I removed a faulty disk from my RAID5 with mdadm --manage /dev/md0 -r /dev/sdd1 and replaced it with a new one. I tried to add it with mdadm --manage /dev/md0 -a /dev/sdd1 but it's only added as a spare disk.mdadm --detail /dev/md0/dev/md0:        Version : 1.0  Creation Time : Mon Jul 13 20:08:27 2015     Raid Level : raid5     Array Size : 14651324160 (13972.59 GiB 15002.96 GB)  Used Dev Size : 2930264832 (2794.52 GiB 3000.59 GB)   Raid Devices : 6  Total Devices : 7    Persistence : Superblock is persistent  Intent Bitmap : Internal    Update Time : Tue Jul 14 09:11:21 2015          State : active Active Devices : 6Working Devices : 7 Failed Devices : 0  Spare Devices : 1         Layout : left-symmetric     Chunk Size : 128K           Name : creadata:0  (local to host creadata)           UUID : c41c15fd:6e7deae3:5cace8e0:4bf7e244         Events : 7459    Number   Major   Minor   RaidDevice State       0       8       17        0      active sync   /dev/sdb1       1       8       33        1      active sync   /dev/sdc1       2       8       65        2      active sync   /dev/sde1       3       8       81        3      active sync   /dev/sdf1       4       8       97        4      active sync   /dev/sdg1       6       8      113        5      active sync   /dev/sdh1       7       8       49        -      spare   /dev/sdd1How can I tell mdadm to resync the array with the new disk?
Replacing a disk to RAID5 failed
linux;raid;mdadm