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Home > Forums > MIS/IT > Operating Systems - UNIX based > Linux (server) Forum

OEL/redhat lvmdiskscan question

thread54-1676941
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dandan123 (TechnicalUser)
5 Mar 12 13:04
I have a oel server on which we have san storage.

I'm using lvmdiskscan to see the drives.

Initially the storage up shows up with wwn numbers like this -

/dev/mpath/yyyy0097000019260314853303030xxx

After adding an alias to /etc/multipath.conf


 multipath {
                wwid yyyy0097000019260314853303030xxx
                alias ASM_DISK1

The disk appears as ASM_DISK1 after a reboot.

Is there any way to make lvmdiskscan show the alias without a reboot ?
 
Annihilannic (MIS)
5 Mar 12 23:18
Are the old /dev/mpath entries still present?  Does the multipath bindings file contain both the old and new aliases, or just the new ones?

(I'm not suggesting you remove them at this stage as I'm not sure what the impact may be...)

Annihilannic
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dandan123 (TechnicalUser)
7 Mar 12 17:05
/dev/mpath has the wwn listing not the alias listing.

The /var/lib/multipath/bindings file seems to have a partial listing of the drives in wwn format.
Annihilannic (MIS)
13 Mar 12 19:38
Does a service multipathd restart make any difference?

Annihilannic
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dandan123 (TechnicalUser)
13 Mar 12 19:59
tried that several times..doesn't make a difference.
Annihilannic (MIS)
13 Mar 12 20:50
Hmm... perhaps it needs to be done at the device-mapper layer... try dmsetup remove on the devices in question perhaps and then restart multipathd again?

(more wild guessing winky smile )

Annihilannic
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