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Network Forensics Storage Calculator

Need to determine the storage capacity needed for packet capture forensic analysis? This handy calculator converts bps and utilization into gigabytes of storage. ( Calculates for 1 hour, 24 hours, 4 days and 7 days to gigabytes of storage.

The calculator uses average bandwidth utilization and assume full duplex send receive traffic at that rate of utilization.

 

Percent Utilization Factor Speed bps  
( two digit number for percentage)
1024 GB = 1 Terabyte
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Sample Storage Requirements needed for Network Forensics with common WAN Connection

Drive Speed @ 25  Megabytes per Second Gigabytes Storage Required
Wan Connection
Speed bps
* Full Duplex Maximum bps
**Limit bps
GB/hr.
Hours
8
16
24
Days
2
4
7
T1 1,544,000 2,007,200 209,715,200 6.73 54 108 162 323 646 1131
T3 43,000,000 55,900,000 209,715,200 187.42 1499 2999 4498 8996 17992 31486
OC-1 51,850,000 67,405,000 209,715,200 225.99 1808 3616 5424 10848 21695 37967
OC-3 155,520,000 202,176,000 209,715,200 677.85 5423 10846 16268 32537 65073 113878

* Assumes Full Duplex and 65% continuous utilization. This can be consided a fairly high utilization rate.
** Drives Write Limit bits per second maximum
N/A - Not applicable as it exceeds write capabilities of the drive. 
Note: Drive Write Speeds of 15 to 20 MB per second will support all but OC-3

 

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