8464ch09_Oper.fm Draft Document for Review February 7, 2020 3:15 pm For more information about these informational messages, see the  IBM TS7700 Series  Operator Informational Messages White Paper , WP101689. When the TS7700 determines that one of its tape drives is not operating correctly and  requires service (because of read/write errors, fiber interface, or another hardware-related  reason), the drive is marked offline and an IBM SSR must be engaged. The following  intervention- required message is displayed on the Library Manager Console: CBR3750I MESSAGE FROM LIBRARY  lib : Device  xxx  made unavailable by a VTS. (VTS z) Operation of the TS7700 continues with a reduced number of drives until the repair action on  the drive is complete. To recover, the IBM SSR repairs the failed tape drive and makes it  available for the TS7700 to use it again. The message  OP0123 Physical volume in read-only status due to successive media  errors  reports that a specific cartridge that belongs to the TS7700T exceeded the media  error threshold, encountered a permanent error during write or read operations, or is  damaged. The faulty condition is reported by the tape drive to the cluster, and the cartridge is  flagged Read-Only by the running cluster code. A read-only status means that new data is not  written to that suboptimal media.  By default, this cartridge is corrected by an internal function of the TS7700 named Automated  ROR. Make sure that the IBM SSR includes enabled Automated ROR in the cluster.  Automated ROR is the process by which hierarchical storage management (HSM) recalls all  active data from a particular physical volume that exceeded its error thresholds, encountered  a permanent error, or is damaged.  IBM 3592 tape drive failure (TS7700T) Physical volume in read-only status This process extracts all active data (in the active logical volumes) that is contained in that  read-only cartridge. When all active logical volumes are successfully retrieved from that  cartridge, the Automated ROR process ejects the suboptimal physical cartridge from the tape  library, which ends the recovery process with success. Messages  OP0100 A read-only  status physical volume xxxxxx has been ejected  or  OP0099 Volser XXXXXX was ejected  during recovery processing  reports that the volume was ejected successfully.  After the ejection is complete, the cartridge VOLID is removed from the TS7700 physical  cartridges inventory.  Note:  By design, the tape attach TS7700 never ejects a cartridge that contains any active  data. The requirement to eject a physical cartridge is to move off all active data to another  physical cartridge in the same pool, and only then the cartridge can be ejected. If Automated ROR process successfully ejects a read-only cartridge, no other actions are  needed, except inserting a new cartridge to replace the ejected cartridge.  The ROR ejection task runs at a low priority to avoid causing any impact on the production  environment. The complete process, from cartridge being flagged Read-Only to the  OP0100 A  read-only status physical volume xxxxxx has been ejected  message, which signals the  end of the process, can take several hours (typically one day to complete). If the process fails to retrieve the active logical volumes from that cartridge because of a  damaged media or unrecoverable read error, the next actions depend on the current  configuration that is implemented in this cluster, whether stand-alone or part of a multi-cluster  grid. Chapter 9. Configuring and operating the IBM TS7700  581