This describes precautions when using NAS Snapshot to automatically collect snapshots of the NAS volume.
Information
Refer to "NAS Environment Snapshot" in the Storage Cruiser Operation Guide for the NAS Snapshot feature.
Sharing Resources with SAN Environment Advanced Copy
The NAS Snapshot feature is achieved using SnapOPC+.
For this reason, when used simultaneously with the SAN environment Advanced Copy, estimate the additional requirements for NAS Snapshots. The required capacity for NAS Snapshot is as follows:
Number of ETERNUS Disk storage system copy sessions
The same number of copy sessions as the number of NAS volumes is required to operate NAS Snapshots.
SDP (Snap Data Pool)
NAS Snapshot requires the amount of SDP capacity estimated according to the following formula:
SDP additional capacity = total value of NAS volume updates (*1) for each generation
*1: This is the amount of NAS volume updates from start of a snapshot until the next snapshot for this volume is started.
When it is difficult to estimate the update amount, we recommend adding the following capacity. As this is a recommended value, it needs to be modified according to the actual usage.
SDP additional capacity = total volume of target NAS volumes for NAS Snapshot * (a number between 0.3 and 0.5)
Execute Backup/Restore While Taking NAS Snapshot
If backup/restore is performed after starting snapshot collection of a NAS volume, a ccm5008 error message is output and the process is terminated.
Execute the NAS volume backup/restore after stopping snapshot collection.
Information
Refer to "Start/Stop Automatic Snapshot Collection" in the Web Console Guide for how to stop the automatic snapshot collection.
