8 Configuring the storage system234Removing hard disk drives or responding todisk failureThe effect of removing HDDs from your storage system or disk failurevaries, depending on the disk configuration you chose when youconfigured the system and the current state of the existing disks.In a linear configuration, when you remove a HDD or a HDD fails, thedata associated with that HDD is no longer available, but the data onall the other disks remains available.In a RAID configuration, the effect of HDD removal/failure varies,depending on the RAID level and whether the RAID is in a normal ordegraded state.You can determine the effect of disk removal/failure by looking at theHotplug Indicator on the Advanced:Disks page.• If the indicator is GREEN, removing the HDD or HDD failure willnot affect RAID.