Sizing of ReFS Storage

[MichaelG7]

Hello,

we have to protect around 150TB of data on Plant 1. Plant 2 has around 30TB of data.
We want to store the data at least one month on disk on the primary side.
Backup copy jobs should replicate the most current backups between the two plants.

Some jobs are weekly, others are daily.
With consideration of our growth we need according to rps.dewin.me around 750TB of storage.

We have a hardware backup server with a tape library attached. We plan to add a simple single (1 on each plant), ReFS formatted storage to the backup server with 96*12TB disks for roughly 1PB of space. We were thinking about using RAID60 for the storage.

Are there any concerns from your experience?

[HannesK]

Hello,
RAID 60 (or any other double parity redundancy) sounds good, yes. Depending on the performance and rebuild times for broken disks, I might go for smaller disks. With the popular 60 / 70 disk servers / shelves that would be 120 / 140 disks.

The key point for the calculation is probably change rate (I would go with 3% for 180TB source data) and growth.

Best regards,
Hannes