Ne, je to pouze u PATA disků a neznamená to prakticky nic. Jenom se to musí hlídat aby nebyly oba disky master nebo oba slave.

Master and slave clarification
Although they are in common use, the terms master and slave do not actually appear in current versions of the ATA specifications. The two devices are correctly referred to as device 0 (master) and device 1 (slave), respectively. It is a common myth that the controller on the master drive assumes control over the slave drive, or that the master drive may claim priority of communication over the other device on the channel. In fact, the drivers in the host operating system perform the necessary arbitration and serialization, and each drive's controller operates independently.

The terms "master" and "slave" have not been without controversy. In 2003, the County of Los Angeles, California, USA demanded that suppliers stop using the terms because the county found them unacceptable in light of its "cultural diversity and sensitivity."