VMS Archive & Disk Load Calculator

Video Management System archive sizing and disk load calculation

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Cameras & encoding

01
Bitrate
Auto bitrate is estimated from resolution + FPS + codec + activity + GOP (approximation).
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Recording, motion & streams

02
Playback
Playback load = how many cameras are viewed in the archive simultaneously (additional read throughput).
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RAID & disk performance

03
Calculator selects disk count assuming JBOD. If you plan RAID: RAID5 → +1 disk, RAID6 → +2 disks, RAID10 → ×2 disks (even count).
Manual speeds
“Mixed mode” is typically the most important for VMS (recording + playback at the same time).
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Results & recommendations

Write + playback
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Effective disk load
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Required usable capacity
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Disk profile assumption
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Change parameters and press “CALCULATE”.
This calculation is informational and is not a guarantee of specific performance or archive retention. Final configuration must be validated with real-world testing. System behavior is affected by factors that cannot be fully modeled (VMS implementation, firmware, I/O scheduler, RAID controller, workload fluctuations).