Category Archives: Storage

Change EMC Powerpath Failover Policy on UNIX Systems

As UNIX system administrators – we need our Operating Systems running in optimal state every time. The same is what we want to our storage systems. In EMC Powerpath there are a couple of failover policies that we can enforce to our storage devices but we must always use the one that is best suitable. We have here a LUN that is currently under Basic Failover policy even though the storage is CLARiiON:

Import Disk Group (DG) in VxVM

Have you ever encounter rebooting a server and your Veritas filesystems are missing? Most cases these filesystems were not imported during boot up and is not available for OS to use. Importing a disk groups in VxVM does not need any reboot, follow these simple steps and you will be able to get back your disk groups in no time.

Sun StorEdge A1000 Battery Replacement Procedure

Sun StorEdge A1000 is one of the oldest storage array from SUN but still widely used. Just recently, we received a battery expiration and we need this replaced as soon as possible to ensure optimal operation of the said Sun StorEdge A1000 array. Below are the steps that we used to replace the expired battery:

Install EMC PowerPath License on UNIX Systems

Today we encountered a degraded policy in EMC PowerPath disk on one of our SUN/Oracle Solaris boxes. We found out that the license for our PowerPath was not properly installed on the system. With this current issue – our disks is only running on Basic Failover policy which is not recommended for CLARiiON disks. To mitigate the issue, we need to install the license and set the policy back to CLARiiON Optimization Policy.

High Availability on Oracle Solaris with Clustering

Having a Mission-Critical Environment means a system downtime could mean a lot. Here comes the high availability comes in, and with clustering this give our service availability very high. In the upcoming Solaris 11, high availability is the main focus of Oracle. Solaris Cluster covers a lot of applications, zfs and virtualized zones.