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Best way to build 2 NAS Server (25TB each RAID6) for replication - using existing readynas hardware
we are trying to build 2 NAS servers with around 25TB RAID6 Storage (replicate with each other -21TB used so far) & we need to figure out the least expensive way to do this utilizing existing hardwar...
I'm not sure if your target sizes are TiB or TB. I'm assuming TiB.
The general rule with dual redundancy is that the four largest disks should all be the same size. Otherwise you are wasting space. IMO the small disks don't really help enough to be worth the trouble.
What I would do is get one more 6 TB drive and go with
RN716x: 4x10TB+8 TB -> 28 TB (25.4 TiB) of total storage
RN628x: 4x6TB+4x4TB-> 28 TB (25.4 TiB) of total storage
No need for the EDA500s or small disks.
If you can't spend anything on new drives then go with
RN628x: 3x6TB+5x4TB (24TB) with a second volume on one of the EDA500s: 1x3TB + 3x2TB (4 TB).
That also gives you 28 TB total, though split across two volumes. Note it wastes space on both the 628x and the EDA500 (since the four largest disks aren't the same size).
The drawback with both plans is that they require a full backup of your existing setup before you can migrate to it. I don't see any path that avoids that problem though.
I'm not sure if your target sizes are TiB or TB. I'm assuming TiB.
The general rule with dual redundancy is that the four largest disks should all be the same size. Otherwise you are wasting space. IMO the small disks don't really help enough to be worth the trouble.
What I would do is get one more 6 TB drive and go with
RN716x: 4x10TB+8 TB -> 28 TB (25.4 TiB) of total storage
RN628x: 4x6TB+4x4TB-> 28 TB (25.4 TiB) of total storage
No need for the EDA500s or small disks.
If you can't spend anything on new drives then go with
RN628x: 3x6TB+5x4TB (24TB) with a second volume on one of the EDA500s: 1x3TB + 3x2TB (4 TB).
That also gives you 28 TB total, though split across two volumes. Note it wastes space on both the 628x and the EDA500 (since the four largest disks aren't the same size).
The drawback with both plans is that they require a full backup of your existing setup before you can migrate to it. I don't see any path that avoids that problem though.
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