Complex sentence: Maxtor sold the rights to their original "XT"-series drives to a company called Sequel in the mid- 1990s, thus exiting the server SCSI drive market; around this time, SCSI versions of the 7000 series drives were also discontinued.
Split into simpler sentences: Maxtor sold the rights to their original "XT"-series drives to a company called Sequel in the mid- 1990s, thus exiting the server SCSI drive market. Around this time, SCSI versions of the 7000 series drives were also discontinued.