December 2017
Beginner
598 pages
14h 7m
English
Content preview from Mastering VMware vSphere 6.5
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Permanent Device Loss (PDL) and All-Paths-Down (APD)
Starting with vSphere 6.0, in vSphere HA configurations, there is a new storage-related feature, VM Component Protection (VMCP), that protects virtual machines from possible storage issues.
There are two different types of conditions that can be managed by VMCP:
- PDL: It occurs when the storage array issues a SCSI sense code indicating that the device is unavailable (for example, a failed LUN)
- APD: Usually, related to an underlying storage/networking issue, different from a PDL because the host doesn't have enough information to determine if the device loss is temporary or permanent
The configuration is available in the vSphere Web Client and also in the new HTML5 client. A typical response ...
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