I agree, this looks like a kernel issue. I looked over the 2.4.27 kernel changelog. Nothing in the changelog points to a module level change that might cause this type of problem. I downloaded a copy of the 2.4.27 kernels source tree. Once again there do not seem to be modifications to the SPARC source tree (BIG ASSUMPTION HERE that the problem is in the SPARC side of the kernel source tree.) that would cause a problem in the kernel. If I have to guess, this may be a kernel configuration problem. I looked at the kernel configuration options I came across a kernel configuration flag CONFIG_BLK_DEV_SR_VENDOR. This flag enables the use of vendor specific SCSI commands. These are needed to support multisession CD's for old Toshibia drives. (Given the vintage of my Sparcstation 5 the Toshibia drive is likely to be "old".) I tried to locate the 2.4.27 kernel configuration file on my installation CD but failed to find it. I would like to do a diff between the 2.4.26 and 2.4.27 kernel configuration files to see if the problem is related to how the kernels were configured. Is is possible to get a copy of these configuration files?
