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Hi, I have created the following number LUNs
and presented to the hosts. Qlogic - FCA2214, A6826A, A7538A, driver 8.01.03 EVA GL3 - 4 luns EVA XL - 11 luns EVA GL4 - 10 luns XP12k - 24 luns XP128 - 14 luns On my SLES9 SP3 hosts, the OS see all the above luns.
multipath.conf blacklisted the 4 GL3 luns. If starting of with blank
/dev/mapper directory and boot up the server, 59 dm mapping will be created in
the /dev/mapper and this is all good. Let say I created 2 partitions on
each above luns (except the GL3 luns) and reboot the host, the host will hang
during boot in middle of mapping or shortly after mapping. Disconnect the
host from SAN and let it reboot again. Noticed dm mapping is also created
for partitions. Delete partitions on some luns, clean out /dev/mapper
directory and repeat the boot up process. Somewhere around 95 or less
mapping, the host will boot up fine. Let me know if there are any limitations on number of DM
devnodes created for LUNS and partitions? If not any other thoughts will
be greatly helpful. PS: I need to still validate the same on
RHEL4 host. Thanks and regards |
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