Abstract: Virtual tape libraries (VTLs) and methods for concurrently accessing a VTL are provided. One VTL includes memory partitioned into multiple volumes, multiple virtual drives, and a processor. The processor is configured to enable multiple applications to concurrently access a virtual storage volume in a first or second access mode. One method includes receiving a first request for a first application to access a virtual storage volume to write data to or read data from the virtual storage volume and granting the first request. The method further includes receiving a second request for a second application to concurrently access the virtual storage volume to write data to or read data from the virtual storage volume, determining if the first and second requests are compatible, and accepting or denying the second request based on the determination. Also provided are physical computer storage mediums including computer code for performing the above method.