thanks for your confirmation , the problem is that in order to expand any storage pool , we need the same number of disks used to create the RAID type or multiples of it   which means in your case 11 disks or multiple of 11  of the same type needed  currently , you can either create a new storage pool with RAID 5 (4+1) setup or to move the hotspare disk to the unconfigured pool again so you get 11 available disk but kindly note that this would be more risky as no available hotspare will exist  waiting your feedback kind regards,  Khaled El Edwy
Hello  The system is VNXe3150 with 12Xsas 600GB 15K disks. I've created a storage pool using all the disks. Now i'm runni gout of disk space and I've bought a new disk-array enclosure. In the new enclosure there are 10 identical disks ( sas 600GB 15K). When i'm trying to expand the disk pool, i'm getting this message : "There are not enough disks available for this storage pool. To continue, add more disks of the same type, capacity, and rotational speed."  What is the problem?  Yaniv
Adding more disks to an existing pool failes