On 05.11.2010 13:44, Roger Evans wrote:
When I execute the command:
echo 0.0.0400,0.0.0401>/sys/bus/ccwgroup/drivers/ctcmpc/group
as per instructions from the device drivers, Features and Commands
manual, i get an error message. Like this:
LNXCCL:/etc/rc.d # echo 0.0.0400,0.0.0401
/sys/bus/ccwgroup/drivers/ctcmpc/group
-bash: echo: write error: Invalid argument
Possible reasons for this error:
1. devices 400 and 401 are not recognizes by Linux
2. devices are of different type
3. devices are already grouped
For 1 and 2 see the output of the lscss command. If the device doesn't
show up, make sure they are correctly attached to your z/VM guest/LPAR.
For 3 see if a directory named 0.0.0400 exists in
/sys/bus/ccwgroup/devices. If so, set it offline and ungroup it.
Regards,
Peter Oberparleiter
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