From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows 98; T312461) Description of problem: I have corrupted data transfers from my cd-rom/cdrw Version-Release number of selected component (if applicable): How reproducible: Sometimes Steps to Reproduce: 1.Copy any larger file from cdrom/cdrw drive 2.Unpack or check MD5-sum 3. Actual Results: The file is copied without any error messages, but during unpacking or installing there are errors (rpm checksum etc.). I found, that after enabling DMA for cdrom, this problem disappears. This bug appeared with version 7.3. Additional info: 1. Comp Athlon 1800+, 256 MB DDR RAM, ABIT KR7, Cyberhome DVD drive 2. Comp Athlon 1700+, 256 MB DDR RAM, Soltek SL-75DRV4, NEC CDRW
do you know if dma is enabled for the cdrom drive?
In default it is disabled from 7.3 and in /etc/proc/ide/hdc/settings is 0 in DMA collumn. After enabling DMA the transfers are without corruptions (through /etc/sysconfig/harddiskhdc). As I wrote the same think happened with different board and drive. I had already problems with verifying Redhat install CD`s. The checksum was sometimes OK, but sometimes not. With DMA enabled, checksums were OK everytime.
Seems to be fixed in latest kernels 2.4.18-5 and 2.4.18-10. Thanks.