VOLUME load with DRV

The product DRV (Dual Recording by Volume) allows dual disk drives to be used. This increases the availability factor for data stored on the disks. Each write request made by DVS is sent to both disks, and each read request is executed on the disk with the shortest access time available (shortest positioning path, lowest queue length prior to the disk drive).

The duplicate of the disk has its own mnemonic device address, yet the same VSN as the original disk. When interpreting the monitoring values, the consequences of this are the following ones:

• The VSN is duplicated in the CONFIGURATION table (with different mnemonic name values).

• A VSN can also appear twice in the DEVICE report (with different monitored data).