I'm trying to build driver for hpt374 raid controler on a new installation of contOS 4.2 followin the instroctions in this thread http://www.centos.org/modules/newbb/viewtopic.php?viewmode=flat&order=DESC&topic_id=223&forum=7 It says that I should run "yum install kernel-sourcecode" to get the files I need and it will create the path /usr/src/linux-2.6.9-5.0.3.EL which is needed. (guess it will be 2.6.9-22.EL in centOS 4.2) But the output from yum is this: [root@localhost hpt374]# yum install kernel-sourcecode Setting up Install Process Setting up repositories update 100% |=========================| 951 B 00:00 base 100% |=========================| 1.1 kB 00:00 addons 100% |=========================| 951 B 00:00 extras 100% |=========================| 1.1 kB 00:00 Reading repository metadata in from local files primary.xml.gz 100% |=========================| 9.8 kB 00:00 update : ################################################## 28/28 Added 12 new packages, deleted 0 old in 0.15 seconds Parsing package install arguments No Match for argument: kernel-sourcecode Nothing to do I tried using /usr/src/kernels/2.6.9-22.EL-i686 as KERNELDIR but that doesn't work. I tried "yum search /usr/src/linux" and "yum provides /usr/src/linux" with no result. I installed everything from the 4 centOS CD's but none of the scsi.h located on the system looks like the one I need as they don't define `SCSI_DISK0_MAJOR'. --- /root/hpt374/hpt.c:38:18: scsi.h: No such file or directory /root/hpt374/hpt.c: In function `get_bdev': /root/hpt374/hpt.c:60: error: `SCSI_DISK0_MAJOR' undeclared (first use in this function) /root/hpt374/hpt.c:60: error: (Each undeclared identifier is reported only once /root/hpt374/hpt.c:60: error: for each function it appears in.) /root/hpt374/hpt.c:60: error: initializer element is not constant /root/hpt374/hpt.c:60: error: (near initialization for `major[0]') --- What I'm I missing ? and SORRY if it is something obvious, this is the first time I'm trying to build a driver. best regards Ulrik