> I have a growisofs performance question. When I do > $ mksifos -R -J treename > /dev/null > it takes 21 minutes for some 3G of data (7 large and 7 small files). Same > when I redirect to some junk.iso file on a hard disk other than the one > holding the data. In both cases hard disk LED is lit all the time. > > However, when I do > $ growisofs -Z /dev/scd0 -speed=8 -R -J treename > it takes the whole 44 minutes. The reported average speed is about 0.8x, > and the hard disk LED is not lit 1/3 to half the time. It seems like > image-making and burning are taking turns. > [...] I am using ide-scsi access for the burner.
Besides Volker's idea about DMA i got a another suspicion : Is your burner at the same IDE controller as your source disk ? Is that fast other disk possibly at a different IDE controller ? I once experienced similar effects with a CD-Burner at hdb while its source disk was hda. Another effect was that hda stalled while hdb was blanking or fixating CDs. I swapped the burner with the second disk hdc and performance became acceptable (12x CD speed). After i then enabled DMA by hdparm -d1 /dev/hdc (despite ide-scsi) even my screen cursor moved smoothely while burning CDs. :)) Have a nice day :) Thomas -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
