MMU is a chip on the motherboard, however Sun says that most MMU problems are not motherboard related. Are you getting this error while booting from HD or from CD? Is this workstation exactly as originally shipped from Foxboro or have any components been changed? Is there anything that led up to this fault? Like changing the HD from another workstation to this one? Is this a fresh install or a workstation that has been in service for a while? Consider re-seating memory modules and PCI cards. When you do a probe from the OK prompt do you see any data access errors? Regards, Kevin FitzGerrell On 7/12/07, Kashif Ijaz <kashifijaz93@xxxxxxxxxxx> wrote: > One message that is recently starting coming is "Fast Data access MMU Miss". > It is not coming up and dies while rebooting. > > If anyone has any idea about it!!! > > Regards, > > Kashif Ijaz > _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave