[linux] cd vs mys

[Lubo Drobny]

mam dosku MSI 648 MAX s chisetom Sis 648 a IDE contr. Sis 963
toto kernel detekuje takto:

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with ideb
us=xx
SIS5513: IDE controller on PCI bus 00 dev 15
SIS5513: chipset revision 0
SIS5513: not 100% native mode: will probe irqs later
SiS5513
    ide0: BM-DMA at 0xff00-0xff07, BIOS settings: hda:DMA, hdb:DMA
    ide1: BM-DMA at 0xff08-0xff0f, BIOS settings: hdc:DMA, hdd:DMA
hda: WDC WD800JB-00CRA1, ATA DISK drive
hdc: TEAC CD-552E, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 156301488 sectors (80026 MB) w/8192KiB Cache, CHS=9729/255/63
Partition check:
 /dev/ide/host0/bus0/target0/lun0: p1 < p5 p6 p7 > p2 p4

co nie je asi idealne, preto musim dma enablovat cez hdparm, skusal som kernel 
z MD cooker a tam uz podpora pre 648 je a dma sa zapne automaticky - mys vsak 
poskakuje veselo dalej a robi to aj ked je dma na CDROM vypnute

lubo

>
> preco ? nemas ju tam defaultne? Toto moze byt dovod preco ti to blbne.
> ak nemas default DMA an CDROM zisti si preco - zisti ci mas v jadre podporu
> pre tvoj chipset, ci nemas option pre zapnutie DMA len pre disky...
>
> rozhodne nezapinaj podporu pre DMA len tak...