On Monday 10 March 2003 23:54, Mike A. Harris uttered: > If someone then goes and plays with hdparm settings, they may in > fact be force-overriding the kernel's safety mechanisms, and > enabling some setting that triggers a flaw in the drive, the > motherboard chipset, or some combination of the two, and that may > cause data corruption. > > Second guessing the hard disk settings that modern kernels > default the drives to is Russian Roulette. Some settings might > turn out to be harmless (or perhaps the kernel just ignores them > and you _think_ the change did something), while other settings > perhaps do change something (but have zero real effect on speed). > > Short Answer: Trust the kernel to do the right thing.
Ok, but will the kernel know to turn DMA on or off? If /etc/sysconfig/harddisks was empty, would DMA be enabled on harddisks upon boot? What about CDRoms? You have to manually enable DMA on CDroms that you want to have DMA access on. Red Hat turns of DMA by default (a good thing) since a lot of CDrom/ide chipset combos don't work too well together for DMA. Those of us that have a working set have to re-enable DMA manually. Has this changed in some way or another? -- Jesse Keating RHCE MCSE http://geek.j2solutions.net Mondo DevTeam (www.mondorescue.org) Was I helpful? Let others know: http://svcs.affero.net/rm.php?r=jkeating -- Phoebe-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/phoebe-list
