On Saturday 03 Apr 2004 12:12 pm, Wayne Stallwood wrote:
Do you have good 8x media?
I think I lost you there, I was referring to CD burning speeds, my poor ole drive can only handle 2x on DVD-R
Sorry, yes, got a bit muddled :-)
Hmmm a valid point about the 80 conductor cable, Maybe that's why DMA mode keeps dropping out on me, so used to my old optical drives that only need a 40 conductor that I may have overlooked that.
Will DMA still be an issue if the drive is seen as a scsi drive via ide-scsi (sorry, now gone past the limits of my knowledge here)? Does scsi use DMA?
I don't know enough about 4x/8x dvd data burning speeds to know if the ide bus speed can really be a bottleneck - can anyone give some info here please?
1X-CLV (1.385 MB/s) so 8X would be 11.08MB/s
ATA-1 4.16 MB/s ATA-2 16.67 MB/s ATA-3 (same as above but with SMART) ATA-4, ATA/33 UDMA 33.33 MB/s ATA-5, ATA/66 66.67 MB/s ATA-6 ATA/100 100MB/s and so on.
You are unlikely to encounter the first 3 in any machine running Linux today, so if the ATA interface is performing to spec (unlikely) and there is only one drive being accessed on each channel then No the bus shouldn't be a bottleneck.
Great, thanks for the info.
BTW, while we're on the topic, do you know what the data transfer speed for CD reading is? I've read that 1x DVD reading/writing is several times that of 1x CD data transfer but never seen the figures.
I just got 40 CDs of MP3s at very-acceptable 256k onto one DVD - and very pleased to find that my cheapo DVD player from Richer Sounds can handle MP3-DVD playback! Yes, it's fun when things *do work* sometimes :-)
Syd