Parm Patram

1) Open 2 sessions to a server that will be having the new disks added as root

2) Run the command    /opt/netapp/santools/ql-dynamic-tgt-lun-disc.sh

i.      Answer yes to the I/O question

3) Run the command    sanlun lun show –p > /tmp/sanout#, where # is a date or new instance that does not exist yet

4) In one of the open shell sessions, use vi to open the /tmp/sanout# file, and search for the LUN name that is being added. In this example, data16 is the new disk. (red #1)

5) In the second shell session, edit /etc/multipath.conf with the WWN found in the previous step and add the name of the LUN as the alias. This sets up persistent bindings.

( blue #2)

6) set up multipath to understand the new additions

- Run the command “ multipath –F” to clear the current settings

- Run the command “ multipath “ to re-establish the setup

This will give output showing new paths created

-         Verify with “ multipath –ll | grep < new LUN name>

7) Verify disk is available

Run the command “ls –l /dev/mapper | grep <new LUN name>”

verify that persistence is working

Run the command “ sanlun lun show –p | grep <new LUN name> “

The disk is now available.

If the disk is needed as a standard mount, then add the /dev/mapper/<diskname> entry to /etc/fstab , mount , and test.

RAW DEVICES for ORACLE

If the disk is needed as an oracle raw device, then several more edits are needed.

1) edit /etc/sysconfig/rawdevices with the following format. The raw device will be the next number in sequence.

2)      edit /etc/rc.local

Oracle user and DBA group will need to own these raw devices

Add the chown and chmod lines to /etc/rc.local

chmod 775 /dev/raw/raw#

chown orcle:dba /dev/raw/raw#

3)      restart the raw devices service

# service rawdevices restart

4)      run /etc/rc.local

cd /etc/ and run the command “ ./rc.local “

select name, (usable_file_mb/total_mb)*100 percent_free from V$ASM_DISKGROUP_STAT;

To grow an existing LUN on a system:
1. Grow the LUN size on NetApp filer
a. Grow volume to desired size. Ex – vol size [volume-name +size]
b. Grow lun to desired size. Ex – lun resize [lun name new lun size]

2. On the linux host, use the Qlogic target scan utility to
scan for the newly re-sized LUN
cd /opt/QLogic_Corporation/ql-dynamic-tgt-lun-disc-2.5
./ql-dynamic-tgt-lun-disc.sh                # answer yes to scan

3. Verify the LUN has a new size:
sanlun lun show
fdisk -l        (May not show the new size, it’s ok)

4. To make sure the LUN is present and in good condition

vxdctl enable
vxdisk list                        # verify the presence of the disk

5. Expand the LUN dynamically in Veritas
vxdisk -g testdg resize FAS30701_0
where FAS30701_0 is the LUN with a new size

6. Verify newly available size (assume previously usable size is known)

vxassist -g testdg -U fsgen maxgrow “volume” layout=concat testdg-1
Compare with the previous known size

7. Grow the volume and FS (FS must be mounted)
vxresize -F vxfs -g testdg testvol1 ####m

ex: vxresize -F vxfs -g itdqa itdqa-vol5 20447m
or
vxresize –F vxfs –g itdqa itdqa-vol5 41875456

To shrink a disk
1.        vxresize -F vxfs -g rpmprd rpmprd-vol2 130023424
** The total is determined from the previous size before space was         added.

Add the IP address if you know what it is:
ifconfig bond0:# 10.###.###.### netmask 255.255.252.0 up

for mac in `ifconfig | grep bond| awk '{print $5}'`;
do
  echo;
  echo "Checking interfaces bound to MAC: $mac ...";
  for interface in `ifconfig | grep $mac | grep -v ^bond | awk '{print $1}'`;
  do
    echo -n "$interface: "; ethtool $interface | grep Link; echo;
  done;
done

will display result similar to:

Checking interfaces bound to MAC: 00:0D:60:98:16:38 …
eth0:   Link detected: yes

eth2:   Link detected: yes

Checking interfaces bound to MAC: 00:0D:60:98:16:39 …
eth1:   Link detected: yes

eth3:   Link detected: yes

http://nfs.sourceforge.net/nfs-howto/ar01s05.html

echo “wallyq” | passwd –stdin joeuser

will set the password non-interactively.