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Mixed size HDD in TS-453Be

Posted: Sun Sep 01, 2019 6:40 am
by praveenvj
Hi

I am interested in buying TS-453Be. I wanted to know if I can mix different capacity drives in the NAS in RAID 5 combination.

I currently have a WD My Cloud EX2 with 2 drives of 4 TB capacity. I am planning to buy TS-453Be and then add 2 drives of 6 TB capacity along with existing 4 TB drives and create a RAID 5 NAS. I want to know if this is a supported configuration.

Also can we upgrade the hard drive capacity in future by replacing the 4 Tb drives with 6 TB drives.

Re: Mixed size HDD in TS-453Be

Posted: Sun Sep 01, 2019 6:59 am
by P3R
praveenvj wrote:
Sun Sep 01, 2019 6:40 am
I am interested in buying TS-453Be. I wanted to know if I can mix different capacity drives in the NAS in RAID 5 combination.
Yes you can.
I currently have a WD My Cloud EX2 with 2 drives of 4 TB capacity. I am planning to buy TS-453Be and then add 2 drives of 6 TB capacity along with existing 4 TB drives and create a RAID 5 NAS. I want to know if this is a supported configuration.
It is but as RAID 5 is limited to using only the capacity of the smallest disk in the array so it will appear as being 4*4 TB.
Also can we upgrade the hard drive capacity in future by replacing the 4 Tb drives with 6 TB drives.
Yes and when all disks are 6 TB it will be possible to expand the RAID 5 array to 6*4 TB.

Re: Mixed size HDD in TS-453Be

Posted: Mon Sep 02, 2019 4:43 am
by praveenvj
Thanks for your reply

Re: Mixed size HDD in TS-453Be

Posted: Mon Sep 02, 2019 4:45 am
by praveenvj
P3R wrote:
Sun Sep 01, 2019 6:59 am
praveenvj wrote:
Sun Sep 01, 2019 6:40 am
I am interested in buying TS-453Be. I wanted to know if I can mix different capacity drives in the NAS in RAID 5 combination.
Yes you can.
I currently have a WD My Cloud EX2 with 2 drives of 4 TB capacity. I am planning to buy TS-453Be and then add 2 drives of 6 TB capacity along with existing 4 TB drives and create a RAID 5 NAS. I want to know if this is a supported configuration.
It is but as RAID 5 is limited to using only the capacity of the smallest disk in the array so it will appear as being 4*4 TB.
Also can we upgrade the hard drive capacity in future by replacing the 4 Tb drives with 6 TB drives.
Yes and when all disks are 6 TB it will be possible to expand the RAID 5 array to 6*4 TB.
Is there an option to create 2 RAID 1 arrays, one with 4x2 and other with 6x2 and then at a later date change to Raid 5 with all 6 TB drives. And will this result in loss of data?

Re: Mixed size HDD in TS-453Be

Posted: Mon Sep 02, 2019 6:12 am
by P3R
praveenvj wrote:
Mon Sep 02, 2019 4:45 am
Is there an option to create 2 RAID 1 arrays, one with 4x2 and other with 6x2 and then at a later date change to Raid 5 with all 6 TB drives.
Possible but I see no point with doing that. It would give you 4+6 TB usable data storage while a RAID 5 using the same disks would give you 12 TB usable storage and better performance.

When you've replaced both 4 TB disks with 6 TB you would have 18 TB storage.
And will this result in loss of data?
Yes, at least some of it.

Re: Mixed size HDD in TS-453Be

Posted: Tue Sep 10, 2019 7:55 am
by praveenvj
Thanks for your responses. Is there a way to access the unused space on the RAID 5 array (i.e. from the 2 disks of 6 TB capacity)?

Does QNAP have something like SHR?

Re: Mixed size HDD in TS-453Be

Posted: Tue Sep 10, 2019 1:51 pm
by P3R
No Qnap doesn't have a proprietary RAID solution.

Re: Mixed size HDD in TS-453Be

Posted: Sun Sep 15, 2019 12:04 am
by praveenvj
Thanks for your responses