lvmtab can't tell alternate link

[zhaogui]

Is it true that the sequence order of disk files for each VG in `strings /etc/lvmtab` does not tell you which one is primary path and which one is alternate link, the only way to do this is running "vgdisplay -v"

[Justo Exposito · Accepted solution]

Hi,

Yes, it is.
When you do a strings lvmtab the first is the primary and the second is the alternate.

In order to see clear you must to use vgdisplay -v.

Regards,

Justo.

[U.SivaKumar_2]

Hi,
it is false.
order in /etc/lvmtab really matters. Even vgdisplay will report on the basis of order of
links in /etc/lvmtab.

regards,
U.SivaKumar

[Justo Exposito]

Hi,

If you want to change the primary and alternate, you can do it online by:

Changing PV Link order
To make an alternate link become the primary link (manual switch) use pvchange:
# pvchange -s
To change it permanently (across VG deacivation) you have to change the order in
/etc/lvmtab:
# vgreduce vg01
Device file path "/dev/dsk/c0t1d0" is a primary link. Removing
primary link and switching to an alternate link.
# vgextend vg01

Regards,

Justo.

[Juan Manuel López]

to update the lvmtab file, use " vgscan " command.

I hope this help you.

Juanma.