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тАО05-27-2010 12:13 AM
тАО05-27-2010 12:13 AM
EMC LUN presented to RHEL 5.3
I have a rhel 5.3 64 bit linux server with vg00. Now we presented 6 LUNs to this from EMC storage. powermt display dev=all shows me the paths but can anyone help me to configure these disks on an LVM. How do we do pvcreate or on which path we have to. Please clarify me on this. I am attaching the output of powermt here with.
1. pvcreate on what path ???
2. how do we see the same from RHEL
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тАО05-27-2010 12:42 AM
тАО05-27-2010 12:42 AM
Re: EMC LUN presented to RHEL 5.3
you have to configure with Pseudo names.
like
pvcreate /dev/emcpowerf
pvcreate /dev/emcpowere
Gudluck
Prasanth
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тАО05-27-2010 07:09 AM
тАО05-27-2010 07:09 AM
Re: EMC LUN presented to RHEL 5.3
I strongly suggest you add the following filter line to /etc/lvm.conf so LVM uses the emcpower devices instead of sd*.
Make sure you comment out any existing "filter" lines.
filter = [ "a|^/dev/emcpower[a-z]*|","a|^/dev/cciss/.*|","r/.*/" ]
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тАО05-30-2010 09:11 AM
тАО05-30-2010 09:11 AM
Re: EMC LUN presented to RHEL 5.3
I created the vg as said....but when I do a vgdisplay -v vg01, it shows me the the /dev/sdX path of the disk instead of /dev/emcpowerX . I did pvcreate/vgcreate on /dev/emcpowerX device file only. Pls assist.
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тАО05-31-2010 12:10 AM
тАО05-31-2010 12:10 AM
Re: EMC LUN presented to RHEL 5.3
1.) In the "devices {" group near the beginning of the lvm.conf file, there is a line:
preferred_names = [ ]
Comment out the default line, and write in a custom filter instead. The result should look like this:
# preferred_names = [ ]
preferred_names = [ "^/dev/emcpower", "^/dev/mapper/", "^/dev/mapper/mpath", "/dev/[hs]d" ]
This will cause the LVM to prefer the EMC devices if it sees more than one PV with the same PV identifier (= the same LUN through different paths).
2.) Gerardo's filter line can achieve the same effect, but it assumes you are running on a Proliant system and have your vg00 on a SmartArray controller.
MK
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тАО01-04-2011 10:52 PM
тАО01-04-2011 10:52 PM