LUN (VLL) and Volume Shredder User Guide (T5214-96094, November 2011)

Therefore, HP recommends that you overwrite a volume at least three times using dummy data.

The default setting of Volume Shredder defines three times of overwriting using dummy data. If you

change the setting, you can overwrite the volume up to eight times. For details on the setting of

Volume Shredder, see “Defining the Shredding Settings” (page 81).

You can use the shredding function regardless of the kinds of volumes (for example, VDEV, LDEV,

or CV) and the emulation types, but the status of the volumes must be Blocked. If the status of a

volume is Normal, the volume cannot be the target of the shredding function in the Customized

Volume window. For details on how to change the status of the volume to Blocked, see “Preparing

to Use Volume Shredder” (page 21).

You cannot perform shredding on the following volumes:

• Pool volumes (pool-VOLs)

• HP XP Snapshot Software virtual volumes (V-VOLs)

• Journal volumes

• Volumes whose access attribute is not Read/Write

• Quorum disks

For details on how to execute the shredding function, see “Deleting the Data in the Target Volume”

(page 82).

Figure 5 Overview of the Shredding Function

20 About Virtual LVI/LUN and Volume Shredder