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- May 17, 2014
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What we mean by not reliable, is the interface for USB is not reliable like SATA, SAS or NVMe. Their are many things that can go wrong with USB attached disks, as explained in the Resource I referenced. You might get lucky and none of those problems may affect you. But they HAVE affected others, so we warn against the use of USB attached disks for data drives.
Next, if this external RAID does stripe or concatenate its drive together, loss of one disk means the loss of all data on both drives. Perhaps not a problem for you. One way to avoid that, is to create separate ZFS pools for each disk that is to be used in a non-redundant configuration. That does mean you have to "manage" which files go on which pool & dataset. But, loss of a single disk pool does not affect any other single disk pools.
All this is not meant to stop you, just we want you to know the risks.
Next, if this external RAID does stripe or concatenate its drive together, loss of one disk means the loss of all data on both drives. Perhaps not a problem for you. One way to avoid that, is to create separate ZFS pools for each disk that is to be used in a non-redundant configuration. That does mean you have to "manage" which files go on which pool & dataset. But, loss of a single disk pool does not affect any other single disk pools.
All this is not meant to stop you, just we want you to know the risks.