[linux-lvm] [Linux-lvm] Need help in understanding the logical to
Alheid, Gregory
alheidgj at upmc.edu
Fri Mar 2 14:47:30 UTC 2012
> . . . I want to see the entire sequence of address translation from
> a logical address given by the application to the physical address . . .
Don't do any RAID5 since it is done in hardware . . .
But running "lvdisplay -m <a_vg>" does give a mapping
of logical volume extents to physical extents
# echo ; lvdisplay -m datavg |
egrep "LV Name|Logical extent|Physical [volume|extents]"
LV Name /dev/datavg/u01
Logical extent 0 to 5119:
Physical volume /dev/sdb
Physical extents 0 to 5119
LV Name /dev/datavg/u02
Logical extent 0 to 1279:
Physical volume /dev/sdb
Physical extents 5120 to 6399
LV Name /dev/datavg/arch01
Logical extent 0 to 9982:
Physical volume /dev/sdb
Physical extents 6400 to 16382
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