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:
VxVM does not shred a disk that is in use by VxVM on this system or in a shared disk group.
VxVM does not currently support shredding of thin-reclaimable LUNs. If you attempt to start the shred operation on a thin-reclaimable disk, VxVM displays a warning message and skips the disk.
Symantec does not recommend shredding solid state drives (SSDs). To shred SSD devices, use the shred operation with the force (-f) option.
See About shredding data.
Caution: |
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
# /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.
# /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
# vxtask list TASKID PTID TYPE/STATE PCT PROGRESS 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.