Convert LV to striped: Difference between revisions
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(Created page with "= Convert LV to striped = to convert an lv from the usual linear to striped mode directly is not possible. It needs two steps: create a striped (old style) mirror lv and then...") |
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To convert an lv from the usual linear to striped mode directly is not possible. It needs two steps: create a striped (old style) mirror lv and then remove the original pv from the mirror. | |||
Given you have a vg vgdata with pv sdb and lv lvdata | Given you have a vg vgdata with pv sdb and lv lvdata | ||
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Check the result with | Check the result with | ||
lvdisplay --maps --all /dev/vgdata/lvdata | |||
Latest revision as of 00:42, 6 March 2017
To convert an lv from the usual linear to striped mode directly is not possible. It needs two steps: create a striped (old style) mirror lv and then remove the original pv from the mirror.
Given you have a vg vgdata with pv sdb and lv lvdata
First extend the vg with a new pv for each stripe, e.g. sdc and sdd for 2 stripes (pvcreate them first)
vgextend vgdata /dev/sdc /dev/sdd
If you want to reuse sdb as a stripe pv you'd have to move the data to one of the new pv's now
pvmove -n /dev/vgdata/lvdata /dev/sdb /dev/sdd
Next mirror the lv to the striped pv's
lvconvert --type mirror --corelog --mirrors 1 --stripes 2 /dev/vgdata/lvdata
Finally remove the linear part (sdb, or sdd if you pvmoved above) from the mirror lv
lvconvert --mirrors 0 /dev/vgdata/lvdata /dev/sdb
Check the result with
lvdisplay --maps --all /dev/vgdata/lvdata