无法向现有分区聚合添加新磁盘

cluster::> storage aggregate add-disks -aggregate <aggr_name> -diskcount 3 -raidgroup rg0

Info: Disks would be added to aggregate <aggr_name> on node node-01 in the following manner:

    First Plex

 RAID Group rg0, 26 disks (block checksum, raid_dp)
                               Usable Physical

    Position   Disk            Type       Size    Size
    ---------- ------------------------- ----------    -------- --------
    shared    1.4.19           SSD       723.3GB  745.2GB
    shared    1.4.20           SSD       723.3GB  745.2GB
    shared    1.4.21           SSD       723.3GB  745.2GB

    Aggregate capacity available for volume use would be increased by 1.91TB.

    The following disks would be partitioned: 1.4.21, 1.4.20, 1.4.19.

Do you want to continue? {y|n}: y

Error: command failed: Failed to add disks to aggregate <aggr_name>. Reason: HDD
partitioning not supported.