buffer starvation when recording DVDs
Alexander Best
alexbestms at uni-muenster.de
Wed Jul 14 21:58:32 UTC 2010
2010/7/14 Alexander Best <alexbestms at uni-muenster.de>:
> 2010/7/14 Paul B Mahol <onemda at gmail.com>:
>> On 7/14/10, Alexander Best <alexbestms at uni-muenster.de> wrote:
>>> 2010/7/14 Paul B Mahol <onemda at gmail.com>:
>>>> On Wed, Jul 14, 2010 at 1:25 PM, Alexander Best
>>>> <alexbestms at uni-muenster.de> wrote:
>>>>> 2010/7/14 Paul B Mahol <onemda at gmail.com>:
>>>>>> On Wed, Jul 14, 2010 at 12:46 PM, Alexander Best
>>>>>> <alexbestms at uni-muenster.de> wrote:
>>>>>>> 2010/7/14 Alexander Best <alexbestms at uni-muenster.de>:
>>>>>>>> hi there,
>>>>>>>>
>>>>>>>> my dvdr drive supports recording DVDs (both DVD-Rs and DVD+Rs) at a
>>>>>>>> maximum speed of 16x. however at speeds of more than ~12x the burner's
>>>>>>>> buffer get's filled only ~20%. probably that's why the burner's speed
>>>>>>>> get's reduced by `growisofs` (to prevent buffer starvation?). how can
>>>>>>>> this happen? the iso i am using lies on my HDD which is quite fast
>>>>>>>> (connected via SATA 2.0).
>>>>>>>>
>>>>>>>> this is the output of `camcontrol devlist -v`:
>>>>>>>>
>>>>>>>> scbus0 on ahcich0 bus 0:
>>>>>>>> <> at scbus0 target -1 lun -1 ()
>>>>>>>> scbus1 on ahcich1 bus 0:
>>>>>>>> <> at scbus1 target -1 lun -1 ()
>>>>>>>> scbus2 on ata2 bus 0:
>>>>>>>> <HL-DT-ST DVDRAM GSA-H10N JL12> at scbus2 target 0 lun 0
>>>>>>>> (cd0,pass0)
>>>>>>>> <> at scbus2 target -1 lun -1 ()
>>>>>>>> scbus3 on ahcich2 bus 0:
>>>>>>>> <SAMSUNG SP2504C VT100-50> at scbus3 target 0 lun 0
>>>>>>>> (ada0,pass1)
>>>>>>>> <> at scbus3 target -1 lun -1 ()
>>>>>>>> scbus4 on ahcich3 bus 0:
>>>>>>>> <> at scbus4 target -1 lun -1 ()
>>>>>>>> scbus5 on ahcich4 bus 0:
>>>>>>>> <> at scbus5 target -1 lun -1 ()
>>>>>>>> scbus6 on ahcich5 bus 0:
>>>>>>>> <> at scbus6 target -1 lun -1 ()
>>>>>>>> scbus7 on ahcich6 bus 0:
>>>>>>>> <> at scbus7 target -1 lun -1 ()
>>>>>>>> scbus8 on ahcich7 bus 0:
>>>>>>>> <> at scbus8 target -1 lun -1 ()
>>>>>>>> scbus-1 on xpt0 bus 0:
>>>>>>>> <> at scbus-1 target -1 lun -1 (xpt0)
>>>>>>>>
>>>>>>>> as you can see cd0 and ada0 don't share the same cable (cd0 is PATA,
>>>>>>>> ada0 is SATA). the PATA and SATA controllers are:
>>>>>>>>
>>>>>>>> atapci0: <JMicron JMB363 UDMA133 controller> port
>>>>>>>> 0xd000-0xd007,0xd100-0xd103,0xd200-0xd207,0xd300-0xd303,0xd400-0xd40f
>>>>>>>> irq 16 at device 0.1 on pci3
>>>>>>>>
>>>>>>>> ahci0: <JMicron JMB363 AHCI SATA controller> mem 0xf8000000-0xf8001fff
>>>>>>>> irq 19 at device 0.0 on pci3
>>>>>>>
>>>>>>> sorry for the wrong information. just realized my HDD is connected to
>>>>>>> the intel controller!
>>>>>>>
>>>>>>>>
>>>>>>>> this is the output of `growisofs`:
>>>>>>>>
>>>>>>>> Executing 'builtin_dd if=new.iso of=/dev/pass0 obs=32k seek=0'
>>>>>>>> /dev/pass0: "Current Write Speed" is 16.4x1352KBps.
>>>>>>>> 0/4695924736 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU
>>>>>>>> 0.0%
>>>>>>>> 0/4695924736 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU
>>>>>>>> 0.0%
>>>>>>>> 0/4695924736 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU
>>>>>>>> 0.0%
>>>>>>>> 0/4695924736 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU
>>>>>>>> 0.0%
>>>>>>>> 0/4695924736 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU
>>>>>>>> 0.0%
>>>>>>>> 0/4695924736 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU
>>>>>>>> 0.0%
>>>>>>>> 0/4695924736 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU
>>>>>>>> 0.0%
>>>>>>>> 1114112/4695924736 ( 0.0%) @0.2x, remaining 2036:44 RBU 100.0% UBU
>>>>>>>> 2.9%
>>>>>>>> 1114112/4695924736 ( 0.0%) @0.0x, remaining 2247:26 RBU 100.0% UBU
>>>>>>>> 100.0%
>>>>>>>> 19365888/4695924736 ( 0.4%) @4.0x, remaining 144:53 RBU 100.0% UBU
>>>>>>>> 100.0%
>>>>>>>> 52789248/4695924736 ( 1.1%) @7.2x, remaining 57:10 RBU 99.9% UBU
>>>>>>>> 100.0%
>>>>>>>> 86736896/4695924736 ( 1.8%) @7.4x, remaining 37:11 RBU 100.0% UBU
>>>>>>>> 100.0%
>>>>>>>> 121241600/4695924736 ( 2.6%) @7.5x, remaining 28:55 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 156336128/4695924736 ( 3.3%) @7.6x, remaining 23:42 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 191954944/4695924736 ( 4.1%) @7.7x, remaining 20:20 RBU 100.0% UBU
>>>>>>>> 100.0%
>>>>>>>> 228130816/4695924736 ( 4.9%) @7.8x, remaining 18:16 RBU 100.0% UBU
>>>>>>>> 100.0%
>>>>>>>> 264863744/4695924736 ( 5.6%) @8.0x, remaining 16:27 RBU 100.0% UBU
>>>>>>>> 100.0%
>>>>>>>> 298352640/4695924736 ( 6.4%) @7.3x, remaining 15:13 RBU 100.0% UBU
>>>>>>>> 100.0%
>>>>>>>> 336134144/4695924736 ( 7.2%) @8.2x, remaining 14:16 RBU 100.0% UBU
>>>>>>>> 100.0%
>>>>>>>> 374505472/4695924736 ( 8.0%) @8.3x, remaining 13:16 RBU 100.0% UBU
>>>>>>>> 100.0%
>>>>>>>> 413401088/4695924736 ( 8.8%) @8.4x, remaining 12:25 RBU 99.9% UBU
>>>>>>>> 100.0%
>>>>>>>> 452886528/4695924736 ( 9.6%) @8.6x, remaining 11:52 RBU 100.0% UBU
>>>>>>>> 100.0%
>>>>>>>> 492896256/4695924736 (10.5%) @8.7x, remaining 11:13 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 533495808/4695924736 (11.4%) @8.8x, remaining 10:39 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 574619648/4695924736 (12.2%) @8.9x, remaining 10:16 RBU 99.7% UBU
>>>>>>>> 100.0%
>>>>>>>> 616333312/4695924736 (13.1%) @9.0x, remaining 9:49 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 658538496/4695924736 (14.0%) @9.1x, remaining 9:24 RBU 100.0% UBU
>>>>>>>> 94.1%
>>>>>>>> 701366272/4695924736 (14.9%) @9.3x, remaining 9:06 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 744751104/4695924736 (15.9%) @9.4x, remaining 8:45 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 788660224/4695924736 (16.8%) @9.5x, remaining 8:25 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 833159168/4695924736 (17.7%) @9.6x, remaining 8:11 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 878182400/4695924736 (18.7%) @9.8x, remaining 7:53 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 923762688/4695924736 (19.7%) @9.9x, remaining 7:37 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 969932800/4695924736 (20.7%) @10.0x, remaining 7:25 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 1011908608/4695924736 (21.5%) @9.1x, remaining 7:13 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 1059094528/4695924736 (22.6%) @10.2x, remaining 6:58 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 1106903040/4695924736 (23.6%) @10.4x, remaining 6:48 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 1155203072/4695924736 (24.6%) @10.5x, remaining 6:35 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 1204092928/4695924736 (25.6%) @10.6x, remaining 6:22 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 1253507072/4695924736 (26.7%) @10.7x, remaining 6:13 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 1303511040/4695924736 (27.8%) @10.8x, remaining 6:01 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 1354039296/4695924736 (28.8%) @10.9x, remaining 5:50 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 1405124608/4695924736 (29.9%) @11.1x, remaining 5:41 RBU 100.0% UBU
>>>>>>>> 91.2%
>>>>>>>> 1456832512/4695924736 (31.0%) @11.2x, remaining 5:31 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 1509031936/4695924736 (32.1%) @11.3x, remaining 5:21 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 1561821184/4695924736 (33.3%) @11.4x, remaining 5:13 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 1615134720/4695924736 (34.4%) @11.6x, remaining 5:03 RBU 100.0% UBU
>>>>>>>> 91.2%
>>>>>>>> 1669005312/4695924736 (35.5%) @11.7x, remaining 4:53 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 1723465728/4695924736 (36.7%) @11.8x, remaining 4:46 RBU 100.0% UBU
>>>>>>>> 91.2%
>>>>>>>> 1778417664/4695924736 (37.9%) @11.9x, remaining 4:37 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 1834024960/4695924736 (39.1%) @12.0x, remaining 4:28 RBU 99.5% UBU
>>>>>>>> 97.1%
>>>>>>>> 1884389376/4695924736 (40.1%) @10.9x, remaining 4:22 RBU 100.0% UBU
>>>>>>>> 47.1%
>>>>>>>> 1941012480/4695924736 (41.3%) @12.3x, remaining 4:14 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 1998159872/4695924736 (42.6%) @12.4x, remaining 4:05 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 2055897088/4695924736 (43.8%) @12.5x, remaining 3:58 RBU 96.6% UBU
>>>>>>>> 94.1%
>>>>>>>> 2113961984/4695924736 (45.0%) @12.6x, remaining 3:50 RBU 100.0% UBU
>>>>>>>> 82.4%
>>>>>>>> 2172977152/4695924736 (46.3%) @12.8x, remaining 3:42 RBU 100.0% UBU
>>>>>>>> 79.4%
>>>>>>>> 2232188928/4695924736 (47.5%) @12.8x, remaining 3:36 RBU 100.0% UBU
>>>>>>>> 79.4%
>>>>>>>> 2292154368/4695924736 (48.8%) @13.0x, remaining 3:28 RBU 100.0% UBU
>>>>>>>> 73.5%
>>>>>>>> 2352218112/4695924736 (50.1%) @13.0x, remaining 3:21 RBU 99.9% UBU
>>>>>>>> 41.2%
>>>>>>>> 2406875136/4695924736 (51.3%) @11.8x, remaining 3:15 RBU 100.0% UBU
>>>>>>>> 23.5%
>>>>>>>> 2462351360/4695924736 (52.4%) @12.0x, remaining 3:09 RBU 100.0% UBU
>>>>>>>> 20.6%
>>>>>>>> 2512650240/4695924736 (53.5%) @10.9x, remaining 3:04 RBU 100.0% UBU
>>>>>>>> 20.6%
>>>>>>>> 2568781824/4695924736 (54.7%) @12.2x, remaining 2:58 RBU 99.8% UBU
>>>>>>>> 20.6%
>>>>>>>> 2625634304/4695924736 (55.9%) @12.3x, remaining 2:52 RBU 99.9% UBU
>>>>>>>> 20.6%
>>>>>>>> 2682814464/4695924736 (57.1%) @12.4x, remaining 2:46 RBU 100.0% UBU
>>>>>>>> 20.6%
>>>>>>>> 2740486144/4695924736 (58.4%) @12.5x, remaining 2:41 RBU 99.9% UBU
>>>>>>>> 20.6%
>>>>>>>> 2785411072/4695924736 (59.3%) @9.7x, remaining 2:37 RBU 99.5% UBU
>>>>>>>> 20.6%
>>>>>>>> 2840920064/4695924736 (60.5%) @12.0x, remaining 2:31 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 2896461824/4695924736 (61.7%) @12.0x, remaining 2:26 RBU 100.0% UBU
>>>>>>>> 94.1%
>>>>>>>> 2951970816/4695924736 (62.9%) @12.0x, remaining 2:21 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 3007479808/4695924736 (64.0%) @12.0x, remaining 2:15 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 3063021568/4695924736 (65.2%) @12.0x, remaining 2:11 RBU 99.8% UBU
>>>>>>>> 88.2%
>>>>>>>> 3118497792/4695924736 (66.4%) @12.0x, remaining 2:05 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 3174039552/4695924736 (67.6%) @12.0x, remaining 2:00 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 3229581312/4695924736 (68.8%) @12.0x, remaining 1:56 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 3285090304/4695924736 (70.0%) @12.0x, remaining 1:51 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 3340599296/4695924736 (71.1%) @12.0x, remaining 1:46 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 3396141056/4695924736 (72.3%) @12.0x, remaining 1:41 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 3451682816/4695924736 (73.5%) @12.0x, remaining 1:36 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 3507191808/4695924736 (74.7%) @12.0x, remaining 1:32 RBU 100.0% UBU
>>>>>>>> 94.1%
>>>>>>>> 3562733568/4695924736 (75.9%) @12.0x, remaining 1:27 RBU 100.0% UBU
>>>>>>>> 91.2%
>>>>>>>> 3618242560/4695924736 (77.1%) @12.0x, remaining 1:23 RBU 100.0% UBU
>>>>>>>> 91.2%
>>>>>>>> 3673784320/4695924736 (78.2%) @12.0x, remaining 1:18 RBU 100.0% UBU
>>>>>>>> 94.1%
>>>>>>>> 3729293312/4695924736 (79.4%) @12.0x, remaining 1:14 RBU 100.0% UBU
>>>>>>>> 94.1%
>>>>>>>> 3784835072/4695924736 (80.6%) @12.0x, remaining 1:09 RBU 100.0% UBU
>>>>>>>> 94.1%
>>>>>>>> 3840344064/4695924736 (81.8%) @12.0x, remaining 1:05 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 3895885824/4695924736 (83.0%) @12.0x, remaining 1:00 RBU 100.0% UBU
>>>>>>>> 70.6%
>>>>>>>> 3951427584/4695924736 (84.1%) @12.0x, remaining 0:56 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 4006936576/4695924736 (85.3%) @12.0x, remaining 0:51 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 4062478336/4695924736 (86.5%) @12.0x, remaining 0:47 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 4118020096/4695924736 (87.7%) @12.0x, remaining 0:43 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 4173529088/4695924736 (88.9%) @12.0x, remaining 0:39 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 4229103616/4695924736 (90.1%) @12.0x, remaining 0:34 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 4284579840/4695924736 (91.2%) @12.0x, remaining 0:30 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 4340154368/4695924736 (92.4%) @12.0x, remaining 0:26 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 4395663360/4695924736 (93.6%) @12.0x, remaining 0:22 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 4451237888/4695924736 (94.8%) @12.0x, remaining 0:18 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 4506779648/4695924736 (96.0%) @12.0x, remaining 0:13 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 4562321408/4695924736 (97.2%) @12.0x, remaining 0:09 RBU 99.9% UBU
>>>>>>>> 97.1%
>>>>>>>> 4617830400/4695924736 (98.3%) @12.0x, remaining 0:05 RBU 100.0% UBU
>>>>>>>> 97.1%
>>>>>>>> 4673372160/4695924736 (99.5%) @12.0x, remaining 0:01 RBU 67.3% UBU
>>>>>>>> 97.1%
>>>>>>>> builtin_dd: 2292944*2KB out @ average 9.9x1352KBps
>>>>>>>> /dev/pass0: flushing cache
>>>>>>>> /dev/pass0: closing track
>>>>>>>> /dev/pass0: closing disc
>>>>>>>>
>>>>>>>> i also noticed this output (console):
>>>>>>>>
>>>>>>>> (cd0:ata2:0:0:0): READ TOC/PMA/ATIP. CDB: 43 0 0 0 0 0 0 0 4 0
>>>>>>>> (cd0:ata2:0:0:0): CAM status: SCSI Status Error
>>>>>>>> (cd0:ata2:0:0:0): SCSI status: Check Condition
>>>>>>>> (cd0:ata2:0:0:0): SCSI sense: ILLEGAL REQUEST csi:43,0,0,e asc:24,0
>>>>>>>> (Invalid field in CDB): Command byte 6 is invalid
>>>>>>>> (cd0:ata2:0:0:0): READ TOC/PMA/ATIP. CDB: 43 0 0 0 0 0 0 0 4 0
>>>>>>>> (cd0:ata2:0:0:0): CAM status: SCSI Status Error
>>>>>>>> (cd0:ata2:0:0:0): SCSI status: Check Condition
>>>>>>>> (cd0:ata2:0:0:0): SCSI sense: ILLEGAL REQUEST csi:43,0,0,e asc:24,0
>>>>>>>> (Invalid field in CDB): Command byte 6 is invalid
>>>>>>>>
>>>>>>>> my motherboard features a second SATA controller:
>>>>>>>>
>>>>>>>> ahci1: <Intel ICH9 AHCI SATA controller> port
>>>>>>>> 0xe600-0xe607,0xe700-0xe703,0xe800-0xe807,0xe900-0xe903,0xea00-0xea1f
>>>>>>>> mem 0xf8206000-0xf82067ff irq 19 at device 31.2 on pci0
>>>>>>>
>>>>>>> this one!
>>>>>>>
>>>>>>>>
>>>>>>>> should i consider moving my hdd to this controller? i heard the
>>>>>>>> jmicron controllers don't work very well under freebsd.
>>>>>>>>
>>>>>>>> i'm running
>>>>>>>>
>>>>>>>> FreeBSD otaku 9.0-CURRENT FreeBSD 9.0-CURRENT #4 r209884: Sat Jul 10
>>>>>>>> 19:25:16 CEST 2010 root at otaku:/usr/obj/usr/src/sys/ARUNDEL amd64
>>>>>>>>
>>>>>>>> with
>>>>>>>>
>>>>>>>> options ATA_CAM
>>>>>>>>
>>>>>>>> in my kernel config.
>>>>>>>>
>>>>>>>> cheers.
>>>>>>>>
>>>>>>>> ps: during the `growisofs` session i made sure that no other
>>>>>>>> application was causing heavy HDD activity!!!
>>>>>>
>>>>>> How much is your HDD really fast(when reading that iso file)?
>>>>>
>>>>> dd if=/dev/ada0 of=/dev/null bs=1M count=4482
>>>>> 4482+0 records in
>>>>> 4482+0 records out
>>>>> 4699717632 bytes transferred in 66.619926 secs (70545224 bytes/sec)
>>>>>
>>>>
>>>> ISO file != start of disk
>>>
>>> oh sorry. here're a couple of different tests. i'm not sure if they
>>> are useful because of the effects of caching:
>>>
>>> dd if=/dev/cd0 of=./test.iso bs=2048
>>> 2293232+0 records in
>>> 2293232+0 records out
>>> 4696539136 bytes transferred in 1581.225780 secs (2970189 bytes/sec)
>>>
>>> dd if=test.iso of=/dev/null bs=1M
>>> 4478+1 records in
>>> 4478+1 records out
>>> 4696539136 bytes transferred in 101.192359 secs (46411994 bytes/sec)
>>>
>>> time cp test.iso /dev/null
>>> cp test.iso /dev/null 0,00s user 7,98s system 7% cpu 1:39,78 total
>>>
>>>>
>>>>>>
>>>>>> Usually when I use growisofs, files I burn are located on tmpfs or are
>>>>>> completly cached in VM (yes, that is hardcore)
>>>>>
>>>>> thanks for the hint. although i use tmpfs i only have 2GB of RAM.
>>>>> that's why an entire DVD image (4.377 GiB) cannot reside inside tmpfs
>>>>> (or any other memory backed fs) on my machine.
>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Alexander Best
>>>>>
>>>>
>>
>> I'm not really expert in those things, perhaps firmware for your
>> burner is not up to date or have some limitations.
>>
>> Can be anything from flaky disc being burned to cdrecord.
>> You are burning DVD-R or DVD+R?
>> You tested with other disc vendors to see if there is anything different ....
>
> i'm using DVD+Rs. unfortunately i don't have any DVD-Rs available
> right now. this might be an issue with growisofs. i'm not using
> cdrecord. i don't think it's capable of burning DVDs, but i might be
> wrong there.
>
> i guess i'll have to bite the bullet and run more tests. just thought
> this was a common issue and somebody already came up with a solution.
>
> thanks for your help.
>
> ps: i've added freebew-questions@
oopppsss...pressed the send button too early. ;) i was going to say:
i've added freebsd-questions@ to CC in case somebody else has the same problem.
>
>>
>
>
>
> --
> Alexander Best
>
--
Alexander Best
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