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Using disc spanning for RAID array (lemmy.world)

submitted 2 years ago by qaz@lemmy.world to c/selfhosted@lemmy.world

9 comments fedilink hide all child comments

I'm planning on building a new home server and was thinking about the possibility to use disc spanning to create matching disk sizes for a RAID array. I have 2x2TB drives and 4x4TB drives.

Comparison with RAID 5

4 x 4 TB drives

1 RAID array
12 TB total

4 x 4 TB drives & 2 x 2 TB drives

2 RAID arrays
14 TB total

5 x 4* TB drives

Several 4TB disks and 2 smaller disks spanned to produce a 4 TB block device
16 TB total

I'm not actually planning on actually doing this because this setup will probably have all kinds of problems, however I do wonder, what would those problems be?

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[–] TheHolm@aussie.zone 0 points 2 years ago

I do not see why it will cause any problems with exception of stacking mapping layer. I wonder can LVM do it natively without adding intermediate block device of 2 x 2G?