How to Enable a Slice in a RAID5 Metadevice (Command Line)

After checking the prerequisites ("Prerequisites for Maintaining DiskSuite Objects"), the overview ("Overview of Replacing and Enabling Slices in Mirrors and RAID5 Metadevices"), and the preliminary information ("Preliminary Information For Replacing and Enabling Slices in Mirrors and RAID5 Metadevices"), use the metareplace(1M) command to enable an errored slice in a RAID5 metadevice. metareplace(1M) automatically starts a resync to get the new slice in sync with the rest of the RAID5 metadevice.

Example -- Enabling a Slice in a RAID5 Metadevice

# metareplace -e d20 c2t0d0s2

The RAID5 metadevice d20 has a slice, c2t0d0s2, which had a soft error. The metareplace command with the -e option enables the slice.

If a disk drive is defective, you can either replace it with another available disk (and its slices) on the system as documented in "How to Replace a RAID5 Slice (Command Line)", or repair/replace the disk, format it, and run metareplace with the -e option.