V po, 15. 03. 2004 v 15:35, Pim van Pelt píše: > | It have 1.06 firmware (flashed yesterday, before I used 1.04) and it's > | alone as a secondary master. I can't check hardware revision because I'm > | in different part of city now. > Mine is secondary master, with a DVDROM as slave. This has been the case > for quite some time now. Should not matter. > | > It has set the speed to 4.0x. If I then burn without -speed= setting, > | > my first DVD turns into a coaster. > | > | And if you let the unit do 8.0x, the result is good? > It burns, but not very fast. It starts burning at 6.1x, for a set amount > of sectors, and then switches to a higher rotational speed (with even > more lousy performance): > > 743997440/4633516032 (16.1%) @2.8x, remaining 17:20 > 758054912/4633516032 (16.4%) @3.0x, remaining 17:17 > 771522560/4633516032 (16.7%) @2.8x, remaining 17:11 > 785645568/4633516032 (17.0%) @3.0x, remaining 17:03 > 790134784/4633516032 (17.1%) @0.9x, remaining 17:16 <-- speed switch > 794886144/4633516032 (17.2%) @1.0x, remaining 17:23 > 801112064/4633516032 (17.3%) @1.3x, remaining 17:32 > 807174144/4633516032 (17.4%) @1.3x, remaining 17:37 > 813367296/4633516032 (17.6%) @1.3x, remaining 17:41 > 820445184/4633516032 (17.7%) @1.5x, remaining 17:48 > > It does complete succesfully though. mediainfo then shows (on the > completed DVD+R): Now this is really interesting, I wonder what Andy can comment on this. I've seen similar behaviour in review of SONY DRU-530 (same chipset) - at certain point in recording it drops speed and do weird stuff. > For what it's worth, this is a Celeron @1333MHz, with an ata100 disk > containing the image and an AtlasV to boot from (on aic7890); the box > burns true 4x media perfectly on 4x speed. It's the "4x media with 8x in > mediadescriptor" that it borks on. Ah. I ever only burned 4x -R. Looks like I have to get some +R for testing. > Recently my 4x speed Platinum media turns out to have a mediadescriptor with > 8x in it.. this is when the problems started, because the drive will then > start burning at 6x or 8x, messing up throughput. You can see the led blinking > rapidly in orange and then pausing a bit (green), perhaps because the drive > cannot keep up the high pace. Green blicking signals buffer underrun. Are you sure you can feed data to your unit at 8.0x speed? Even 4.0x is quite a load for my 5.2.1 box (much faster than yours). -- Pav Lucistnik <firstname.lastname@example.org> <pav@FreeBSD.org> May the Valar protect you on your path under the sky.
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