Hi, I have modified the sbull block driver given in Linux Device Drivers to use the simple request function to just printk CURRENT values. http://www.xml.com/ldd/chapter/book/ch12.html I am able to compile the same. The documentation says: "A block driver using the request function just shown will actually work -- for a short while. It is possible to make a filesystem on the device and access it for as long as the data remains in the system's buffer cache" I have created a device file using #mknod /dev/sbull b 250 0 This group type is root. All other block drivers have group set to disk. Should I change the same? How would I go about creating a filesystem and mounting the same to test the "request" function? I tried "mke2fs /dev/sbull". While doing "mount /dev/sbull /mnt/sbull" I get: FAT: bogus logical sector 0 VFS: Can't find a valid FAT filesystem on dev fa:00 mount: you must specify the filesystem type Any suggestions as to how I can test the request function? Thanks, K Shakthi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
