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Replace hard disks and reduce number of hard disks

PostPosted: Thu Aug 01, 2019 6:59 pm
by SoGX
Hello, everybody,

I currently have 7x4TB hard disks in a RAID-6 array in my AS-608T NAS. Is it possible to replace them with 4x12TB drives?
I don't want to change all 7 disks at the moment, because 12TB disks are still relatively expensive and I don't need the space yet.

Regards

Re: Replace hard disks and reduce number of hard disks

PostPosted: Fri Aug 02, 2019 9:59 am
by orion

Re: Replace hard disks and reduce number of hard disks

PostPosted: Fri Aug 02, 2019 2:33 pm
by SoGX
This is a guide that describes how to replace all your hard drives with larger ones.
If I replaced only 4 of my 7 4TB disks with 12TB disks and removed the remaining 3 hard disks from the NAS, my RAID 6 would break.
Or am I making a thinking mistake?

Re: Replace hard disks and reduce number of hard disks

PostPosted: Mon Aug 05, 2019 10:22 am
by orion
OK, I misunderstood what you want to do. I thought that you want to "RAID6 volume-1 with 7 * 4 TB disks" -> "RAID6 volume-1 with (4 * 12 TB disks) + (3 * 4 TB disk)".

If you plan "RAID6 volume-1 with 7 * 4 TB disks" -> "RAID6 volume-1 with (4 * 12 TB disks)", you need to backup all of your data externally, then destroy the old volume and re-create a new volume with the new disks.

Re: Replace hard disks and reduce number of hard disks

PostPosted: Tue Aug 06, 2019 4:15 am
by SoGX
Thank you very much for your answer,

exactly the answer I was afraid, that it would be quite an effort :-D