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Recovering from I/O failure on a DCO volume

If an I/O failure occurs on a DCO volume, its FastResync maps and DRL log cannot be accessed, and the DCO volume is marked with the BADLOG flag. DRL logging and recovery, and instant snapshot operations are not possible with the volume until you recover its DCO volume.

If the I/O failure also affects the data volume, it must be recovered before its DCO volume can be recovered.

See "Recovering a version 20 DCO volume" on page 28.