I'm finding that if I set /etc/sysconfig/harddiskhdb to USE_DMA=1 hdparm will show dma is still off for this device. However, if I rename harddiskhdb so it won't be recognized and then edit modules.conf to add 'options ide-cd dma=1' then hdparm will show dma being on for my drive. Drive identification: Oct 8 20:50:49 bobcp4 kernel: hdb: ASUS DVD-ROM E616, ATAPI CD/DVD-ROM drive Oct 8 20:51:18 bobcp4 kernel: hdb: ATAPI 48X DVD-ROM drive, 512kB Cache, UDMA(33) I built this machine using an Asus P4T533 motherboard and an Intel Pentium 4 2.8 gig cpu. Bob Cochran Greenbelt, Maryland, USA On Tue, 2002-10-08 at 15:48, Jesse Keating wrote: > On Tue, 8 Oct 2002 15:05:14 -0400 (EDT) > "Robert P. J. Day" <rpjday@mindspring.com> wrote: > > # ummmmm ... i'm pretty sure that, even though i had hdb=ide-scsi > # automatically added to grub.conf, that drive did *not* have DMA > # enabled until i did it explicitly. can anyone answer this > # definitively? > > The default is to enable DMA on harddisks, but not on CD-ROM devices. > You will have to manually edit either /etc/modules.conf (options > ide-cd dma=1) or /etc/sysconfig/harddiskhdX where X is your CD-ROM > device, hardiskhdc for /dev/hdc. > > -- > Jesse Keating > j2Solutions.net > Mondo DevTeam (www.mondorescue.org) > > Was I helpful? Let others know: > http://svcs.affero.net/rm.php?r=jkeating > > > > -- > Psyche-list mailing list > Psyche-list@redhat.com > https://listman.redhat.com/mailman/listinfo/psyche-list >
