I have not heard of any problems with the SunBlade itself. This is a question which most likely should be posed to the storage vendor you are using. I have many customers on Solaris 8 with zero problems and that goes for the Qlogic adapters as well.
Check the Qlogic Web site at: http://www.qlogic.com/bbs-html/csg_web/adapter_pages/sw_page.html to make sure you are using the correct driver for the storage vendor you are using. EMC, HP, IBM require specific driver versions for the HBA to operate correctly with their storage.
This was first published in May 2001