I am thinking of switching from TrueNAS "Scale" to unRAID.
My current setup is ;
Pool 1 for media storage = 8x HDD's in a Raid z2. ( 6x 3tb and 2x 6tb )
Pool 2 for media storage = 2x HDD's in a Mirror. ( 2x 10tb )
Pool 3 for Docker images and important data = 3x SSD's in a 3 way mirror. ( 3x 256gb )
Unused HDD's = 3x 6tb, 1x 4tb and 4x 2tb.
I would need to buy 3x 6tb HDD's ( £500 ) to expand the Raid z2 pool storage from 18tb to 36tb.
Buying an unRAID Pro license for £100 I could get similar storage space as above using the the HDD's I already have, saving myself £400.
In unRAID I would want to use "dual parity" and from what I've read the most conventional setup would be,
2x 10tb HDD's as parity and all other HDD's used for data.
However I am not keen on doing this for 2 reasons ;
1. If a 10tb parity HDD failed, " I think " I would need to replace it with another 10tb HDD to match the remaining 10tb parity HDD. ( almost £300 )
[ Or am I wrong and could I replace a failed 10tb parity HDD with a 6tb HDD because none of the "data drives" are bigger than 6tb ? ]
2. I would like to keep my two mirrored pools as they are ( ZFS ) and just export them from TrueNAS and then import them into unRAID. ( Keeping them separate from the main unRAID array )
So my idea is ;
Main array
Parity = 2x 6tb HDD's
Data = 3x 6tb, 3x3tb and 1x4tb HDD's"
ZFS Mirror 1 ( pool )
2x 10tb HDD's ( exported from truenas and imported into unRAID )
ZFS Mirror 2 ( pool )
3x 256gb SSD's ( exported from truenas and imported into unRAID )
I am not interested in having any type of cache drives. I will keep all the HDD's spinning at all times and enable " turbo write "
What do you guys think ? Sorry for the VERY long post and thanks in advance to anyone who read all of this lol.
[ p.s ] [ my motherboard only has 14 SATA connections ]