Before I go off to the computer store to replace a DVD

[Eric Anderson]

On 04/25/07 12:18, Nikolay Pavlov wrote:
> On Wednesday, 25 April 2007 at 13:22:13 +0200, Fabian Keil wrote:
>> Randall Stewart <rrs at cisco.com> wrote:
>>
>>> I have begun having difficulty with my DVD-backup that happens
>>> every night.
>>>
>>> It WAS working.. but now I am seeing (on creating my initial backup):
>>> ***************************************************************
>>> bash-lakerest.net: growisofs -Z /dev/cd0 -R -J backup_init.04-24-2007.gz
>>> Executing 'mkisofs -R -J backup_init.04-24-2007.gz | builtin_dd 
>>> of=/dev/pass0 obs=32k seek=0'
>>>    1.49% done, estimate finish Wed Apr 25 06:49:25 2007
>>>   99.60% done, estimate finish Wed Apr 25 06:50:20 2007
>>> Total translation table size: 0
>>> Total rockridge attributes bytes: 266
>>> Total directory bytes: 0
>>> Path table size(bytes): 10
>>> Max brk space used 3440e4
>>> 336353 extents written (656 MB)
>>> builtin_dd: 336368*2KB out @ average 5.8x1385KBps
>>> /dev/pass0: flushing cache
>>> :-( unable to TEST UNIT READY: Input/output error
>>> :-[ SYNCHRONOUS FLUSH CACHE failed with SK=2h/ASC=04h/ACQ=07h]: Resource 
>>> temporarily unavailable
>>> **********************************************************
>>> And on the console while its progressing:
>>> **********************************************************
>>> acd0: FAILURE - READ_TOC ILLEGAL REQUEST asc=0x24 as=0x00
>>> acd0: FAILURE - unknown CMD (0x03) HARDWARE ERROR asc=0x08 ascq=0x01
>>> acd0: FAILURE - WRITE_BIG ILLEGAL REQUEST asc=0x21 ascq=0x02
>>> **********************************************************
>>> When I try to "append" to the DVD:
>>> **********************************************************
>>>   :-(  unable to pread64(2) primary volume descriptor: Input/output error
>>>      you most likely want to use -Z option.
>>> backup complete Tue Apr 24 01:03:45 EDT 2007
>>> **********************************************************
>>>
>>> Now I would chalk this off to just a hardware failure (since it was
>>> working).. But when I try this on another machine that happens
>>> to have a DVD write... I get all the nice messages.. it completes
>>> with no errors .. and I can't mount the drive :-(
>>>
>>> The drive that errors is a SONY..
>>> 'SONY    ' 'DVD RW DRU-820A ' '1.0a' Removable CD-ROM
>>>
>>> On a 7.0 current machine.
>>>
>>> The one that does not error but does not let me mount things is:
>>>
>>> 'GENERIC ' 'DVD RW 8XMax    ' '140I' Removable CD-ROM
>>>
>>> On a 6.2 machine.
>>>
>>> Now it could be that both have failed.. my office is in
>>> a barn.. but it just seems strange to me .
>>>
>>>
>>> As anyone else seen these types of errors? should I just
>>> replace the drives?
>> I saw similar looking failure messages a few days ago with
>> cdrecord (burning DVDs) and if I remember correctly with
>> readcd as well (checking the burned discs).
>>
>> The created discs were OK though and I don't burn
>> that much, so the error messages might not be new.
>>
>> The drive is a LiteOn SOHW-1693S.
>>
>> Fabian
> 
> It's probably not related to this but i have 100% reproducable
> reboots (without any panics) every time i am starting k3b-1.0_1.
> I am using cdrtools-2.01_5


This issue has already been discussed at length on freebsd-scsi (I 
think) - check the archives there..

Eric