On 07/01/19 10:46, Dale wrote: > From what I've read, that can be overcome. If you get say a SMART > message that a drive is failing,
Yup, I have to agree that SMART isn't always reliable, but if you *monitor* it, it should give plenty of warning of the recording medium failing ... > just remove that drive or remove the > whole LVM setup and use something else until a working drive setup can > be made. Once ready, then move the data, if the drive still works, to > the new drive. That is basically what I did when I swapped a smaller > drive for a larger one. I moved the data from one drive to another. It > did it fairly quickly. Someone posted that it may even be faster to do > it with LVM's pvmove than it is with cp or rsync. I don't know how true > that is but from what I've read, it moves the data really efficiently. Point is, it works at a different level. Both cp and rsync are NOT guaranteed to copy your filesystem accurately - mine is full of hard links and that will give both those two a hard and nasty time. LVM copies the block device underneath the file system, so it is less efficient in that it will copy 3GB if you have a 3GB partition, but it is far simpler in that it neither knows nor cares what the file system is doing at the next level up. Give a file-system like mine to "cp -a" and it'll bring the system to its knees trying to keep track of where everything is. Cheers, Wol
