GURU4HP

Friday, November 9, 2012

WR1043ND OpenWRT Hacks

If you are interesting how you can tweeak you WR1043ND route under OpenWRT, you can check this link:

http://knowhow.bart.prokop.name/install/openwrt/wr1043nd

Tuesday, October 2, 2012

How to mount remote windows partition (windows share) under Linux

Procedure to mount remote windows partition (NAS share)

1) Make sure you have following information:
==> Windows username and password to access share name
==> Sharename (such as //server/share) or IP address
==> root level access on Linux
2) Login to Linux as a root user (or use su command)
3) Create the required mount point:
# mkdir -p /mnt/ntserver
4) Use the mount command as follows:
# mount -t cifs //ntserver/download -o username=vivek,password=myPassword /mnt/ntserver
Use following command if you are using Old version such as RHEL <=4 or Debian <= 3:
# mount -t smbfs -o username=vivek,password=D1W4x9sw //ntserver/download /mnt/ntserver
5) Access Windows 2003/2000/NT share using cd and ls command:
# cd /mnt/ntserver; ls -l
Where,

-t smbfs : File system type to be mount (outdated, use cifs)
-t cifs : File system type to be mount
-o : are options passed to mount command, in this example I had passed two options. First argument is password (vivek) and second argument is password to connect remote windows box
//ntserver/download : Windows 2000/NT share name
/mnt/ntserver Linux mount point (to access share after mounting)

Monday, October 1, 2012

HOW-TO enable multipathing on RedHat Linux 5.x

In Red Hat Enterprise Linux 5, device-mapper-multipath is installed by default. This is a change from Red Hat Enterprise Linux 4. If a third party multipathing solution is in use, device-mapper-multipath should be disabled to avoid any conflict between the multiple multipathing technologies. But RedHat multipathing is NOT ACTIVATED by default and you must enable it.

To enable it, modify the setting in /etc/sysconfig/mkinitrd/multipath file by changing MULTIPATH from NO to YES
        MULTIPATH=YES
By default, /etc/multipath.conf has all devices blacklisted. If this default configuration has been changed, the change should be reverted. Comment out following three lines:
        # Blacklist all devices by default. Remove this to enable multipathing
        # on the default devices.
        blacklist {
               devnode "\*"
        }
Then reboot. Enable the multipathd on boot and start it by
        chkconfig mutipathd on
      service multipathd start
At this time, you should be able to see multiple connections to the LUNs on the storage array if everything set correctly and you can verify it using   "fdisk -l". You should see some newly enabled "dm-??" devices. Also run "/sbin/multipath -ll" command and should see the path to each device. i.e. the path mpath2 for device dm-7 pointing to two devices sdj and sdx.
     mpath2 (3600a0b80004879f0000004064a5b5d9f) dm-7 SUN,CSM200_R
   [size=50G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
    \\\\\\_ round-robin 0 [prio=200][active]
     \\\\\\_ 0:0:1:2 sdj 8:144 [active][ready]
     \\\\\\_ 1:0:1:2 sdx 65:112 [active][ready]
     \\\\\\_ round-robin 0 [prio=0][enabled]
     \\\\\\_ 0:0:0:2 sdc 8:32   [active][ghost]
     \\\\\\_ 1:0:0:2 sdq 65:0   [active][ghost]
You should see I/O activities on both sdj and sdx when running dd test on dm-7.

Rescan the SCSI bus w/out rebooting

To add or remove a SCSI device explicitly, or to re-scan an entire SCSI bus without rebooting a running system:

Red Hat Enterprise Linux 4 or 5:

To rescan an entire SCSI bus and re-register all devices found:
When dealing with fibre attached storage, it is necessary to issue a LIP (loop initialization primitive) on the fabric:

shell> echo "1" > /sys/class/fc_host/host#/issue_lip

Replace the “#” with the number of the SCSI bus to be rescanned.

Note: Issueing a LIP (above) on Red Hat Enterprise Linux 5 is all that is needed to rescan fibre
attached storage. Once the LIP is issued, the bus scan may take a few seconds to complete.

To rescan all other SCSI attached storage, a rescan should be issued:

shell> echo "- - -" > /sys/class/scsi_host/host#/scan

Replace the “#” with the number of the SCSI bus to be rescanned.

In addition to re-scanning the entire bus, a specific device can be added or deleted for some versions or Red Hat Enterprise Linux as specified below.

Red Hat Enterprise Linux 4 or 5:

To remove a single existing device explicitly

shell> echo 1 > /sys/block//device/delete

Red Hat Enterprise Linux 3 or 4:

To add a single device explicitly:

shell> echo "scsi add-single-device    " > /proc/scsi/scsi

To remove a device explicitly:

shell> echo "scsi remove-single-device    " > /proc/scsi/scsi

Where are the host, bus, target, and LUN numbers for the device,as reported in /sys (2.6 kernels only) or /proc/scsi/scsi or dmesg. These numbers are sometimes refered to as “Host”, “Channel”, “Id”, and “Lun” in Linux tool output and documentation.

3Par Documentation, Best Practices, and Case Studies Repository

Thursday, September 27, 2012

HOW-TO check under Linux qlogic/emulex hba firmware version and model name type

Here’s a script to check linux hba model name, firmware version:
#!/bin/ksh
for SCSI in `ls -d /sys/class/scsi_host/host*`;
do
[ -e ${SCSI}/modelname ] && echo -n ‘Model Name ‘ && cat ${SCSI}/modelname;
[ -e ${SCSI}/model_name ] && echo -n ‘Model Name ‘ && cat ${SCSI}/model_name;
[ -e ${SCSI}/fwrev ] && echo -n ‘Firmware Version ‘ && cat ${SCSI}/fwrev;
[ -e ${SCSI}/fw_version ] && echo -n ‘Firmware Version ‘ && cat ${SCSI}/fw_version;
done
Also here’s a script for you if you’re checking bunches of servers:

#!/bin/ksh
USERNAME=”root”
PASSWORD=”yourpassword”
for i in `cat /home/doxer/servers_list_linux`
do
echo “”>/root/.ssh/known_hosts
expect < spawn ssh -l${USERNAME} -p22 $i “echo -n ‘====’;hostname;cat /sys/class/scsi_host/host*/{modelname,model_name,fwrev,fw_version}”
set timeout 20
expect “*yes*”
send “yes\r”
expect “assword:”
send “${PASSWORD}\r”
expect eof
EOF
done

Tuesday, September 25, 2012

HP resources for VMware

General resources

HP virtualization with VMware – This is the main page about VMware in the HP site. It has dozens of links to White Papers, webinars, podcasts and other HP sites about VMware.
HP and VMware Virtualization Alliance – The HP-VMware Alliance page in the VMware site. It has several areas that outline the different HP-VMware joint solutions.
VMware Enterprise Library at HP – Case studies, White Papers and Datasheets.
HP Insight Control for VMware vCenter Server
HP Virtualization Smart Bundles with VMware
HP VirtualSystem for VMware – Main portal of HP VirtualSystem solution
HP VirtualSystem VS1 for VMware
HP VirtualSystem VS2 for VMware
HP VirtualSystem VS3 for VMware
HP Software Releases & Media- Information about VMware products OEM licensing from HP
VMware vSphere from HP QuickSpecs
HP VMware Transition Matrix

Blog posts

This section includes posts from several bloggers about VMware and HP.

BIOS settings in a VMware ESX(i)/vSphere Environment – By Kenneth van Ditmarsch VCDX #040 (@VirtualKenneth)
Understanding HP Flex-10 Mappings with VMware ESX/vSphere – By Kenneth van Ditmarsch VCDX #040 (@VirtualKenneth)
Using Lefthand Snapshot techniques within a VMware Environment – By Kenneth van Ditmarsch VCDX #040 (@VirtualKenneth)
Creating easy to identify Lefthand Volumes on ESX/vSphere – By Kenneth van Ditmarsch VCDX #040 (@VirtualKenneth)
Testing Scenario’s VMware/HP c-Class Infrastructure - By Kenneth van Ditmarsch VCDX#040 (@VirtualKenneth)
Lefthand SAN – Lessons Learned – By Frank Denneman VCDX #029 (@frankdenneman)
Flex-10 Lessons Learned – By Frank Denneman VCDX #029 (@frankdenneman)
Maching an HP FlexNIC in ESXi to Chassis Flex-10 Bay and Port Number at Install Time – By Simon Gallagher (@vinf_net)
8 Node ESXi Cluster running 60 virtual machines – All running from a 500GBP Physical Server – By Simon Gallagher (@vinf_net)
HP Virtual Connect Flex-10 and vSphere – By Barry Coombs (@VirtualisedReal)
ESX 4.1 Breaks HP Flex10 Smart Link – Julian Wood (@julian_wood)
Flex-10 ESX Prerequisites – Julian Wood (@julian_wood)
How to Integrate VMware Vsphere 4 with Multiple HP C7000s using HP Flex-10 (Active/Active) with HP Virtual Connect – Part 1 – Jeffrey Wolfanger
How to Integrate VMware Vsphere 4 with Multiple HP C7000s using HP Flex-10 (Active/Active) with HP Virtual Connect – Part 2 – Jeffrey Wolfanger
How to Integrate VMware Vsphere 4 with Multiple HP C7000s using HP Flex-10 (Active/Active) with HP Virtual Connect – Part 3 – Jeffrey Wolfanger
Three Requirements for HP Flex-10 and Virtual Connect with VMware Vsphere 4 – Jeffrey Wolfanger
VMware Vsphere 4.1 and Flex 10 Advisory Smartlink Issues Again – Jeffrey Wolfanger
Rethinking Network Design with FlexFabric and vSphere 4.1 – Jeffrey Wolfanger
Running VMware vSphere on an HP MicroServer – Simon Seagrave (@kiwi_si)
Using Jumbo Frames on an HP ProLiant ML115 G5 – Simon Seagrave (@kiwi_si)
VMware ESXi Purple Screen of Death on HP ML110 or ML115 – Simon Seagrave (@kiwi_si)
Installing and Running VMware vSphere (ESX 4.0) on your lab HP ProLiant ML110 or ML115 – Simon Seagrave (@kiwi_si )
Can you run VMware vSphere Fault Tolerance (FT) on an HP ProLiant ML110 or ML115? – Simon Seagrave (@kiwi_si )
VMware ESX – Removal of HP Agents and Utilities After Migration – Simon Seagrave (@kiwi_si )
VMware P2V – Easy Method to Remove HP Agents and Utilities – Simon Seagrave (@kiwi_si )
VMware ESXi 4.o Update 1 (U1) Fixes SATA CD/DVD-ROM Issue with HP ProLiant ML115 G5 – Simon Seagrave (@kiwi_si )
HP ProLiant ML110 G6 Released – Still a worthy virtualization work or home lab server? – Simon Seagrave (@kiwi_si )
VMware ESX – “Upgrading ESX 4.0 to 4.0 Update 1 on HP Proliant systems can fail or time out and leave the host in an unusable state if the host has HP Insight Management Agents running” – Simon Seagrave (@kiwi_si )
Recommended BIOS Settings on HP ProLiant DL580 G7 for VMware vSphere – Sammy Bogaert
Check HP Management Agents with PowerCLI – Sammy Bogaert
VMware ESXi 4 and HP Servers – Rick Scherer VCDX #020 (@rick_vmwaretips)
Advisory – ESX 4.1 + HP Flex-10 + Broadcom bnx2x = Bad News – Rick Scherer VCDX #020 (@rick_vmwaretips)
Running vSphere 4 on HP P2000 – Justin Paul (@recklessop)
How vSphere 4.1 Network I/O Control changed the way we use HP Flex-10 – Stefan Jagger (@StefanJagger)
Flex-10 ESX design with simplicity and scalability: Part 1 – Julian Wood (@julian_wood)
Flex-10 ESX design with simplicity and scalability: Part 2 – Julian Wood (@julian_wood)
HP MSA, Channel Enclosure Svc Dev, LUN0 and Mask Path – Didier Pironet (@dpironet)
Flex-10 ESX pre-requisites – Julian Wood (@julian_wood)
HP joins the FlexPod and Vblock party with HP VirtualSystem - Julian Wood (@julian_wood)
HP Blade & Virtual Connect Firmware and Nic drivers for vSphere 5 - Julian Wood (@julian_wood)
HP ESXi Hosts continually disconnect from vCenter - Justin Paul (@recklessop)
HP P2000 G3 – Upgrading to get VAAI Support - Justin Paul (@recklessop)
VMware NMP errors and LUN dropping with HP EVA SANs - Jeffrey Wolfanger
HP’s answer to Vblock – Meet the HP VirtualSystem for VMware – Justin Vashisht (@3cVguy)
vSphere VSA vs HP P4000 VSA - Justin Vashisht (@3cVguy)