PVS output not showing drive

I had created physical volume earlier i.e. /backup, /ndasdb, /processor, /latro. Don't know what exactly happened, but /ndasdb is not showing in any of this output result: Pvdisplay, Vgdisplay, and lvdisplay. rest 3 are showing. I can see the lun in multipath -ll (ndasdb is there) I tried to recreate it with pvcreate /dev/mapper/ndasdb but its gives me this error: WARNING: gfs2 signature detected on /dev/mapper/ndasdb at offset 65536. Wipe it? [y/n]: n Aborted wiping of gfs2. 1 existing signature left on the device. Is it true if I do yes it will delete my all data? Is there anyway to bring my drive back without loosing any data?