XtremIO X1 and VMware - APD v’s PDL

In general, when a Storage Controller is shutting down for any reason, XtremIO X1 will send a "Logical Unit Not Supported" SCSI response code (0x5/0x25) in response to any requests received by that storage controller from a connected host. This could be just a single SC shutdown…

#Tags: xtremio, vmware, APD, PDL

XtremIO and VMware Path Failure Detection

In XtremIO XIOS version 4.0.10 we made an (optional) change to the SCSI error codes that the array returns to ESX hosts under certain circumstances. To understand the difference, we first need to understand a little about how VMware acts when a LUN disappears for some reason. When…

#Tags: xtremio, vmware, APD, PDL