In the answers below I've taken 'one linear volume group' to actually mean 'one linear volume using all the space in the volume group'. If this is not what you meant, can you please describe your setup? > 1. If one hard disk fails (hardware) do I loose all the data stored on > the VG? I'm not sure where you searched, but the answer to this is a fundamental characteristic of RAID0 - there is no redundancy. If you have a concat (rather than a stripe), then you /might/ be able to salvage /some/ data - but the chances are pretty slim that you'll get anything sane back out of it, and you're going to have to do some relatively low level stuff to do even that I would have thought. > 2. Can I add a new hard disk in the VG without having to format it > before? (I mean if it is full of data can I just add it?) Not easily using LVM on linux, no. If it already has partitions on it, then the layout of the data on the drive is incorrect for LVM. There may be tools out there to overlay the required metadata, but the underlying partitions will have to reduce in size, so this would require the filesystems to support being shrunk. > 3. In case of failure can I recover the data from a single disk on > another box? What sort of failure? Any VG that has enough drives to provide you with a working volume group/volume can be imported to another machine and read. So if you have 3 volumes over the VG, and only one of them doesn't have a complete set of blocks on it - the other 2 can be salvaged. In the case of the arrangement you're talking about, no. If you need to be able to recover the data, then a simple linear volume (with no redundancy) is not a good idea. (In answer to the subject line, 'with the arrangement you're talking about' - YES') _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
