Using an automated script to lock storage
Instead of manually operating the Lock and Unlock buttons, you can use a third-party application to run an automated script to lock the storage by manipulating the storage_lock table in the DS-System database.
Table 6 Storage lock details
column name | Description |
|---|
lock_cmd | This value must be set by the third-party application. • 1 = lock (all attempts to change the online storage will be paused) • 2 = unlock (instructs DS-System to release the online storage for normal operation) |
lock_status | The third-party application must wait until this value changes from “0” before performing the snapshot. This may take a few moments in an N+1 configuration (where multiple nodes must each lock their storage). • 0 = normal • non-zero = locked |
Ensure that the third-party application performs the following sequence:
1. Set lock_cmd to “1”.
2. Wait until lock_status is not zero.
3. Run snapshot.
4. Set lock_cmd to “2”.
IMPORTANT: Do not alter any other table in the DS-System database.