System is stick in the ok prompt

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http://www.unix.com – Here is a little background. We have a V240 server that has two disks mirrored (out of 4 disks) and one of the disk complained when booting up. The system complained with /etc/inittab file is truncated or corrupted, cannot create /ar/adm/utmpx failed write of utmpx entry. Someone tried to fix this problem by removing the mirrored root disk and tried booting up the system. I believe with mirrored disks you cannot do that and must break the mirror to remove. Or at least boot up to the other mirrored root disk before breaking the mirror. The system boots up in the ok prompt with the origin (HowTos)