Many users managing virtualized environments with VMware ESXi often inquire about the flexibility of their storage solutions. A common question arises: “Is it possible to move a datastore from one ESXi host to another?” Specifically, this concern is often voiced by administrators looking to reorganize resources or upgrade hardware within their infrastructure. The short answer is yes, moving a datastore between Esxi Servers is indeed possible, but it requires careful planning and execution.
The feasibility of moving a datastore largely depends on the underlying file system, which in the context of ESXi, is typically VMFS (Virtual Machine File System). As long as the target ESXi server is compatible with the VMFS version of the datastore being moved, the process is generally straightforward. Compatibility is usually ensured if the target ESXi host is running a version equal to or newer than the source ESXi host. This forward compatibility of VMFS versions is a key aspect to consider for a successful datastore migration.
However, the physical configuration of your datastore also plays a crucial role. If your datastore resides on a local RAID array, the migration process involves hardware considerations. Specifically, you need to verify if your RAID controller supports migrating RAID arrays to a different controller, even if it’s of the same brand. Most modern RAID controllers from reputable vendors offer this capability, but it’s essential to consult your RAID hardware documentation to confirm compatibility and the correct procedure for array migration. An alternative, and sometimes simpler, approach is to physically move the disks along with the RAID controller to the new ESXi host. This method bypasses the need for RAID array import on a new controller, as the configuration is maintained with the original hardware.
Before undertaking any datastore migration, a critical step is to perform a full backup of all data residing on the datastore. Data loss is always a potential risk when dealing with storage hardware and migrations, so a comprehensive backup serves as a safety net. Furthermore, ensure that all necessary storage-related drivers, especially RAID controller drivers, are correctly installed and functioning on the target ESXi server. Proper driver installation is crucial for the target host to recognize and correctly interact with the migrated datastore.
In conclusion, moving a datastore between ESXi servers is achievable. By paying close attention to VMFS compatibility, RAID configuration nuances, performing thorough backups, and verifying driver readiness on the target ESXi server, administrators can successfully migrate datastores and maintain the integrity of their virtualized environments.
