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Go Back   Linux Archive > Redhat > Device-mapper Development

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Old 04-14-2011, 09:06 AM
"Eli Malul"
Default creating a cascaded linear devices fails

I do not understand why creating a linear device and then trying to create another linear device on top of it fails.

1.****** Creating a linear device over loop1:
dmsetup create linear_loop1 /tmp/linear_loop1

cat /tmp/linear_loop1
0 1000 linear /dev/loop1 0

2.****** Then creating another linear device over this linear device:
dmsetup create linear_loop2 /tmp/linear_loop2

device-mapper: reload ioctl failed: Invalid argument
Command failed

cat /tmp/klinear_loop2
0 1000 linear /dev/linear_loop1 0
Could you please explain what am I doing wrong?
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