when i do 'hdparm -d 1 /dev/hda', i get
/dev/hda:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
my controller is a PIIX4, the disk is an IBM DJSA-220 (2.5" laptop
drive, 20GB).
is there any way to reenable DMA on this disk? according to 'hdparm
-t -T' while booted single-user, i get about 6MB/s without DMA (under
2.4), and about 17MB/s with (under 2.2).
tia, and sorry if it's a faq i couldn't dig up,
ian
-- ---- Ian Soboroff ian@cs.umbc.edu University of MD Baltimore County http://www.cs.umbc.edu/~ian - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/