Grow RAID5 array
Hello everyone ..
I long wondered that if you only lose 20% instead of 33% due to parity info in RAID5-arrays when using like 6x1TB disks, can you just create the 3x1TB array first, transfer everything you want backuped from the 2 other disks to the newly created array and grow it to 6 and will it use 20% of parity if you grow it from 3 to 6 instead of creating a 6 raid-array right away?
I have 1TB disk entirely filled so I would like to create a "small" raid first of 3 and then expand to 6.
The purpose of the RAID-array is to store files intact so the checksum matches everytime, disk load will not be very high since it will only perform uploads with maximum 1MB/s, but I want to be able to read it meanwhile.