When deploying Direct Attached Storage (DAS) only systems, it is important to remember that failure of a VM brings down all the components that are installed on the VM. This is because DAS is a type of storage that is connected directly to the computer accessing it, such as a PC or server, as opposed to storage that is accessed over a network, such as network-attached storage (NAS) or storage area network (SAN). DAS provides fast and low-latency access to the data, but it also limits the scalability and availability of the system. If a VM fails, the data stored on the DAS attached to that VM becomes inaccessible to other VMs or applications. Therefore, it is essential to have a backup and recovery strategy for the data on the DAS, as well as a high availability design for the VMs123. References: Solution Design Guide for Cisco Unified Contact Center Enterprise, Release 12.6 (1)1, Direct-Attached Storage (DAS): What is it?4, Share an Azure managed disk across VMs2.
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