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既存のミラーリングされたアグリゲートにディスクを追加するシミュレーションを行うと、最初のプレックスのディスク数が2番目のプレックスと異なる数値を示す

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環境

ONTAP 9.x

問題

コマンド「storage aggregate add-disks -aggregate -simulate」を実行して既存のミラーリングされたアグリゲートにディスクを追加すると、最初のプレックスのディスク数が2番目のプレックスとは異なる数値で表示されます。

例:

以下のコマンドは、既存のアグリゲート「aggr_ssd」に11個のディスクを追加します:

Cluster::> storage aggregate add-disks -aggregate aggr_ssd -disklist 1.31.12,1.31.13,1.31.14,1.31.15,1.31.16,1.31.17,1.31.18,1.31.19,1.31.20,1.31.21,1.31.22 -raidgroup rg0 -mirror-disklist 4.21.12,4.21.13,4.21.14,4.21.15,4.21.16,4.21.17,4.21.18,4.21.19,4.21.20,4.21.21,4.21.22 -simulate

Disks would be added to aggregate "aggr_ssd" on node "Cluster_node1" in the following manner:

First Plex

RAID Group rg0, 22 disks (block checksum, raid_dp)
Usable Physical
Position Disk Type Size Size
---------- ------------------------- ---------- -------- --------
data 1.31.12 SSD 3.49TB 3.49TB
data 1.31.13 SSD 3.49TB 3.49TB
data 1.31.14 SSD 3.49TB 3.49TB
data 1.31.15 SSD 3.49TB 3.49TB
data 1.31.16 SSD 3.49TB 3.49TB
data 1.31.17 SSD 3.49TB 3.49TB
data 1.31.18 SSD 3.49TB 3.49TB
data 1.31.19 SSD 3.49TB 3.49TB
data 1.31.20 SSD 3.49TB 3.49TB
data 1.31.21 SSD 3.49TB 3.49TB
data 1.31.22 SSD 3.49TB 3.49TB

Second Plex

RAID Group rg0, 11 disks (block checksum, raid_dp)
Usable Physical
Position Disk Type Size Size
---------- ------------------------- ---------- -------- --------
data 4.21.12 SSD 3.49TB 3.49TB
data 4.21.13 SSD 3.49TB 3.49TB
data 4.21.14 SSD 3.49TB 3.49TB
data 4.21.15 SSD 3.49TB 3.49TB
data 4.21.16 SSD 3.49TB 3.49TB
data 4.21.17 SSD 3.49TB 3.49TB
data 4.21.18 SSD 3.49TB 3.49TB
data 4.21.19 SSD 3.49TB 3.49TB
data 4.21.20 SSD 3.49TB 3.49TB
data 4.21.21 SSD 3.49TB 3.49TB
data 4.21.22 SSD 3.49TB 3.49TB

Aggregate capacity available for volume use would be increased by 32.85TB.

 

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