EVS XT4K - Page 27

Real-Time Channel Calculation
Rule
The maximum server bandwidth depends on the disks. Based on the assumption that
Seagate disks of 900 GB (10K8) are used in 4+1 raids, the disks will be able to write 400
MB/s, and the maximum server bandwidth is therefore 400 MB/s.
For a mixed configuration with standard and super motion channels on the same EVS
server, the following calculation must be used to ensure that the settings do not exceed
the maximum bandwidth of the server, that is to say 400 MB/s:
(nbr of standard channels x their block-based bandwidth)
+ (nbr of super motion channels x their block-based bandwidth)
Example with Standard and SLSM Channels in 4K
Can I run an XT4K server with 2 record channels (1x 4K SLSM2x + 1x 4K standard) + 2
play channels (1x 4K SLSM2x + 1x 4K standard) in XAVC-Intra 4K with a video bitrate of
500 Mbps in PAL ?
Calculation:
• 1 standard rec/play at 500 Mbps uses 66.6 MB/s
• 1 SLSM record/play at 500 Mbps uses 133.3 MB/s
• All channels will use: 2 x 66.6 + 2 x 133.3 = 399.6 MB/s.
Conclusion: this configuration is supported as it is just lower than 400 MB/s.
TECHNICAL REFERENCE MANUAL XT4K Server 15.2
4. Software Specifications 19