Solaris

You do not need to manually trash anything. Swap does not care about any pre-existing data.

Hi MadeinGermany,

Thanks for your reply. Seeing the word trash make me curious.
How do you trash a filesystem ? What do you guys mean by trash ?

Regards,
Noob

To be 100% sure there is no risk, you should temporarily remove it as a swap device before wiping it.

Code:

swap -d /dev/md/dsk/50 && { dd if=/dev/zero of=/dev/md/dsk/50 bs=128k count=10 ; swap -a /dev/md/dsk/50 ; }

The key thing here is that if you created a UFS filesystem, mounted it, maybe put some files in it, maybe removed some or all of those files, and then decide to use that partition as swap space; you MUST unmount that UFS filesystem before declaring that partition to be swap space. And, after telling the OS it can use that partition as swap space, you MUST assume that that partition can never be mounted as a filesystem again until you tell the OS it can no longer use that partition as swap space AND you use something like newfs to create a new filesystem on that partition before you mount it as a filesystem again.