Verifying storage health (verifying that the cluster is ready)

Before and after you upgrade, revert, or downgrade a cluster, you should verify the status of your disks, aggregates, and volumes.

1. If you are preparing to upgrade, revert, or downgrade, verify disk status:

   To check for...	Do this...
   Broken disks	Display any broken disks: storage disk show -state broken Remove or replace any broken disks.
   Disks undergoing maintenance or reconstruction	Display any disks in maintenance, pending, or reconstructing states: storage disk show -state maintenance|pending|reconstructing Wait for the maintenance or reconstruction operation to finish before proceeding.

2. Verify that all aggregates are online by displaying the state of physical and logical storage, including storage aggregates: storage aggregate show -state !online

   This command displays the aggregates that are not online. All aggregates must be online before and after performing a major upgrade or reversion.

   Example

   TDC-DM7K::*> storage  aggregate  show  -state  online
   
   
   Aggregate     Size Available Used% State   #Vols  Nodes            RAID Status
   --------- -------- --------- ----- ------- ------ ---------------- ------------
   Data_Aggr_Ctrl_1
              12.57TB   11.36TB   10% online       2 TDC-DM7K- raid_dp,
                                                     01               normal
   Data_Aggr_Ctrl_2
              12.57TB   10.36TB   18% online       1 TDC-DM7K- raid_dp,
                                                     02               normal
   aggr0_TDC_7K_01
              368.4GB   17.86GB   95% online       1 TDC-DM7K- raid_dp,
                                                     01               normal
   aggr0_TDC_7K_02
              368.4GB   17.86GB   95% online       1 TDC-DM7K- raid_dp,
                                                     02               normal
   4 entries were displayed.
   
3. Verify that all volumes are online by displaying any volumes that are not online: volume show -state !online

   All volumes must be online before and after performing a major upgrade or reversion.

   Example

   TDC-DM7K::*> volume  show -state online
   Vserver   Volume       Aggregate    State      Type       Size  Available Used%
   --------- ------------ ------------ ---------- ---- ---------- ---------- -----
   TDC-7K-01
             vol0         aggr0_TDC_7K_01
                                       online     RW      348.6GB    287.3GB   13%
   TDC-7K-02
             vol0         aggr0_TDC_7K_02
                                       online     RW      348.6GB    286.0GB   13%
   svm0      svm0_root    Data_Aggr_Ctrl_1
                                       online     RW          1GB    972.1MB    0%
   svm0      v1           Data_Aggr_Ctrl_1
                                       online     RW       1.20TB    139.3GB   88%
   svm0      v2           Data_Aggr_Ctrl_2
                                       online     RW       2.20TB    84.09GB   96%
   5 entries were displayed.
   
4. Verify that there are no inconsistent volumes: volume show -is-inconsistent true
   If any inconsistent volumes are returned, you must contact Lenovo Support before you precede with the upgrade.