Solaris 10 5/09 Release Notes

zpool attach Command Does Not Copy bootblock Information (6668666)

If you use the zpool attach command to add a disk to a ZFS root pool, the bootblock information is not copied to the newly added disk. This problem does not affect mirrored ZFS root pools that are created with an initial installation. System does not boot from alternate disk in the mirrored root pool.

Workaround: Choose one of the following workarounds: