Pasi Kärkkäinen wrote: > It seems X4500 (not available anymore) had Marvell SATA controllers, that > are not supported with RHEL5. > And those marvell controllers caused major grief for Sun, especially when Solaris added support for NCQ somewhere in there. under heavy IO workloads, the controllers would just hang. Some nasty bugs. Driver software workarounds caused a big performance hit.