On 5/8/2011 7:37 AM, Todd Cary wrote: > On 5/8/2011 12:03 AM, Ken Smith wrote: >> Todd Cary wrote: >>> I have connected a HD that was a prior system drive (Centos 4.8) >>> and I am not sure of the command line procedures to find out if >>> it is recognized (I believe it is since it present in the GUI), >>> delete all data on it and finally add it to the LVM. >>> >>> I would like to use it as a backup data drive. >>> >>> Todd >>> >>> >> This is an excellent tutorial on LVM. >> >> http://tldp.org/HOWTO/LVM-HOWTO/ >> >> Are you planning to join it to an existing Volume Group and then create >> a LV on it for backup? My preference would be to keep things simple and >> to aid recovery in the future, maybe just format the disk ext3 for >> backup. Then it is easy to plug into another box for recovery. But, I'm >> just guessing how you plan to use it. >> >> Ken >> > Ken - > > Thank you for your response. What you suggested is exactly what > I would like to do: have an extra, stand alone, drive for > backup. However, when I do > > fdisk -l > > I get the output below which has me concerned. As a "Sunday > afternoon" user of Centos, I am not 100% sure of my > interpretation - that is - the drive is already been joined as > part of the LVM even though all I did was to plug it in as a slave. > > My installation of Centos 5.5 is new and I do not remember > specifying LVM (though that is what I had with my 4.8 system). > The /dev/hdc (250 GB) is the new system drive. The /dev/hdd is > the old Centos 4.8 drive that I would like to have as an > independent drive e.g. /dev/hda or whatever it needs to be. > > What I DO NOT want to happen is for me to accidentally mess up my > new Centos 5.5 system :-)!! > > Questions: > > * Is it possible to "remove" /dev/hdd from the LVM - at least it > appears to be part of it > * Once removed, format it as EXT3 and mount it as /dev/hda (or > /dev/hdd) > > For this I am swimming in unknown waters. > > Todd > > Disk /dev/hdc: 251.0 GB, 251000193024 bytes > 255 heads, 63 sectors/track, 30515 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > > Device Boot Start End Blocks Id System > /dev/hdc1 * 1 13 104391 83 Linux > /dev/hdc2 14 30515 245007315 8e Linux LVM > > Disk /dev/hdd: 163.9 GB, 163928604672 bytes > 255 heads, 63 sectors/track, 19929 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > > Device Boot Start End Blocks Id System > /dev/hdd1 * 1 13 104391 83 Linux > /dev/hdd2 14 19929 159975270 8e Linux LVM > > Disk /dev/sda: 81.9 GB, 81964302336 bytes > 255 heads, 63 sectors/track, 9964 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > > Device Boot Start End Blocks Id System > /dev/sda1 1 9964 80035798+ 7 HPFS/NTFS > > Whether I use the lvm command line or the GUI, I am not sure if I am suppose to remove the logical first as in lvm lvremove LogVol01 Using the GUI, I get Logical volume LogVol01 contains swap filesystem. All data on it will be lost! Are you quite certain that you wish to remove logical volume LogVol01? -- Ariste Software Petaluma, CA 94952 http://www.aristesoftware.com