What makes a storage path ensures relative to assets?

I was looking around our new facility vSphere 4.1 and noticed in the section ways of managing a data store that there are 2 iSCSI connections listed but it said active and told the day before. Wouldn't be better to have two assets so they could be used at the same time? We will add more connections and would be nice to use at the same time. How are you going to change that or which is done by the selection of the path type? (see attachment)

Here's how it works:

When a storage array is attached, vSphere queries table to determine its capabilities.  Of this, it determines which path to use selection plugin.

Given your screenshots, it seems that you have a form any of the picture of LSI, which most is ALUA arrays.  For a description of what it really means, read my blog post, and then come back to: http://blog.cowger.us/2011/07/03/alua-active-arrays/

Using provides the information in the table, host (vSphere) can determine which paths are "optimal" (and so should be active) and which are not (they would face a sentence of use and must be on standby only).

Under access roads 'Fixed', the host uses only the path defined to send data commands unless its not available, in which case it will change to a secondary road.  When the main path comes back, it passes in return.  Fixed paths is a bit rare these days.  You use only 1 channel and 1 controller at a time.

Under pathing MRU, the host uses the path most recently used to send data commands and passes only when the path in use is unavailable.  It does not back automatically (to avoid some problems related to the intrusions of LUNS).  You use only 1 channel and 1 controller at a time.

Under Robin, the host passes quickly (by default, every 1000 orders) between all the * asset * paths (those reported by the table to be optimized).  You use yet only 1 channel and 1 controller at a time, but you switch between them.

Using the default vSphere Multipathing plugin, there is no way to simultaneous use of more than 1 channel at any time.  To do this, you need a form any balancing of the actual load, which are usually addons.  The only ones I know who don't are the MEM (usable only with arrays EQL) Equallogic and the EMC PowerPath/VE plugin, which can use all the paths to the storage at the same time (with EMC and some other tables).

I hope this helps.

(warning, I work for EMC).

Tags: VMware

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