NVR / Recorders › NVR824-128R / 256R
Uniview (UNV)NVR824-R Series · 24× SATA HDD
24-HDD Network Video Recorder · R Series
NVR824-128R / 256R
128 / 256-channel network video recorder — 24 hot-swap SATA bays with RAID 0/1/5/6/10/50/60, two independent 4K HDMI outputs plus VGA, records cameras up to 12MP, with 768 Mbps incoming bandwidth and an optional redundant power supply.
12MP · max recordingUltra 265 · low storage2× HDMI 4K · + VGA independent24× SATA · up to 24 TB eachRAID 0/1/5/6/10/50/60 · hot-swap redundancy38 languages · local interface
Choose your size — two models on this page
Rule of thumb: count your cameras across the whole deployment, then leave room to grow — 128 channels covers a large single site; step up to the 256R for a multi-building campus or a central monitoring room aggregating several sites. Highlighted rows in the spec table below show every difference between the two.
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How many terabytes for your channels and days? Use the storage calculator →
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The Uniview NVR824-R Series is a 24-HDD rack-mount network video recorder offered in two sizes: NVR824-128R (128-ch) and NVR824-256R (256-ch). Both record cameras up to 12MP with Ultra 265 / H.265 / H.264 compression, output independently over two HDMI ports (each up to 4K) plus one VGA port, and support hot-swappable SATA bays with RAID 0/1/5/6/10/50/60 and an optional second power supply for redundancy. Each of the 24 SATA bays takes a hard disk up to 24 TB, two miniSAS ports allow expansion to an external disk enclosure, and the local interface is available in 38 languages including Spanish (Latin America), Portuguese (Brazil) and French.
Is this the right recorder for you?
Plain-language guide for buyers and installers — based only on what this recorder actually does.
Large campuses & enterprise sites128 or 256 channels in one recorder covers a major site or aggregates several buildings without stacking multiple recorders.
Storage that can't afford to fail24 hot-swap SATA bays with RAID 0/1/5/6/10/50/60 and N+1 hot spare protect footage — a failed disk swaps out live, without taking the recorder offline.
Long-term evidence at scale24 bays up to 24 TB each (up to 576 TB total), plus two miniSAS ports to add an external disk enclosure when you outgrow the internal bays.
Video walls & control roomsTwo independent HDMI outputs (4K each) plus VGA, and optional 4-ch/7-ch HDMI decoding cards in the four rear extension slots, drive multiple large-format displays from one unit.
Redundant power for critical sitesAn optional second power supply (PWR-DC12-550A-IN, 550W) keeps recording through a single PSU failure — order it alongside the recorder for sites that can't go dark.
City-scale vehicle & face searchVCA Search covers face snapshot, face comparison, motor and non-motor vehicle, human body and general search, plus a vehicle picture library for up to 25,000 vehicle images across 5 libraries.
Not the right pick if you need…
- A compact desktop unit — this is a large rack-mount chassis (484.6 × 533 × 175.5mm, about 12.5kg without HDDs), not a desktop recorder
- Built-in PoE ports — cameras need a separate PoE switch
- A second power supply included as standard — the redundant PSU (PWR-DC12-550A-IN) is an optional add-on, not included
- A small deployment — this series starts at 128 channels; a lower-channel Uniview NVR fits smaller sites better
- Full per-channel NVR-side smart analytics specs in this document — the detailed Smart-by-NVR feature and channel-count breakdown is published in a separate Smart Card datasheet, not in this general specification
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Key Features
Complete list from the official datasheet.
Support Ultra 265 / H.265 / H.264 video formats
128/256-channel input
Support 2-ch HDMI, 1-ch VGA, HDMI at up to 4K (3840×2160) resolution
HDMI1, HDMI2 and VGA independent outputs provided
Up to 12 Megapixels resolution recording
Redundant power supply optional
Support HDD hot swap with RAID 0, 1, 5, 6, 10, 50, 60 storage scheme configurable
Support 2 miniSAS Interfaces
Support 12V power output
ANR technology to enhance the storage reliability when the network is disconnected
Support cloud upgrade
Support N+1 Hot spare
Twenty-four bays. Seven RAID levels. Zero downtime.
Two real capabilities from the datasheet that matter most on large, mission-critical sites: hot-swap storage redundancy and city-scale smart search.
HOT-SWAP STORAGE
24 bays, seven RAID levels, one live swap
24 hot-swap SATA bays with RAID 0/1/5/6/10/50/60 and N+1 hot spare — replace a failed disk without powering down, and expand further with two miniSAS ports to an external disk enclosure.
SMART SEARCH AT SCALE
Find one face or one vehicle across 256 channels
VCA Search indexes face snapshots, face comparisons, motor and non-motor vehicles, human bodies and general search — combined with a vehicle picture library holding up to 25,000 images across 5 libraries, so investigators jump straight to the match instead of scrubbing footage channel by channel.
Which size fits your project?
Bars show camera capacity per model. Click the model buttons above to switch — the spec table highlights every other difference.
NVR824-128Rsync playback 16-ch
128cameras
NVR824-256Rsync playback 16-ch
256cameras
Who uses it, where it goes and how to size it
Written for the NVR824-128R and NVR824-256R from the official datasheet: 128 or 256 IP channels, 768 Mbps incoming, 24 hot-swap SATA bays up to 24 TB each with RAID 0/1/5/6/10/50/60 and N+1 hot spare, two independent 4K HDMI outputs plus VGA, 4 extension board slots, optional redundant power supply.
Who it is for
- Integrators of large sites and campuses — 128 or 256 cameras on one recorder with 768 Mbps of intake, so a factory, port, campus or multi-building site runs on one box instead of a stack of small NVRs.
- Projects that need long retention — 24 bays take disks up to 24 TB each (576 TB raw), and the 2 miniSAS ports add a DEU1016-B 16-disk enclosure, for sites that must keep 60–90 days or more.
- Sites that cannot lose footage — Banks, transport and public buildings: RAID 6 or 60 with an N+1 hot spare, hot-swap disks, Array Degraded / Array Damaged alarms and an optional second power supply (PWR-DC12-550A-IN).
- Control rooms with Uniview smart cameras — Two independent 4K HDMI outputs plus VGA, 128 remote users, and VCA search on face, vehicle and human-body records sent by smart cameras (up to 5 million face and 5 million vehicle snapshot records).
Where and how to install
- 19-inch rack on rails — The chassis is 484.6 × 533 × 175.5 mm and weighs up to 12.5 kg before 24 disks go in. Mount it on the SL-A slide rail, check the rack is deep enough for 533 mm plus rear cables, and leave room in front to pull disks.
- Keep the room at or below 40 °C — The recorder itself works from -10 °C to 50 °C, but the datasheet says that for the largest disks the room should not exceed 40 °C, and 24 spinning disks make real heat. Use an air-conditioned equipment room, keep front and rear airflow open and never close it in an unventilated cabinet.
- Power: UPS and the second supply — Input is AC 100–240 V and the recorder itself draws up to 70 W, but 24 disks add far more than that, so size the UPS on the full load with disks. With the optional PWR-DC12-550A-IN fitted, feed the two supplies from different circuits or UPS units.
- Network design for 768 Mbps — There are 4 gigabit RJ45 ports, and 768 Mbps of camera traffic is most of one gigabit link. Bring each building in through a core switch with gigabit or faster uplinks rather than a chain of small PoE switches, and keep the camera network apart from the office network. There is no built-in PoE.
- Disks and RAID before cameras — Fit disks of one size, build the array (RAID 6 or 60 is usual with 24 large disks) and set a hot spare before adding cameras, because building an array formats the disks. Label each bay so the right disk is pulled when the Disk Abnormal or Array Degraded alarm comes.
- Alarms, serial ports and expansion — Wire the 24 alarm inputs and 8 outputs to panels, door contacts or sirens; RS485 and RS232 are on the rear. The 4 extension board slots take the FB-HD04-B-NB / FB-HD07-B-NB HDMI decoding cards, and the 2 miniSAS ports the DEU1016-B enclosure.
Planning table: channels, bandwidth, disks and retention
The two models are the same box: same 768 Mbps intake, 24 bays up to 24 TB, RAID levels, decoding and outputs. Only the channel count differs. Because the intake is shared, the 256R leaves on average 3 Mbps per camera when every channel is used, half the 6 Mbps of the 128R, so the 256R suits many 2 MP cameras and the 128R suits 4–8 MP cameras.
| NVR824-128R | NVR824-256R | |
|---|---|---|
| IP camera channels | 128 | 256 |
| Incoming / outgoing bandwidth | 768 / 768 Mbps | 768 / 768 Mbps |
| Average per camera, all channels used | 6 Mbps | 3 Mbps |
| Hard disks (hot swap) | 24 × SATA, ≤ 24 TB each (576 TB) | 24 × SATA, ≤ 24 TB each (576 TB) |
| RAID levels | 0, 1, 5, 6, 10, 50, 60 + N+1 hot spare | 0, 1, 5, 6, 10, 50, 60 + N+1 hot spare |
| Usable on 24 × 24 TB: RAID 5 / RAID 6 / RAID 6 + 1 hot spare | 552 / 528 / 504 TB | 552 / 528 / 504 TB |
| Days in RAID 6 + 1 hot spare (504 TB), all channels at 4 Mbps | 91.1 | — (256 × 4 = 1024 Mbps > 768) |
| Days in RAID 6 + 1 hot spare (504 TB), all channels at 2 Mbps | 182.3 | 91.1 |
| Decoding for local display (any one of) | 3 × 12MP@30 / 5 × 4K@30 / 20 × 1080P@30 | 3 × 12MP@30 / 5 × 4K@30 / 20 × 1080P@30 |
| Video outputs (largest split) | 2 × HDMI 4K (64) + VGA (36), independent | 2 × HDMI 4K (64) + VGA (36), independent |
| Smart by IPC / snapshot records | All ch, ≤ 64 images/s; 5M face, 5M vehicle, 2M SIP | All ch, ≤ 64 images/s; 5M face, 5M vehicle, 2M SIP |
| Network / extension | 4 × RJ45 1000 Mbps; 4 extension slots; 2 × miniSAS; 1 × eSATA | 4 × RJ45 1000 Mbps; 4 extension slots; 2 × miniSAS; 1 × eSATA |
| Power (without HDD) | AC 100–240 V, ≤ 70 W; redundant PSU optional | AC 100–240 V, ≤ 70 W; redundant PSU optional |
- Pick the 128R for up to 128 cameras of 4–8 MP: each can use 6 Mbps, and 4 Mbps per camera gives about 91.1 days in RAID 6 with a hot spare on 24 × 24 TB.
- Pick the 256R for 129–256 cameras at about 3 Mbps or less each (typically 2 MP); at 2 Mbps the same disks hold about 91.1 days.
- 256 cameras at 4 Mbps each would need 1024 Mbps, more than the 768 Mbps intake: split them over two recorders.
Retention assumes continuous 24-hour recording: days = TB × 10^12 ÷ (cameras × Mbps × 10^6 ÷ 8 × 86400). 4 Mbps is a typical H.265 main stream for 4 MP and 2 Mbps for 2 MP; Ultra 265, lower frame rates or event recording give more days. Usable space: RAID 5 = 23 data disks, RAID 6 = 22, RAID 6 + 1 hot spare = 21 (× 24 TB). The datasheet says the room should not exceed 40 °C for the largest disks.
Full Specifications
Complete official specifications from the manufacturer's datasheet (technical values in English).
Highlighted rows differ between the two models:NVR824-128R · 128-chNVR824-256R · 256-ch
Decoding
| Decoding Format | Ultra 265, H.265, H.264 |
| Decoding Capability | 3 x 12MP@30, 5 x 4K@30, 20 x 1080P@30, 24 x 1080P@25, 40 x 960P@25, 45 x 720P@30, 54 x 720P@25, 96 x D1 |
| Decoding Capability Description | The resolution of each channel cannot exceed 4096 pixels in length or width. For VGA/HDMI independent output, the VGA live video is output by default. To output the highest resolution video from the HDMI port, please clear the VGA video on the preview page. |
| Audio Compression | G.711A, G.711U |
Network
| Incoming Bandwidth | 768 Mbps |
| Outgoing Bandwidth | 768 Mbps |
| Remote Users | 128 |
| Protocols | TCP/IP, P2P, UPnP, NTP, DHCP, PPPoE, HTTP, HTTPS, DNS, DDNS, SNMP, SMTP, NFS, RTSP, 802.1x, IPv6, IPv4 |
| Browser (Plugin) | IE10, IE11, Chrome 45+, Edge 79+, Firefox 52+ |
Video/Audio Input
| IP Video Input | 128R · 128-ch256R · 256-ch |
| RCA Audio Input | 1-ch |
Video/Audio Output
| HDMI Output | 4K (3840 × 2160)/30 Hz, 1920 × 1080/60 Hz, 1920 × 1080/50 Hz, 1600 × 1200/60 Hz, 1280 × 1024/60 Hz, 1280 × 720/60 Hz, 1024 × 768/60 Hz |
| VGA Output | 1920 × 1080/60 Hz, 1920 × 1080/50 Hz, 1600 × 1200/60 Hz, 1280 × 1024/60 Hz, 1280 × 720/60 Hz, 1024 × 768/60 Hz |
| RCA Audio Output | 1-ch |
| Liveview Display | VGA: 1/4/6/8/9/16/25/36, HDMI1/HDMI2: 1/4/6/8/9/16/25/36/64 |
| Corridor Mode Screen | 3/4/5/7/9/10/12/16/32 |
Two-way Audio
| Two-way Audio | 1-ch, RCA (using the audio input and output) |
Snapshot
| FTP/Schedule/Event Snapshot | Full-ch snapshot (max. 4000 × 3000 video resolution, with snapshot resolution same as the video resolution) |
Recording
| Recording Resolution | 12 MP/8 MP/6 MP/5 MP/4 MP/3 MP/1080P/960P/720P/D1/2CIF/CIF |
| Synchronous Playback in Local | 16-ch |
Smart
| Smart by IPC | All channels (up to 64 images/s in total) Face Detection, Face Comparison, Vehicle Detection (LPR), Temperature Detection, SIP, UMD, Video Metadata, Traffic Monitoring |
| Smart by NVR | In the Smart Card datasheet |
| VCA Search | Face Snapshot Search, Face Comparison Search, Motor Vehicle Search, Non-Motor Vehicle Search, Human Body Search, General Search, People Counting Report |
| by NVR | In the Smart Card datasheet |
| Vehicle Picture Library | Up to 5 vehicle picture libraries, with up to 25,000 vehicle pictures in total |
| SIP by NVR with normal cameras | In the Smart Card datasheet |
| Capacity of Snapshot Records | 5 millions records for face snapshot, 5 millions records for vehicle snapshot, 2 millions records for SIP |
Alarm
| General Alarm | Defocus Detection, Scene Change Detection, Object Left Behind, Object Removed, Auto Tracking, Motion Detection, Tampering, Human Body Detection, Video Loss, Alarm Input, Audio Detection |
| Alert Alarm | IP Conflict, Network Disconnected, Disk Offline, Disk Abnormal, Illegal Access, Hard Disk Space Low, Hard Disk Full, Recording/Snapshot Abnormal, High CPU Temperature, High Motherboard Temperature, Array Damaged, Array Degraded |
GUI Language
| GUI Language | 38 languages: Simplified Chinese, Traditional Chinese, English, Vietnamese, Thai, Turkish, Spanish (Latin America), Portuguese (Brazil), Spanish, Portuguese, French, German, Italian, Dutch, Polish, Czech, Hungarian, Slovak, Russian, Hebrew, Arabic, Ukrainian, Estonian, Bulgarian, Greek, Romanian, Danish, Swedish, Norwegian, Finnish, Croatian, Slovenia, Serbia, Korean, Japanese, Latvian, Lithuanian, Persian |
Hard Disk
| SATA | 24 SATA interfaces |
| Capacity | Up to 24 TB for each HDD (the maximum HDD capacity varies with environment temperature and hard disk size, the environment temperature for use should not exceed 40°C) |
| Disk Array Type | RAID 0, 1, 5, 6, 10, 50, 60 |
| Hot Swap | Support |
External Interface
| Network Interface | 4 RJ45 10 M/100 M/1000 M self-adaptive Ethernet Interface |
| USB | Front panel: 2 × USB2.0, Rear panel: 2 × USB3.0 |
| RS485 | 1 |
| RS232 | 1 |
| Alarm In | 24-ch |
| Alarm Out | 8-ch |
| eSATA | 1 |
| miniSAS | 2 |
| Extension Board | 4 |
| Power Output | 12 V |
| Power Supply | AC 100 to 240 V |
| Power Switch | Support |
| Redundant Power Supply | Support |
Working Environment
| Working Temperature | -10 °C to 50 °C (14 °F to 122 °F) |
| Working Humidity | ≤ 90% RH (non-condensing) |
| Power Consumption (without HDD) | ≤ 70 W |
Dimensions
| Weight (without HDD) | ≤ 12.5 kg (27.56 lb) |
| Dimensions | 484.6 mm × 533 mm × 175.5 mm (19.1" × 21.0" × 6.9") |
Certification
| Certification | CE; FCC; UL; RoHS; WEEE |
| CE | EN 55032, EN 61000-3-3, EN IEC 61000-3-2, EN 55035 |
| FCC | Part15 Subpart B |
Dimensions
Engineering drawing reproduced 1:1 from the official datasheet.
unit: mm (in.)
| Dimensions | 484.6 × 533 × 175.5 mm (19.1" × 21.0" × 6.9") |
| Weight (without HDD) | ≤ 12.5 kg (27.56 lb) |
| Power supply | AC 100 to 240 V |
| Consumption (without HDD) | ≤ 70 W |
Rear panel — all interfaces
Optional Accessories
Order together with the recorder to save shipping.
FB-HD04-B-NB4-ch HDMI output decoding card
FB-HD07-B-NB7-ch HDMI output decoding card
DEU1016-B16-HDD 3U disk enclosure
SL-ASlide rail
PWR-DC12-550A-IN550W redundant power supply module
128/256-Channel 24-Bay NVR FAQ — NVR824-R Series
How much storage fits in the 24 bays?
Each of the 24 hot-swap SATA bays takes up to 24 TB — 576 TB inside one recorder — protected by RAID 0, 1, 5, 6, 10, 50 or 60 with an N+1 hot spare. Two miniSAS ports, one eSATA and four extension boards allow growth beyond the chassis.
What camera bitrate can I plan across 256 channels?
Incoming bandwidth is 768 Mbps — an average of 3 Mbps per camera fully loaded on the 256-channel model, or 6 Mbps on the 128-channel version. Outgoing bandwidth is equally 768 Mbps for remote clients, and recording resolution goes up to 12 MP per channel.
Does it keep face and vehicle records for later search?
Yes — the database holds 5 million face snapshot records, 5 million vehicle records and 2 million SIP records. Cameras supply Face Detection, Face Comparison, Vehicle Detection (LPR) and Temperature Detection on all channels at up to 64 images per second, searchable by face, vehicle or human body.
What monitors and layouts does it support?
HDMI1/HDMI2 output up to 4K (3840 × 2160) at 30 Hz with live view splits to 64 windows; VGA reaches 1080p60 with up to 36 windows. Corridor mode handles vertical scenes, 16 channels play back synchronously on site, and two-way audio runs over the RCA pair.
Is it built for 24/7 operation with unstable mains?
It runs on AC 100–240 V, supports an optional redundant power supply and uses hot-swap drive bays — so both a PSU and a disk can be changed without stopping recording. Four gigabit RJ45 interfaces, RS485/RS232 and 24 alarm inputs with 8 outputs handle site integration.
Should I use RAID 5 or RAID 6 on the NVR824-128R / 256R with 24 TB disks, and how does the hot spare help?
RAID 6 (or RAID 60) is the safer choice: it survives two failed disks in the array, RAID 5 only one, and rebuilding a 24 TB disk can take a day or more, a long window for a second failure. With 24 × 24 TB, RAID 6 gives 528 TB usable versus 552 TB in RAID 5, so the extra protection costs one disk. Keep one more disk as an N+1 hot spare (504 TB usable): the recorder starts rebuilding onto it by itself, and you replace the failed disk later with hot swap, without powering down.
Can the NVR824-128R / 256R record Hikvision, Dahua or other third-party cameras?
ONVIF is not listed in the NVR824-R series datasheet, only RTSP among the protocols, so third-party support is not confirmed on paper for this version (the NVR824-R-IM series datasheet does list ONVIF Profile S/G/C/Q/A/T). Send us your camera brands and models before ordering and we will confirm, or advise the R-IM version. Smart events listed as Smart by IPC (face, LPR, temperature, SIP, UMD) come from Uniview smart cameras.
NVR824-128R or NVR824-128-R-IM-8G: which should I choose?
Both have 768 Mbps intake, 24 bays, the same RAID levels, decoding and outputs. The R version takes disks up to 24 TB each and draws up to 70 W without disks; its NVR-side smart analysis is described in a separate Smart Card datasheet. The R-IM version is limited to 16 TB per disk, draws up to 300 W, lists ONVIF, and runs face, SIP or video metadata analysis on up to 64 ordinary cameras itself. Choose R for maximum storage with Uniview smart cameras; choose R-IM if ordinary or third-party cameras need NVR-side AI.
Can I run 24 TB disks in the NVR824-128R / 256R in a room without air conditioning?
Only if the room stays at or below 40 °C. The datasheet says the largest disk size depends on room temperature and disk size, and that the environment should not exceed 40 °C, even though the recorder alone is rated up to 50 °C. In hot climates or rooms that heat up in the afternoon, use air conditioning or choose smaller disks, and watch the High CPU Temperature and High Motherboard Temperature alarms.
How do I add more screens to the NVR824-128R / 256R for a video wall?
Beyond HDMI1, HDMI2 and VGA, the recorder has 4 extension board slots for the optional FB-HD04-B-NB (4-ch HDMI output) and FB-HD07-B-NB (7-ch HDMI output) decoding cards. The built-in decoding totals 3 × 12MP, 5 × 4K or 20 × 1080P at 30 fps, so large split screens should use the cameras' sub-streams. Tell us the number of screens and layouts and we will confirm the card combination before ordering.
Ordering questions — samples, shipping, payment, lead time and genuine stock — are answered once on our FAQ page.
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