When an LVM is created, the following error occurs: Can't initialize physical volume & quot;/dev/ccis.

When an LVM is created, the following error occurs: Can't initialize physical volume "/dev/cciss/c0d1p1" of volume group "VolGroup01" without-ff solution 1. problem description on a Linux Server (CentOS5.8) when creating an LVM on a physical disk/dev/cciss/c0d1, run sudo fdisk-l sudo fdisk/dev/cciss/c0d1 p n p 1 w and then run sudo pvcreate/dev/cciss /c0d1p1 error: can't initialize physical volume "/dev/cciss/c0d1p1" of volume group "VolGroup01" without-ff 2. after checking the cause of the problem, we learned that LVM:/dev/VolGroup01/LogVol00 was created according to the general process, but not Unmount. 3. solution: unmount logical volumes and volume groups in sequence (you must detach physical volumes if necessary ): sudo lvremove/dev/VolGroup01/LogVol00 sudo vgremove VolGroup01 is successfully uninstalled and then sudo pvcreate/dev/cciss/c0d1p1 is re-executed. No error occurs. Then, execute subsequent actions to create LVM.