How to calculate RAID size?
Therefore, the usable capacity of a RAID 5 array is (N-1) x S(min) , where N is the total number of drives in the array and S(min) is the capacity of the smallest drive in the array.
How to calculate RAID 5 usable disk space?
A simple rule for RAID 5 calculation is to take the amount of capacity on the disk drive (in this case 146 GB) and reduce it by about 15% to get an idea of the usable amount that will be available to hosts.
Can Synology have different size drives?
You can replace existing drives with ones of a larger size to expand the storage capacity of your Synology NAS. Follow the steps below that apply to your storage configuration: RAID 5+spare configuration.
Can you change RAID without losing data?
Storage pools can be changed from one RAID type to another without losing existing data. For example, you can create a RAID 1 storage pool on your Synology NAS and later change it to RAID 5 if you install more drives.
How do I use the raid calculator?
Using the RAID calculator. The calculator inputs are straightforward: RAID type, drive capacity, cost, drives per RAID and number of RAID groups. The calculator supports over the 10 major types of RAID setups. Various types of data units are supported for input, and while the cost is indicated in U.S.
How many disks can I use in a RAID controller?
However, both writing and reading can happen simultaneously, so the performance is double that of a single disk. Even better, if you use three disks in RAID 0, and you would get 3x the read and write performance. You would only be limited to the maximum number of disks you could connect to a single RAID controller.
What is the difference between RAID 10 and RAID 50?
Similar to RAID 10, one disk per sub-array can fail without data loss. The advantage of RAID 50, however, is that the usable capacity utilization starts at 67%. There is no gain in write performance over a single drive, but the read speed can be up to a multiple of the total number of disks minus the number of RAID 5 sub-arrays.