pseudo device

pseudo device

Device driver that provides similar interface as a character or block device driver but provides better quality storage.

For example, using EMC’s multipath feature, a pseudo device configured over 2 or more physical devices at host level:

Has multiple access paths to the same external storage device
Provides higher I/O throughput to the applications
Provides the ability to cope with a path failure

When a program accesses a path containing the pseudo device name corresponding to a disk partition, then the access is performed through the pseudo device driver by the operating system on behalf of the user program.