Dell PowerVault MD3200 Owner's Manual - Page 132

The following settings are removed/cleared during the procedure: • Persistent reservations • Host-to-virtual disk mappings • Virtual disk copy pairs • Snapshot virtual disks and snapshot repository virtual disks • Remote mirror pairs • Mirror repositories Non-Importable Components Some components cannot be imported during the import disk group procedure. These components are removed during the procedure: • Persistent reservations • Mappings • Virtual disk copy pairs • Snapshot virtual disks and snapshot repository virtual disks Storage Array Media Scan The media scan is a background operation that examines virtual disks to verify that data is accessible. The process finds media errors before normal read and write activity is disrupted and reports errors to the event log. NOTE: You cannot enable background media scans on a virtual disk comprised of Solid State Disks (SSDs). Errors discovered by the media scan include: • Unrecovered media error-Data could not be read on the first attempt or on any subsequent attempts. For virtual disks with redundancy protection, data is reconstructed, rewritten to the physical disk, and verified and the error is reported to the event log. For virtual disks without redundancy protection (RAID 1, RAID 5, and RAID 6 virtual disks), the error is not corrected but is reported to the event log. • Recovered media error-Data could not be read by the physical disk on the first attempt but was successfully read on a subsequent attempt. Data is rewritten to the physical disk and verified and the error is reported to the event log. 132 Configuration: Disk Groups and Virtual Disks