External DVD burner - connected via USB.

[Cheffo]

O. Hartmann wrote:
> Stefan Lambrev wrote:
>>
>>
>> Daniel O'Connor wrote:
>>> On Wednesday 04 October 2006 20:33, Stefan Lambrev wrote:
>>>  
>>>> Is this supposed to work under FreeBSD 6.X amd64 at all ?
>>>>     
>>>
>>> Did you actually try using it?
>>>
>>>   
>> Of course :) and it does not work - can't mount, read, write and so on.
>> Checked under other os - it works so it is not HW problem.
>>
>> This is from mount:
>>
>> cd0 at umass-sim0 bus 0 target 0 lun 0
>> cd0: <PLEXTOR DVDR   PX-716AL 1.01> Removable CD-ROM SCSI-0 device
>> cd0: 40.000MB/s transfers
>> cd0: cd present [2295104 x 2048 byte records]
>> (cd0:umass-sim0:0:0:0): READ TOC/PMA/ATIP {MMC Proposed}. CDB: 43 0 0 
>> 0 0 0 1 0 c 0
>> (cd0:umass-sim0:0:0:0): CAM Status: SCSI Status Error
>> (cd0:umass-sim0:0:0:0): SCSI Status: Check Condition
>> (cd0:umass-sim0:0:0:0): ILLEGAL REQUEST asc:24,0
>> (cd0:umass-sim0:0:0:0): Invalid field in CDB
>> (cd0:umass-sim0:0:0:0): Unretryable error
>>
>> growisofs complains something about "non-MMC" compatible.
>>
>
> Even if you'll get it to work, don't expect a miracle! I use an 
> external USB 2.0 <-> SATA HDD system for backup purposes and even on a 
> fast AMD64 box, FreeBSD and USB perform really worse (not more than 10 
> MB/s ehci). Under high I/O (SATA harddrives) the box crashes sometimes 
> (FreeBSD 6.2-PRE/AMD64). If this happens when you burn DVD, it could 
> render the DVD unuseable.
Well I have worse experience with linux  when we talk about usb, SCSI 
and stability :)
and from what I hear there is a work in progress for usb in freebsd.
Also I'm quite happy with my external USB connected Light-On dvd burner.
Anyway I workaround this by connecting the plextor dvd burner direct to 
IDE cable
and with atapicam everything seems ok.
>
> regards,
> Oliver