disks to filesystem co-relation

[FNU Kennedy_2]

Group:

I need a script which would help me to co-relate a disk to its filesystem. (if not logical volume atleast). I get performance monitoring reports for 400 odd disks everyday which are hitting a limit and when I send the reports my users want it to in the form of filesyste. (That is a legitimate request from them). Can someone help me by giving ideas or if there is a ready made one already could you please point me to one.? Thanks in advance.

Kennedy

[Todd McDaniel_1]

here is a small script that shows disk by VG you can modify it to show by LVOL and FS.

# cat vglist.sh
for name in `cat /root/vgnamesEMC.out `
do
echo $name
vgdisplay -v $name |grep "PV Name" |awk '{ print $3 }'
done > /root/disks.by.VG.`date +%m%d%y` 2> /root/vgerr.`
date +%m%d%y`


Must have a control file with the VGs listed called vgnamesEMC.out.

[John Kittel]

what kind of performance report?

if it were for example freespace, used space, etc. - wouldn't it be more natural to start with filesystem and just report that? Since disks can be mirrored, raided, grouped into volume groups, filsystems spread out over several physical disks, single disks with multiple filesystems on them, etc, it seems to me it could be very difficult to start with disk and try to "correlate to filesystem", whatever that would mean.

[Sridhar Bhaskarla]

Hi Kennedy,

This is a small script that I use it on the fly

for PV in $(vgdisplay -v |grep -v Alternate|awk '/PV Name/ {print $3}')
do
LVs=$(pvdisplay -v $PV |printf "%s," $(awk '/current/ {print $3}' |sort|uniq))
LVs=$(echo $LVs|sed 's/,$//g')
echo $PV:$LVs
done

May give out errors if there is a problem with the VGs but should produce the output you need.

-Sri

[Sundar_7]

You can try something like this

for DISK in $(cat /tmp/400-odd-disksreport)
do
LVS=$(pvdisplay -v $DISK | grep "^ */dev/vg" | awk '{print $1}')
echo "$DISK"
echo "$LVS" | xargs -i echo "\t{}"
done

The above loop will display the list of logical volumes that the disk contains.

But remember, a logical volume can span multiple disks.

for DISK in $(cat /tmp/400-odd-disksreport)
do
LVS=$(pvdisplay -v $DISK | grep "^ */dev/vg" | awk '{print $1}')
echo "$DISK"
echo "$LVS" | xargs -n1 bdf
done

The above script excerpt will tell you the filesystems that are on the disk.

-- Sundar