[linux-lvm] Questions about residual data in LVM after delete the Logic Volume
afe.young at gmail.com
Thu Nov 26 08:20:33 UTC 2015
This is my LVM version
stack at DevStackOSDomU:~$ sudo lvm version
> LVM version: 2.02.98(2) (2012-10-15)
> Library version: 1.02.77 (2012-10-15)
> Driver version: 4.27.0
I created a 1GB physical volume with a block device setup by losetup, and
added it to my volume group.
Then I created a 1GB logic volume A and I can find my block device
I mount this Logic volume and write some data containing a string PATTERN
Then I grep the block device with `sudo grep -zbl PATTERN
and It really have found the string PATTERN
Then I deleted this 1GB logic volume A and created another 1GB logic
I expected the residual data containing string PATTERN should appear in
the 1GB logic volume B, because they both used all the same 1GB physical
However, when I grep the 1GB logic volume B's block device directly, it
*So Here comes the quesions,*
Does LVM have any mechanism to prevent the residual data in the previously
deleted logical volume from appearing in the new logical volume?
If there is any, how can I config it? How does it work , where can I find
the related docs?
Thanks in advances :)
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the linux-lvm