Description of problem: Enabling DMA & boosting the data transfer. Version-Release number of selected component (if applicable): How reproducible: Everytime Steps to Reproduce: I have HP 7400 DX Tower. I have installed two Operating Systems on it: 1.] SLES 10 SP1 2.] RHEL 5.1 SLES has recognized the hard-disk as /dev/sda where as RHEL has recognized it as /dev/hda which means that RHEL has not enabled the DMA. How can I enable DMA? Also copying chunk of data on RHEL is taking years where as in SLES it is getting copied like a charm. Thus SLES has found a S-ATA drive, and RHEL thinks it's P-ATA. Actual results: On RHEL 500 MB data is taking 5 min to get copied locally where as on SLES it takes less than 50 secs. Expected results: It should recognize the hardisk as SATA and data transfer should be fast. I think it's a driver issue. Do we have a patch or a workaround? Additional info:
Please test a more recent RHEL5 kernel: http://people.redhat.com/jwilson/el5/ If this is still a problem, please attach the output of dmesg after boot, and the output of lspci.
Closing, please re-open if necessary.