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Are 4TB Hard drives ok for the XRAID2 Firmware ?
Hi. I have a 6 drive bay Readynas with the X-raid 2 firmware and I'm wondering if I can fill it up with 4TB hard drives? Thanks. P.S. What the heck happen to this forum. Where is the blue...
Yes. Doing a factory reset you will be able to fully utilise the space on the disks.
On the compatibility list under Legacy > ReadyNAS Pro Pioneer Edition there is a 4TB disk.
Do be aware of the expansion limitations of RAIDiator-x86 4.2.x:
1. You cannot expand a volume by more than 8TB over the life of the volume
2. You cannot expand the volume past 16TB. To get a higher capacity volume you would need to do a factory default (wipes all data, settings, everything) with the disks in place.
I am usually too scared to trust the expansion and usually build my readynas systems to the max instead of slowly expanding it even though I know it can technically be done.
I am confusued by what you mean by " You cannot expand the volume past 16TB. To get a higher capacity volume you would need to do a factory default (wipes all data, settings, everything) with the disks in place."
Are you saying that it will be maxed out at 16TB or only if you are expanding it?
In other words, is it possible to get 24TB( 4TB drives X 6 bays) if you do the factory default and a fresh install?
Thanks.
miogpsrocks wrote:
Are you saying that it will be maxed out at 16TB or only if you are expanding it?
The latter.
miogpsrocks wrote:
In other words, is it possible to get 24TB( 4TB drives X 6 bays) if you do the factory default and a fresh install?
6x4TB drives in RAID-5 would give a volume capacity above 16TB. You would need to do a factory default to get a volume of this capacity.
Using RAID-6 the volume capacity would be below 16TB.When you say 16GB can be achieved by the factory default option, are you assuming that I am using a 4-bay system or taking into account that I have a 6-bay system?
Since I am using a 6 bay system, I would normally assume that 6 X 4 = 24, in raid 5 you would have 1 drive for parity and end up with 20 GB of usable space normally.
Are you saying there is a limit in the system to 16GB regardless if how many hard drives bays or what their size, the limit will never be more than 16GB?
I just want to make sure I understand you correctly and you are factoring in that I'm using a 6 drive system and not a 4 drive system?
Thanks.
No. You can get a volume larger than 16TB if you do a factory default with the disks in place. Your volume capacity will be about 18TB when you do a factory default with 6x4TB disks in place.
Well 6x4TB and one disk for redundancy would give 20TB. However note we measure in TiB but like most computers call it TB. So 20 * 1000^4 /1024^4 = 18.19. There are of course some overheads so the actual volume capacity is a little less. If you tried to expand an existing volume it would fail as you cannot expand past 16TB.
With RAID-6 (dual-redundancy) and 6x4TB disks you would have 16TB which is less than 16TiB. So expanding a dual-redundant volume using 4TB disks would be fine provided you don't hit the 8TB expansion over the life of the volume limit.
Our new devices run ReadyNAS OS 6 and do not have the expansion limitations that RAIDiator-x86 4.2.x had.
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