That 4th, file, device wouldn't need to be physically large, would it??
It could reside on a much smaller disk. And smaller disks I have a
bagload of.
On 2014-02-11 11:13, Jim Klimov wrote:
Technically, it is possible to fool ZFS into making a pool with a
missing device (i.e. make a raidz1 with 3 disks and a file, then
delete the file and export-import the pool). This would cause the
pool to be degraded, but ready for re-attachment of your original
disk after migration is complete.
I would not gamble with this without backups (I did gamble with
this approach and did not lose a bit, but it is still risky),
and if possible - not forfeiting all redundancy (i.e. make a
degraded raidz2/3 with one or two disks missing instead of a
setup with no hiccup-protection at all).
HTH,
//Jim
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