Hello exequo,   I'm sorry there is not a way to remove a drive from an array other than: Backup, Delete array, Configure the array you want, Restore data.
hi i have a DELL poweredge r330 server with this raid topo : ----------------------------------------------------------------------------DG Arr Row EID:Slot DID Type  State BT      Size PDC  PI SED DS3  FSpace TR----------------------------------------------------------------------------0 -   -   -        -   RAID5 Optl  N  21.830 TB dflt N  N   dflt N      N0 0   -   -        -   RAID5 Optl  N  21.830 TB dflt N  N   dflt N      N0 0   0   32:0     0   DRIVE Onln  N   7.276 TB dflt N  N   dflt -      N0 0   1   32:1     1   DRIVE Onln  N   7.276 TB dflt N  N   dflt -      N0 0   2   32:2     2   DRIVE Onln  N   7.276 TB dflt N  N   dflt -      N0 0   3   32:3     3   DRIVE Onln  N   7.276 TB dflt N  N   dflt -      N---------------------------------------------------------------------------- i remember adding the 4th HDD some years ago and i would like to retreive it nowdiskspace is 50% freeis it possbile without losing data ?i installed perccli command, is it a migration command ? thx
reducing a 4 HDDs raid5 to 3 HDDs