topic Re: get volume status function in Operating System - Linux

get volume status function

anat heilper — Thu, 01 Nov 2007 02:19:51 GMT

Hi,
I'm trying to find a function(like lvdisplay, but through C code) that get the status of a device ( volume), weather it is online/offline according to it's major and minor number. Is there such functions?
Thaks,
anat

Re: get volume status function

Ivan Ferreira — Thu, 01 Nov 2007 06:50:27 GMT

Maybe your best option is to check the lvdisplay/lvs source code. This is why the open source world is too great.

Cheers.

Re: get volume status function

Stuart Browne — Thu, 01 Nov 2007 07:16:38 GMT

That, or you could start with an 'strace lvdisplay /dev//', and see if that gives you any clues.

..

unfortunately, my test box at home which has LVM is LVM 1, so it's rather different.. All my LVM2 boxes aren't using LVM.. Go figure.. ;)

Re: get volume status function

rajdev — Sun, 04 Nov 2007 07:51:08 GMT

Hi,

I am not sure what you are actually looking, but there is a pstat interface which can give you a lot of status information on processes,disk,lv,memory etc.

see the following for details :
man pstat
/usr/include/sys/pstat.h
/usr/include/sys/pstat/*
pstat_getlv
pstat_getdisk

Regards,
RD

Re: get volume status function

anat heilper — Mon, 05 Nov 2007 14:05:04 GMT

Hi, on linux i don't see no man entry for pstat nor the include files that you mentioned

Re: get volume status function

Vitaly Karasik_1 — Tue, 06 Nov 2007 04:36:41 GMT

Shalom, Anat,

AFAIK, pstat is HP-UX specific utility.

As for your question - I suggest you to ask it on some LVM forum/maillist, see for more info http://www.ibm.com/developerworks/library/l-lvm2/?ca=dgr-lnxw02aLinuxLVM2&S_TACT=105AG