The DP-VOL protection function enables you to protect the DP-VOLs using a pool from read and write requests when problems occur in the pool or pool volumes. For example, in a pool comprised of pool volumes assigned by parity groups with accelerated compression enabled, the access attribute of the DP-VOL changes to Protect when the capacity reserved for writing is depleted.

You can use the Create Pools window or the Edit Pools window to set the following DP-VOL protection options:

• Protect V-VOLs when I/O fails to Full Pool: Enable this option to protect the DP-VOLs using the pool from read and write requests when the pool usage reaches the full size.
• Protect V-VOLs when I/O fails to Blocked Pool VOL: Enable this option to protect the DP-VOLs using the pool from read and write requests when the pool-VOL is blocked.

The requirements for using the DP-VOL protection function are:

• Data Retention Utility must be installed.
• The pool type must be Dynamic Provisioning or Dynamic Tiering.

When the access attribute of V-VOL was changed to Protect, if you change the access attribute other than Protect, see Protecting volumes using Data Retention Utility. The setting by the DP-VOL protection function has no connection to the access attribute status of DP-VOL. For example, even if you disabled the DP-VOL protection function to the pool while the Protect attribute was being enabled on DP-VOL, the Protect attribute would still be enabled on DP-VOL.

If you remove the Data Retention Utility feature, the V-VOL protection function settings remain set in the pool but are no longer active. In this case, if you reinstall Data Retention Utility, the protection function settings made before Data Retention Utility was removed are reactivated in the pool.