Media Storage

A typical Delta Nucleus server with small storage fitted has 900 GB of storage space (850 GB free), and the calculation for storage space is much the same as for performance. Delta servers can of course have much more storage fitted as required (up to 100 TB).

Usable disk capacity is not the number on the label

The raw capacity of an SSD (what it says on the box) can be 120 GB, 240 GB, 480 GB, 960 GB, 1920 GB, or 3840 GB. Part of this capacity is used for necessary overhead associated with partitioning and formatting. The result is that about 95% of the raw capacity is usable. For example, 2 × 120 GB raw disks would give around 225 GB formatted array.Beyond that, we only recommend utilizing about 95% of the available formatted capacity, because for many disk models, it is valuable for the disk’s firmware to have some breathing room for activities that aid in the longevity of the disk’s lifespan. So for example, we would recommend filling only about 214 GB of that formatted volume of around 225 GB.

Once you have worked out how many MB/s the movie will take, then the length of the movie in seconds will give the space requirement:

Media Performance (MB/s) × length of media in seconds gives space requirement

Storage size in MB / Media Performance (in MB/s) gives how many seconds available

So, for example, the 1920 × 1080 30 fps 4:4:4 movie above is 178 MB/s:

178 MB/s × 60 s = 10680 MB/1024 = 10.4 GB per minute of that size media

850 GB = 850000 MB / 178 MB/s = 4775 s = 79.5 minutes total of that size media

In the cases above, total space requirement is the total of all movies on the disk: images and audio can be discounted from the calculation, since they are usually a small fraction of uncompressed movie size.

Notes

•TGA with RLE compression (lossless) gives a variable size for each movie frame dependent on the content of that frame, so you can see typically a 50% average storage and performance reduction compared to fully uncompressed TGA, but RLE is only suitable up to a certain size of media (4k 30fps for example).

•Delta Nucleus and Infinity models can have typical media storage starting at 900 GB, but with options for up 100 TB if required.

Page edited [d/m/y]: 02/07/2021