Re: Low burning speed
Thomas, you cracked me and i finally tried out cdrskin - it behaves just like growiso, first zone ok, second zone slowly.
Growis with option "speed=6" works properly, "speed=8" like without speed option. But what's interesting growiso+K3b and speed set at 6x records at 3.5 - 4x, when 8x is checked - first zone 3.5 - 4x, second 2.5 - 3x.
Another test you wanted me to do before:
tomasz@debian:~$ growisofs -Z /dev/dvd=/dev/zero
WARNING: /dev/dvd already carries isofs!
About to execute 'builtin_dd if=/dev/zero of=/dev/dvd obs=32k seek=0'
/dev/dvd: restarting DVD+RW format...
/dev/dvd: "Current Write Speed" is 8.2x1352KBps.
18153472/4700372992 ( 0.4%) @3.7x, remaining 25:47 RBU 100.0% UBU 3.8%
45907968/4700372992 ( 1.0%) @6.0x, remaining 15:12 RBU 100.0% UBU 65.4%
73596928/4700372992 ( 1.6%) @6.0x, remaining 12:34 RBU 100.0% UBU 92.3%
101318656/4700372992 ( 2.2%) @6.0x, remaining 12:06 RBU 100.0% UBU 96.2%
129040384/4700372992 ( 2.7%) @6.0x, remaining 11:13 RBU 100.0% UBU 96.2%
156729344/4700372992 ( 3.3%) @6.0x, remaining 10:37 RBU 100.0% UBU 92.3%
184451072/4700372992 ( 3.9%) @6.0x, remaining 10:36 RBU 100.0% UBU 96.2%
212172800/4700372992 ( 4.5%) @6.0x, remaining 10:13 RBU 100.0% UBU 88.5%
232062976/4700372992 ( 4.9%) @4.3x, remaining 10:16 RBU 100.0% UBU 96.2%
254279680/4700372992 ( 5.4%) @4.8x, remaining 10:29 RBU 100.0% UBU 46.2%
286949376/4700372992 ( 6.1%) @7.1x, remaining 9:59 RBU 100.0% UBU 19.2%
319488000/4700372992 ( 6.8%) @7.0x, remaining 9:49 RBU 100.0% UBU 19.2%
352157696/4700372992 ( 7.5%) @7.1x, remaining 9:27 RBU 100.0% UBU 19.2%
384696320/4700372992 ( 8.2%) @7.0x, remaining 9:09 RBU 100.0% UBU 19.2%
417366016/4700372992 ( 8.9%) @7.1x, remaining 9:03 RBU 100.0% UBU 19.2%
450002944/4700372992 ( 9.6%) @7.1x, remaining 8:48 RBU 100.0% UBU 23.1%
482574336/4700372992 (10.3%) @7.1x, remaining 8:35 RBU 100.0% UBU 23.1%
515112960/4700372992 (11.0%) @7.0x, remaining 8:31 RBU 100.0% UBU 23.1%
547782656/4700372992 (11.7%) @7.1x, remaining 8:20 RBU 100.0% UBU 26.9%
580419584/4700372992 (12.3%) @7.1x, remaining 8:09 RBU 100.0% UBU 23.1%
613056512/4700372992 (13.0%) @7.1x, remaining 8:06 RBU 100.0% UBU 23.1%
642514944/4700372992 (13.7%) @6.4x, remaining 7:59 RBU 100.0% UBU 26.9%
675119104/4700372992 (14.4%) @7.1x, remaining 7:51 RBU 100.0% UBU 23.1%
707657728/4700372992 (15.1%) @7.0x, remaining 7:48 RBU 100.0% UBU 19.2%
740327424/4700372992 (15.8%) @7.1x, remaining 7:40 RBU 100.0% UBU 23.1%
........................
4518215680/4700372992 (96.1%) @7.2x, remaining 0:19 RBU 100.0% UBU 26.9%
4551147520/4700372992 (96.8%) @7.1x, remaining 0:15 RBU 100.0% UBU 19.2%
4583194624/4700372992 (97.5%) @6.9x, remaining 0:12 RBU 100.0% UBU 19.2%
4616749056/4700372992 (98.2%) @7.3x, remaining 0:08 RBU 100.0% UBU 19.2%
4650139648/4700372992 (98.9%) @7.2x, remaining 0:05 RBU 100.0% UBU 19.2%
4683038720/4700372992 (99.6%) @7.1x, remaining 0:01 RBU 100.0% UBU 19.2%
:-[ WRITE@LBA=230540h failed with SK=5h/ASC=21h/ACQ=00h]: No space left on device
:-( write failed: No space left on device
/dev/dvd: flushing cache
/dev/dvd: stopping de-icing
/dev/dvd: writing lead-out
Findings of another test will be tomorrow
Tomasz
Dnia 31 marca 2008 16:42 "Thomas Schmitt" <scdbackup@gmx.net> napisał(a):
> Hi,
>
> > The main question is why does the system in question
> > discriminate DVD+RW in particular.
>
> That would be explainable by faulty firmware
> which switches speed too early.
>
> But why does it work with full speed when
> cdrecord is used ?
> Especially with DVD+RW it is not very likely
> that any SCSI command before writing
> would influence the drive as observed by Tomasz.
> The drive only announces two speeds.
> None of them is below 6x.
> So growisofs should be unable to make it run slower.
>
>
> That's why i propose a test with cdrskin.
> (Elsewise growisofs is at least as capable with
> DVD as is cdrskin.)
>
> I forgot to propose a test with plain operating
> system driver:
> time dd if=/dev/zero of=/dev/hdc bs=1M count=1000
>
> The measured time and the size of 1000 MiB would
> allow to compute the average speed.
>
>
> Have a nice day :)
>
> Thomas
>
>
> --
> To UNSUBSCRIBE, email to cdwrite-REQUEST@other.debian.org
> with a subject of "unsubscribe". Trouble? Contact listmaster@other.debian.org
>
>
Reply to: