The IBM Enterprise Storage Server (ESS) or the Shark is an enterprise storage array from IBM.
[1] It did not meet commercial success and the successor came in 1999[2] in the form of the ESS, based on the same Seascape architecture.
The ESS was also widely known by its IBM internal codename Shark.
The 2001 lineup have a redesigned case; this version won IF design award.
[3] It has been superseded by the IBM DS8000 series of storage servers.