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Aggregate expansion reports warning One or more disks will not be added

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Category:
disk-drives
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hw
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Applies to

  • ONTAP 9
  • FAS/AFF Systems

Issue

While adding disks to an existing aggregate, the following warning is reported:

Cluster::> storage aggregate add-disks -aggregate aggr_1 -diskcount 6 -raidgroup all -simulate true
Disks would be added to aggregate "aggr_1" on node "node-01" in the following manner:
First Plex

RAID Group rg0, 16 disks (block checksum, raid_dp)
Usable Physical
Position   Disk                      Type       Size     Size
---------- ------------------------- ---------- -------- --------
shared     2.6.6                     SAS        1.61TB   1.64TB
shared     2.4.19                    SAS        1.61TB   1.64TB
shared     2.6.7                     SAS        1.61TB   1.64TB
shared     2.4.20                    SAS        1.61TB   1.64TB
shared     2.6.8                     SAS        1.61TB   1.64TB

Aggregate capacity available for volume use would be increased by 7.25TB.
The following disks would be partitioned: 2.6.8, 2.4.20, 2.6.7, 2.4.19, 2.6.6.

Warning: One or more disks will not be added. 6 disks specified, 5 disks will be added.

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