First, I'd like to say that I know that the question is not laptop specific,
not even FC-specific, but I think there's a chance that someone can at least
show me a right place to investigate further.
To the point:
I use FC5 on Dell Inspiron E1505 (vel 6400) with ICH7 chipset. It has SATA
harddisk and IDE DVD drive.
CD/DVD burning is slow as well as playing DVDs, because DMA for this drive is
turned off and it's impossible to enable it.
There are some tips (rather old, for kernels<2.6.13 AFAIK) around. Eg.
adding 'hdc=noprobe' or 'combined_mode=libata' to kernel boot command line
that makes dvd drive to work in scsi-emulation mode.
And this is where my questions go:
1. What is the current status of ata_piix/libata, is there a work going on to
make it possible to enable DMA for IDE drive in native mode?
2. If scsi-emulation is still required to get reasonable transfers, what is
the right way to set it up?
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) Serial ATA
Storage Controller IDE (rev 01)
[root@moonstone ~]# hdparm -d1 /dev/hdc
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
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