short question from us. We are using a Dynamic Disk Pool with 14 Drives. In the past we had 3 failures of hard disks. No problem for the DDP, disks were removed and new ones inserted. No impact on performance.
Now we had a disk failure and immediately a rebuild started for over 4 hours. Performance was degraded so that customers were not able to work. The only change in configuration was SSD Cache. Same I/O on the system.