Shredding a VxVM disk

When you decommission a Veritas Volume Manager (VxVM) disk that contains sensitive data, VxVM provides the ability to shred the data on the disk.

Note the following requirements:

See About shredding data.


All data on the disk will be lost when you shred the disk. Make sure that the information has been backed up onto another storage medium and verified, or that it is no longer needed.

To shred a VxVM disk

  1. To shred the disk:
    # /etc/vx/bin/vxdiskunsetup [-Cf] -o shred[=1|3|7] disk...


    The force option (-f) permits you to shred Solid State Drives (SSDs).

    1, 3 and 7 are the shred options corresponding to the number of passes. The default number of passes is 1.

    disk... represents one or more disk names. If you specify multiple disk names, the vxdiskunsetup command processes them sequentially, one at a time.

    For example:

    # /etc/vx/bin/vxdiskunsetup -o shred=3 hds9970v0_14
    disk_shred: Shredding disk hds9970v0_14 with type 3 
    disk_shred: Disk raw size 2097807360 bytes
    disk_shred: Writing 32010 (65536 byte size) pages and 0 bytes 
    to disk
    disk_shred: Wipe Pass 0: Pattern 0x3e
    disk_shred: Wipe Pass 1: Pattern 0xca 
    disk_shred: Wipe Pass 2: Pattern 0xe2
    disk_shred: Shred passed random verify of 131072 bytes at 
    offset 160903168

    The vxdiskunsetup shred command sets up a new task.

  2. You can monitor the progress of the shred operation with the vxtask command.

    For example:

    # vxtask list
       203   -  DISKSHRED/R 90.16% 0/12291840/11081728 DISKSHRED 
    nodg nodg

    You can pause, abort, or resume the shred task. You cannot throttle the shred task.

    See vxtask(1m)