Hi,
I've just been playing with the multipath dm target, and would like to
create a single device mapper device consisting of several,
concatenated, multipathed devices. The intuitive way to do this would be:
# HBA 2 failing to 3
0 286749488 multipath 2 round-robin 1 0 /dev/sdd round-robin 1 0 /dev/sdl
286749488 286749488 multipath 2 round-robin 1 0 /dev/sde round-robin 1 0
/dev/sdm
573498976 286749488 multipath 2 round-robin 1 0 /dev/sdf round-robin 1 0
/dev/sdn
<snip>
However, when one tries to set up such a device, we get the error message:
kernel: device-mapper: device /dev/sde too small for target
I would have assumed that the mapping specified above would map the
whole (sector range 0-286749487) of the sde/sdm device into the range
286749488-573498975 of the dm device. However, dm appears to be trying
to map the range 286749488-573498975 of the dm device to the same
offsets in the sde/sdm device.
Is this what was intended?
Cheers,
Tim
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