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Forum Discussion
4TB hard disks
It is early days yet but 4TB disks are starting to trickle on to the market. I am aware so far of two different makes being launched they being Seagate and Hitachi. Hitachi at least have now made a ki...
Good plan. Even though it appears 4TB drives probably already work fine in general, it's possible that particular drives may have compatibility issues that need to be addressed by a firmware update. So before you add 4TB drives (once they are approved) be sure to update to the latest production firmware available at that time.
There are a couple of expansion issues to be aware of though:
1. You cannot expand past 16TB. You must factory default with that capacity in place. So if you want a single-redundant volume with 6x4TB disks you'll need to backup your data and do a factory reset. A dual-redundant volume would come in under the 16TB limit
2. Limit of 8TB for online expansion of 64-bit system (e.g. Pro) using EXT4 filesystem e.g. if original volume capacity after last factory default was 4TB you can't expand beyond 12TB online.
There are a couple of expansion issues to be aware of though:
1. You cannot expand past 16TB. You must factory default with that capacity in place. So if you want a single-redundant volume with 6x4TB disks you'll need to backup your data and do a factory reset. A dual-redundant volume would come in under the 16TB limit
2. Limit of 8TB for online expansion of 64-bit system (e.g. Pro) using EXT4 filesystem e.g. if original volume capacity after last factory default was 4TB you can't expand beyond 12TB online.
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