hdparm -d1 /dev/hdc

linuxnubx · 08-31-2004, 05:10 AM

So I try to turn on DMA for my cdrom, but it doesn't want to.

Code:

/dev/hdc:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)

Baldrick65 · 08-31-2004, 05:15 AM

What's the output of

Code:

hdparm -i /dev/hdc

Baldrick

linuxnubx · 08-31-2004, 05:34 AM

Code:

 Model=DR-6800TE, FwRev=VER 0J5A, SerialNo=
 Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=0kB, MaxMultSect=0
 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
 IORDY=yes, tPIO={min:227,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4
 DMA modes:  mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 udma2
 AdvancedPM=no

 * signifies the current active mode

Baldrick65 · 08-31-2004, 05:44 AM

Are you running hdparm as root? If I try to turn off dma as a normal user, I get

Code:

/dev/hdc:
 setting using_dma to 0 (off)
 HDIO_SET_DMA failed: Permission denied
 using_dma    =  1 (on)
[baldrick@localhost baldrick]$

However, if I try it as root, I get

Code:

[root@localhost baldrick]# /sbin/hdparm -d0 /dev/hdc

/dev/hdc:
 setting using_dma to 0 (off)
 using_dma    =  0 (off)
[root@localhost baldrick]#

Baldrick

linuxnubx · 08-31-2004, 05:48 AM

Nm. Got it. I just had to enable pci ide in my kernel... It acutally made my SLack a lot faster.

Baldrick65 · 08-31-2004, 05:50 AM

Glad you got it sorted ...

Baldrick