I've noticed that my boot messages say that DMA is disabled for my
2nd and 3rd hard disks. Is it safe for me to enable DMA (via hdparm)
for these drive models or should I stick to none-DMA mode?
Please Cc: to me as I am not on this list.
Here are the relevant lines from the kernel boot messages:
PIIX4: IDE controller on PCI bus 00 dev 39
PIIX4: not 100% native mode: will probe irqs later
ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:pio, hdb:pio
ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio
hda: WDC AC24300L, ATA DISK drive
hdb: WDC AC33100H, ATA DISK drive
hdc: WDC AC31600H, ATA DISK drive
hdd: CREATIVECD1620E, ATAPI CDROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: WDC AC24300L, 4112MB w/256kB Cache, CHS=524/255/63, UDMA
hdb: Disabling (U)DMA for WDC AC33100H
hdb: DMA disabled
hdb: WDC AC33100H, 3020MB w/128kB Cache, CHS=767/128/63
hdc: Disabling (U)DMA for WDC AC31600H
hdc: DMA disabled
hdc: WDC AC31600H, 1549MB w/128kB Cache, CHS=3148/16/63
hdd: ATAPI 16X CD-ROM drive, 240kB Cache
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/