Hello,   Check your volumes to see if it's reporting it just at the volume level.  If so, then you can acknowledge the lost blocks in the GUI or at the Group CLI.   The cause is related to the weakness of RAID5.  During the rebuild another drive (or drives) had an error.  That caused the parity calculation to fail for those blocks.  So you likely have other drives that could fail.  At the Group CLI.  GrpName>vol sel MEMBERNAME lost-blocks mark-valid  Regards, Don
HI there. I am out of warranty but hoping somebody can guide me. After a RAID 5 rebuild (failed disk) I can see error 28.3.27 "Lost blocks detected in a RAID set". The rebuild completed successfully but not sure what to do here. SAN is PS6000 and running firmware Storage Array firmware V6.011 (R393352)
Lost blocks detected in a RAID set