Jamie's Blog

Extend encrypted LVM By adding new physical disk

1. Verify the volume group and the logical volume name:

pvdisplay
lvdisplay


2. Add a new hard disk device to add to the volume group (in this example /dev/sdd):


pvcreate /dev/sdd
vgextend existing_volume_group /dev/sdd


3. After extending the volume group, extend the underlying Logical Volume (500GB):


sudo lvextend -L+500G /dev/existing_volume_group/logicalvolume_data


4. Resize the Crypt:

sudo cryptsetup resize /dev/mapper/


5. Resize filesystem:

sudo resize2fs /dev/mapper/


Find which VM has snapshots on datastores

Problem: Many VMs had snapshots not listed in snapshot manager but still existed on the filesystem.

Solution:

Find all the snapshots on the datastores and clean them up by either cloning the virtual machine or command line tools.

Run this command on a host that has access to all the datastores you wish to scan.

find /vmfs/volumes/ -name “*delta*” -type f  -print0 | xargs -0 du –human-readable –total|less

VMware vSphere Client On Windows 7

vSphere client is now fully supported on Windows 7 using 4.0 Update 1 version.

No hacking required.

VMware-VIMSetup-all-4.0.0-208156

VMWare Fiber Connection Best Practices

Zoning

Best Practice fibre cabling would be like so:
A0, B1, A2, B3 are all plugged into Fabric_A
B0, A1, B2, A3 are all plugged into Fabric_B

First HBA from each host plugs into Fabric_A
Second HBA from each host plugs into Fabric_B

Zoning example for Host1 zone on Fabric_A:
Zone members = Host HBA, A0, B1, A2, B3

Zoning example for Host1 on Fabric_B
Zone members = Host HBA, B0, A1, B2, A3
Clariion Settings

There are also two parameters that you need to pay particular attention to when working with Clariion Storage Systems
– The Failover Mode and The ArrayCommPath settings.
These control the behavior of the Clariion when a ‘trespass’ occurs on the array.
Trespass basically means that the ownership of a LUN moves from one SP to the other.

From an ESX server perspective there are two setting for these values.

-For a non-failover environment, the settings are as follows:

Initiator Type: Clariion Open
Failover Mode: 0
Array Commpath: Disabled

-For a failover-enabled environment, the settings are as follows:

Initiator Type: Clariion Open
Failover Mode: 1
Array Commpath: Enabled

ESX

Ensure ALL ESX servers on the Clariion are using MRU policy – your paths should look similar to the example below:

# esxcfg-mpath -l

Disk vmhba2:0:0 /dev/sdc (10240MB) has 4 paths and policy of Most Recently Used
FC 3:11.0 210000e08b1c8e42<->500601683021b9df vmhba2:0:0