The /etc/lvm/md.cf file is a backup file of the DiskSuite configuration for a "local" diskset. You use the md.cf file for recovering from failures. Whenever you make a configuration change, the md.cf file is automatically updated (except for hot sparing). You never edit the md.cf file directly. If your system loses the information maintained in the metadevice state database, and as long as no metadevices were changed or created in the meantime, you can use the md.cf file to recover. Refer to Solstice DiskSuite 4.2.1 User's Guide for more information.