InfoWorld’s Test Center has a positive review of Sun’s new-ish storage solution:
The Sun Fire X4500, nicknamed Thumper, is exactly that: a dual-Opteron server with 48 hot-swappable SATA drives in a single 4U chassis, achieving a raw total of 24TB with 500GB SATA drives. You could fit the entire catalog of the Library of Congress on a single X4500 — 2.5 times over. Armed with four gigabit NICs, 4GB of RAM, and a default installation of Solaris x86, the X4500 is a server in a class all its own.
But what’s it really for? Based on the performance levels I saw during my review, I’d say anything that requires lots of fast storage.