you are suggested to contact Western Digital after Nov 15, 2009 for the new firmware upgrade. Please refer to http://files.qnap.com/download/Forum/WD_New_Firmware_Release.pdf

Note3 (WD Caviar Green & Seagate Green)
These hard disk drives have passed QNAP lab's initial verification of compatibility. However, because many users have reported unstable experience with these hard disk drives, we do not recommend using these had disk drives with QNAP products. WD10EADS-00P8B0 and WD15EADS-00P8B0 are not suggested because of slow performance and stability issues.

Note4 (Advanced Format)
Currently these hard disk drives are not compatible with QNAP NVR.

Note5 (Hitachi 7K1000.C HDS721010CLA332 1TB)
Since the design of the screw position of this hard disk drive model is slightly different from others, the hard disk drives of 2-bay and 4-bay VioStor NVR may not be detected properly. Please plug the hard disk drive tray into the drive bay until it clicks into place to avoid hard disk drive detection error.

Note6 (WD Desktop Hard Drives)
The hard disk drives have passed QNAP lab's initial verification of compatibility.
However, the manufacturer has suggested not to use the desktop hard disk drives in business-critical RAID environments because the drives may not work correctly. Please check this link for more information.

Note7 (Samsung HD204UI 2TB)
To use this hard disk model with QNAP products, please back up the disk data (if any) and follow the guide below to apply the patch for improved data integrity. http://www.samsung.com/global/business/hdd/faqView.do?b2b_bbs_msg_id=386

Note8 (3TB HDD)
QNAP NVR supports a disk volume of larger than 16TB. To use these models with QNAP NVR, please upgrade the NVR firmware to v3.5.1 or later. A disk volume of less than 16TB of storage can only be expanded to maximum 16TB by online RAID capacity expansion or adding hard drives. Online RAID capacity expansion and adding hard drives are not supported for a disk volume of over 16TB.

Note9
Please update the NVR firmware to V3.5.2 or above for enhanced compatibility with this hard drive model.

Note10
If a HDD SMART test is performed on a drive concurrently with data access, the drive might be ejected from the RAID volume. We will solve this issue asap.

Note11
The series of hard drives passed the compatibility testing in our lab. However, the hard drive itself presents 5%+ failure rate in our large-scale aging testing. (out of 200 hard drives).

Note12
Please update the NVR firmware to V3.6.0 or above for enhanced compatibility with this hard drive model.

Note 13
This hard drive series initially passed our lab compatibility test and was included in the recommended HDD list. However, during the last few months, we have received an overwhelming number of support requests regarding this hard drive series. The high failure rate of this hard drives series has raised concerns over risks of data loss. Therefore, we have no choice but to remove this series from the recommended HDD list. For users who have already installed this series of HDD on their NVR, QNAP will continue to provide technical supports as requested.