Downside of having a single large storage pool
The downside of having a single large storage, whatever it is, be it a Storage Spaces pool, or a plain RAID unit, is: if there is a problem with a storage, you have nowhere to back it up to.
With a pool of 15+ disks, there is a pressing need to repair the pool in-place; otherwise, the price tag for a disk set to copy the data off, DIY-style, would be like $1500 in drives alone (15x 2TB hard drives at $100 a pop), not counting controller and power supply requirements.
However, even if the drive purchase is involved, DIY would probably still be cheaper than a service recovery. As a positive side effect, you get a disk set which can hold a backup copy of the data.
With a pool of 15+ disks, there is a pressing need to repair the pool in-place; otherwise, the price tag for a disk set to copy the data off, DIY-style, would be like $1500 in drives alone (15x 2TB hard drives at $100 a pop), not counting controller and power supply requirements.
However, even if the drive purchase is involved, DIY would probably still be cheaper than a service recovery. As a positive side effect, you get a disk set which can hold a backup copy of the data.
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