hey evry one, i have installed solaris by vmware and after installation when iam using format command iam not able to use any of my partion its displayng lyk all the partions are mounted

Where did you try to format a partition? Under Solaris in the VM? During creation of the new VM in VMware, what type of harddisk have you chosen, hopefully not physical harddrive. Please send a reply, if you solved the problem !!!

i have taken default partions while installing solaris under vmware

Have you already checked for available partitions with fdisk -l Then you can use mount to check, which of the available partitions are mounted by using mount If you want to format an already mounted partition, you need to unmount it first by using umount /mountpoint_of_partition Please send a reply, if you solved the problem !!!

yaa even when iam umounting the file system and going for formating of disks then its is showing "this disk has mouted partions you cannot label it" this is the message been dispalyed

Have you crosschecked, whether there is something mounted, e.g. a directory of that partition via mount after you've unmounted the primary mountpoint of that disk. Or could you post which partition of which disk should be formated and post the output of fdisk -l and mount. This would make it easier for me to figure out, what't going on at your machine. Please send a reply, if you solved the problem !!!