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| Product: Volume Manager Guides | |
| Manual: Volume Manager 4.1 Troubleshooting Guide | |
I/O Failure on a DCO VolumeIf 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 using the procedure described in Recovering a Version 20 DCO. 
Note
If the I/O failure also affects the data volume, it must be recovered before its DCO volume can be recovered.
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| Product: Volume Manager Guides | |
| Manual: Volume Manager 4.1 Troubleshooting Guide | |
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