On Wednesday 14 March 2012 11.50.37 Philippe Naudin wrote: > Thanks all for your answers. > > Actually, my problem concern lvm, not mkswap. No, afaict there's nothing wrong with your lvm. The only problem I see is that mkswap prints our an incorrect or at least pointless warning. I can confirm that mkswap on an lv on one of my test machines also says "warning: don't erase bootbits...". It also says this when running against a file full of zeroes... Regarding fdisks complaints about "doesn't contain a valid partition table...", this is normal (and may be considered a bug in the "-l" option, it could have excluded lvm-devices from its list...). If you want to get to the bottom of this I suspect the easiest way is to look at the mkswap source code (under which circumstances it prints that message). /Peter -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 198 bytes Desc: This is a digitally signed message part. URL: <http://lists.centos.org/pipermail/centos/attachments/20120314/1674967c/attachment-0005.sig>