EMC PowerPath Multipathing automatically tunes your storage area network (SAN) and selects alternate paths for your data if necessary. Residing on the server, PowerPath Multipathing enhances SAN performance and application availability. It also integrates multiple-path I/O capabilities, automatic load balancing, and path failover functions for complete path management.

PowerPath Multipathing supports a wide range of servers including cluster servers connected to EMC Symmetrix, EMC CLARiiON, EMC Invista, Hitachi Data Systems Lightning, HP XP, IBM Enterprise Storage Server, and HPQ storage systems. Virtual Servers are supported by EMC PowerPath/VE. Full Story

On most Sun systems you can obtain the disk serial numbers that correspond with c#t#d#’s with the following command:

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If Fibre Channel devices are not present or turned off, boot errors will occur. Without corrective action, these errors will persist for every re-boot.

The boot errors which are linked to this problem, can be found in the /var/adm/messages file, and are formatted as follows:


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With the release of Solaris 10 Operating System (OS), the configuration of Storage Area Network (SAN), Serial Attached SCSI (SAS) attached devices, and turning on STMS/MPXIO has changed. This Post details the new ways devices are brought into the operating system, and their configuration files.

The default way Solaris 10 handles SAN/SAS attached devices is to auto-configure them. All devices seen on a Host Bus Adapter(HBA)/Attachment point in the SAN/SAS are automatically configured. Full Story

 In conventional IT systems, storage devices are connected to servers by means of SCSI cables. The idea behind storage networks is that these SCSI cables are replaced by a network, which is installed in addition to the existing LAN.  Server and storage devices can exchange data over this new network using the SCSI protocol
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When using commands such as ‘sar -d‘ or ‘iostat’, the naming of the devices is based on sd numbers which must be translated into  cxtxdx numbers to be useful. When LUNs are involved, the translation process differs.

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