zpool split on rpool returns with "Unable to split rpool: pool already exists"
(Doc ID 2031918.1)
Last updated on JULY 29, 2016
Applies to:Solaris Operating System - Version 10 5/08 U5 to 11.2 [Release 10.0 to 11.0]
Information in this document applies to any platform.
Apparently there are no issues with the rpool, that would prohibit us to do the split.
In this case the error message is misleading, as described in Bug ID 19308779: "Unable to split rpool: pool already exists"
Where in this case the message should be "Unable to split rpool: log device has unplayed intent logs"
For synchronous writes, ZFS uses the ZIL (ZFS Intent Log). This is a per-filesystem facility to which data is written immediately and later committed to the main pool as part of a DMU transaction group. In the event of a crash or power failure, the log is examined on reboot and data that is not committed to main pool are replayed.
Reproduction of the error, while confirming that there is not an existing zpool called rpool2:
Unable to split rpool: pool already exists
# zpool status
scan: resilvered 61.6G in 0h14m with 0 errors on Fri Jul 10 12:21:45 2015
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
c0t5000CCA0543A05F8d0 ONLINE 0 0 0
c0t5000CCA0543A9768d0 ONLINE 0 0 0
c0t5000CCA0433A7640d0 ONLINE 0 0 0
errors: No known data errors
# zpool import
no pools available to import
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