Storage World: February 2012

6. To check the vendor of the SAN disk on a LINUX host

[root@cmptrn-wc-30p ~]# cat /proc/scsi/scsi in RHEL

5 . Find the HBA details of a Solaris machine.

mdu-wc-2p.cable.comcast.com:/# fcinfo hba-port

####################################################

root@ sunserver:/root# fcinfo hba-port | grep WWN

root@ sunserver:/root# fcinfo hba-port

root@ sunserver:/root# prtconf -vp | grep -i wwn

root@ sunserver:/root# prtpicl -v | grep wwn

Run the following command to obtain the physical path to the HBA Ports

    root@ sunserver:/root$ luxadm -e port
    /devices/pci@400/pci@0/pci@9/SUNW,qlc@0/fp@0,0:devctl              CONNECTED
    /devices/pci@400/pci@0/pci@9/SUNW,qlc@0,1/fp@0,0:devctl            NOT CONNECTED

With the physical path obtained from the above command, we can trace the WWN numbers as follows. here I use the physical path to the one that is connected:

    root@ sunserver:/root$ luxadm -e dump_map /devices/pci@400/pci@0/pci@9/SUNW,qlc@0/fp@0,0:devctl
    Pos Port_ID Hard_Addr Port WWN         Node WWN         Type
    0    123456 0         1111111111111111 2222222222222222 0×0 (Disk device)
    1    789123 0         1111111111111111 2222222222222222 0×0 (Disk device)
    2    453789 0         2100001b32xxxxxx 2000001b32xxxxxx 0x1f (Unknown Type,Host Bus Adapter

4 . Find the HBA details of a Linux machine.

[root@obiapp-po-1p tmp]# cat /etc/redhat-release / uname –a

[root@obiapp-po-1p tmp]# lspci | grep -i fibre

On Red Hat Enterprise Linux 5 (5.x)
(X is your device 1,2,3,…N)

[root@obiapp-po-1p tmp]# cat /sys/class/scsi_host/host*/device/fc_host:host*/port_name

[root@obiapp-po-1p tmp]# cat /sys/class/fc_host/host*/port_name

Sample with multiple HBA (Fibre) QLogic

[root@obiapp-po-1p tmp]# # ls /sys/class/fc_host/

host3 host4 host5 host6

[root@obiapp-po-1p tmp]# # cat /sys/class/fc_host/host[3-6]/port_name

0x2100001b32936e24
0x2101001b32b36e24
0x2100001b32932821
0x2101001b32b32821

On Red Hat Enterprise Linux 4 (AS/ES) is on /proc/scsi/qla2xxx/1 (1,2,3,..N)

Sample:
[root@obiapp-po-1p tmp]# # egrep [node|port] /proc/scsi/qlx2xxx/0

scsi-qla0-adapter-node=200000e08b1c19f2;
scsi-qla0-adapter-port=210000e08b1c19f2;

[root@obiapp-po-1p tmp]# systool -c fc_host -v

3 .Extend the FS using LVM method.

[root@obiapp-po-1p tmp]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/RootVolGroup00-lv_root 7.8G 5.2G 2.2G 71% /

/dev/mapper/RootVolGroup00-lv_var 9.7G 790M 8.5G 9% /var

/dev/mapper/RootVolGroup00-lv_opt 20G 17G 2.3G 88% /opt

/dev/sda1 494M 18M 451M 4% /boot

tmpfs 16G 0 16G 0% /dev/shm

tmpfs 4.0K 0 4.0K 0% /dev/vx

/dev/vx/dsk/clstrdg/datavol01 511G 20G 461G 5% /data

[root@obiapp-po-1p tmp]# vgdisplay

--- Volume group ---

VG Name RootVolGroup00

System ID

Format lvm2

====================================

Alloc PE / Size 1344 / 42.00 GB

Free PE / Size 2975 / 92.97 GB

===================================

==================================

[root@obiapp-po-1p tmp]# lvextend –L +20G /dev/RootVolGroup00/lv_opt

Extending logical volume lv_opt to 40.00 GB

Logical volume lv_opt successfully resized

[root@obiapp-po-1p tmp]# resize2fs /dev/RootVolGroup00/lv_opt

resize2fs 1.39 (29-May-2006)

Filesystem at /dev/RootVolGroup00/lv_opt is mounted on /opt; on-line resizing required

Performing an on-line resize of /dev/RootVolGroup00/lv_opt to 10485760 (4k) blocks.

The filesystem on /dev/RootVolGroup00/lv_opt is now 10485760 blocks long.

[root@obiapp-po-1p tmp]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/RootVolGroup00-lv_root 7.8G 5.2G 2.2G 71% /

/dev/mapper/RootVolGroup00-lv_var 9.7G 790M 8.5G 9% /var

/dev/mapper/RootVolGroup00-lv_opt 39G 17G 21G 44% /opt

/dev/sda1 494M 18M 451M 4% /boot

tmpfs 16G 0 16G 0% /dev/shm

tmpfs 4.0K 0 4.0K 0% /dev/vx

/dev/vx/dsk/clstrdg/datavol01 511G 20G 461G 5% /data

[root@obiapp-po-1p tmp]#

2 .Create the FS using LVM method (Through script)

[root@cmptrn-wc-31p home]# cat lvm_unix

pvcreate /dev/sdam

pvcreate /dev/sdan

pvcreate /dev/sdal

pvcreate /dev/sdai

pvcreate /dev/sdah

pvcreate /dev/sdag

pvcreate /dev/sdaf

sleep 3

vgextend RootVolGroup00 /dev/sdam /dev/sdan /dev/sdal /dev/sdai /dev/sdah /dev/sdag /dev/sdaf

sleep2

lvcreate -L 20G /dev/RootVolGroup00 -n lv_home_uc4

lvcreate -L 250G /dev/RootVolGroup00 -n lv_var_archive

lvcreate -L 20G /dev/RootVolGroup00 -n lv_var_cemp

lvcreate -L 150G /dev/RootVolGroup00 -n lv_var_cemp_data1

lvcreate -L 150G /dev/RootVolGroup00 -n lv_var_cemp_data2

lvcreate -L 100G /dev/RootVolGroup00 -n lv_var_cemp_logs

sleep2

mkfs -t ext3 /dev/RootVolGroup00/lv_home_uc4

mkfs -t ext3 /dev/RootVolGroup00/lv_var_archive

mkfs -t ext3 /dev/RootVolGroup00/lv_var_cemp

mkfs -t ext3 /dev/RootVolGroup00/lv_var_cemp_data1

mkfs -t ext3 /dev/RootVolGroup00/lv_var_cemp_data2

mkfs -t ext3 /dev/RootVolGroup00/lv_var_cemp_logs

sleep5

mkdir /home/uc4

mkdir /var/cemp

mkdir /var/cemp/data1

mkdir /var/cemp/data2

mkdir /var/cemp/logs

mkdir /var/archive

[root@cmptrn-wc-31p home]# sh -x lvm_unix

1. Create the FS using LVM method.

1. From fdisk –l identify the disk you need to add to the FS

2. pvcreate /dev/sdai [pvcreate initializes PhysicalVolume for later use by the Logical Volume Manager (LVM). Each PhysicalVolume can be a disk partition, whole disk, meta device, or loopback file)

3. vgextend RootVolGroup00 /dev/sdai -It would extend the volume group with the new disk

4. vgdisplay RootVolGroup00 verify the volume group size again

5. lvcreate -L 50G /dev/RootVolGroup00 -n lv_home_cemp Create a logical volume under the volume group

6. lvdisplay /dev/RootVolGroup00/lv_home_cemp verify the new logical volume created

7. mkfs -t ext3 /dev/RootVolGroup00/lv_home_cemp Format the FS in ext3

8. mount /dev/RootVolGroup00/lv_home_cemp /home/cemp Mount the FS in a mountpoint

9. cat /etc/fstab

9. cp -p fstab fstab.bkp.01022012 Taking backup of fstab

10 . vi /etc/fstab Edit the file for the new Mount points

11. echo " command " >> /etc/fstab ( to append a command)

Eg : echo "/dev/RootVolGroup00/lv_home_nagios /home/nagios ext3 defaults 1 2" >> /etc/fstab

12. df –k Verify the new FS