Dear Friends of CentOS, I read a reply by John R Pierce, Re: [CentOS] LVM change disk December 04, 2010 01:30PM "do you realize that if any one of those 4 miscellaneous drives fails, you lose the whole volume?" Can anyone confirm this? and thank you to John above. 2: can you add(extend) a physical hdd with data to a LV without losing the data? 3: can you remove one hdd to add another of same size and file system but with different data? Thanks much. i am about to install and need to know my constraints.