[CentOS] raid on large disks?
John R Pierce
pierce at hogranch.comWed Oct 12 16:55:01 UTC 2011
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On 10/12/11 9:36 AM, Les Mikesell wrote: > LVM seems unnecessarily complicated unless mdraid is broken on large > devices. And I already have data on the md partition (moving stuff > from a pair of 1.5TB drives to 3TB). If md isn't going to work, can I > put LVM on a single drive, add the data, then add the mirror (reusing > the one that now has the md partition and currently holding the data)? > The old disks are still around but not in the machine now. I believe (from memory) you'd add the 2nd drive to the volume group, then vgextend vgname /dev/(newdisk) lvconvert -m 1 logicalvolumename one nice thing about lvm mirroring is you can do it with a mix of drive sizes without having to worry about geometry or layout, it will simply ensure that each block exists on two devices.... -- john r pierce N 37, W 122 santa cruz ca mid-left coast
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