HP StorageWorks D2700 DAS - adding spare disk

HP StorageWorks D2700 DAS - How to add spare disk



1.  Login to the server and go to the HP Array configuration utility.
      Select the "SAS Array" for which we have add the spare disk.
      Here we have selected the "SAS Array B".'
   
      Then click on the "Spare Management" button shown on the right side of the window.

2.  Select the disk from "Unassigned Drives" group and click save.
      Here we are adding 1 spare disk. So selected the disk in Bay 10 and click "save" button to assign it as spare disk for the "SAS Array B".

3.  Now can see the disk is assigned as a spare disk for the "SAS Array B".

Create LVM on CentOS / RHEL 5.8

How to add 3 new external hdds and create LVM on it.

steps required to configure LVM include:

• Creating physical volumes from the hard drives.
• Creating volume groups from the physical volumes.
• Creating logical volumes from the volume groups and assign the logical volumes mount points

In this case external hdds connected to the server as /dev/sdc, /dev/sdd, /dev/sde

[ The command fdisk -l  will show the hdds connected to the server ]

1. Create a partition on the hdd and change file system to 8e (LVM )

Note:- This is a destructive process, and make sure that any data in the hdd is backed up before proceeding. 

  a) fdisk /dev/sdc

  b) enter "n" to create partition,

         enter "1" to create primary partition

         select start and end as default (just press enter at both prompts )

  c) enter "t" to change the file system type and enter '8e' for LVM

  d) enter "w" to save the changes

  e) enter "q" to exit

2)  Create Physical volume

3) Create Volume group from the Physical volumes create

    Here I am creating a Volume group  "DB_TEST_EXTERNAL"

4) Create Logical Volume from the Volume group

     Here I am creating a Logical Volume named "LV_DATA"




5)  Create filesystem on the share

 mkfs.ext3 /dev/DB_TEST_EXTERNAL/LV_DATA

Postfix mailserver

1) How to display the mailqueue

•   mailq

•  postqueue -p

2)  Delete mails from the mail queue

   Delete all the pending mails from the mail queue

   postsuper -d ALL

   To delete only the deferred mail from the mail queue

   postsuper -d ALL deferred

VMware ESXi 5.x - to mount a netapp NFS share from ESXi command prompt

VMware ESXi 5.x - to mount a netapp NFS share from ESXi command prompt 

1)   To list the current NFS mounts on the server

esxcli storage nfs list

2) Command to mount the a Netapp NFS share 

       volume name : /vol/v2tc_x1/qtc_x1/
       hostname :  remotehost.domain.com
       mount folder name:  DataStore_Name

 esxcli storage nfs add -H remotehost.domain.com  -s /vol/v2tc_x1/qtc_x1/ -v DataStore_Name

3) To remove the NFS mount

esxcli storage nfs remove -v DataStore_Name

Find HBA WWPN in RHEL / CentOS 5.x

Find HBA WWPN in RHEL / CentOS 5.X

Method1:

1) Run the following command to find the manufacturer of the HBA card


[root@host ~]# lspci |grep -i HBA
07:00.0 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)
0a:00.0 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)

2) To find the WWPN number use the following command and look for port_name

 systool -c fc_host -v

[root@host ~]# systool -c fc_host -v |grep "port_name"
    port_name           = "0x500XXXXXXXXXXX7e"
    port_name           = "0x500XXXXXXXXXXX4a"


Method2:

[root@host ~]# cat /sys/class/scsi_host/host1/device/fc_host\:host1/port_name
0x500XXXXXXXXXXX7e
[root@host~]# cat /sys/class/scsi_host/host0/device/fc_host\:host0/port_name
0x500XXXXXXXXXXX4a

Change multipathing policy to RoundRobin on ESXi 5.x

1.       Select an ESXi host you want to modify, and click the Configuration tab.
2.       Click Storage.
3.       Select a datastore or mapped LUN.
4.       Click Properties.
5.       In the Properties dialog, select the desired extent, if necessary.
6.       Click Extent Device > Manage Paths and obtain the paths in the Manage Path dialog.
7.       Under the Policy section, select the desired multipathing policy from the dropdown.

8.       Click Change to confirm the change in path policy.

How to find the HBA details in ESXi 5.1 server

How to find the HBA details in ESXi 5.1 server

1.  from /proc/scsi

~ # cd /proc/scsi/qla2xxx/

/proc/scsi/qla2xxx #

/proc/scsi/qla2xxx # ls

3  4

/proc/scsi/qla2xxx # cat 3 | head -3

QLogic PCI to Fibre Channel Host Adapter for HPAK344A:

        FC Firmware version 5.06.05 (90d5), Driver version 934.5.6.0-1vmw

Here,
FC firmware version is - 5.06.05 (90d5),
Driver version is - 934.5.6.0-1vmw

2.  run the following command 

~ # esxcfg-scsidevs -a

 # esxcfg-scsidevs -a
vmhba0  hpsa              link-n/a  sas.500xxxxxxxxxxxxx                    (0:2:0.0) Hewlett-Packard Company Smart Array P420i
vmhba1  qla2xxx           link-up   fc.500xxxxxxxxxxxd9:500xxxxxxxxxxxd8    (0:xx:x.x) QLogic Corp ISP2532-based 8Gb Fibre Channel to PCI Express HBA
vmhba2  qla2xxx           link-up   fc.500xxxxxxxxxxx99:500xxxxxxxxxxx98    (0:xx:x.x) QLogic Corp ISP2532-based 8Gb Fibre Channel to PCI Express HBA


-- you can see the driver as qla2xxx  for QLogic HBA card
-- now to find driver version execute the following command

~ # vmkload_mod -s qla2xxx |grep Version
 Version: Version 934.5.6.0-1vmw, Build: 472560, Interface: 9.2 Built on: Sep 21 2012