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Re: Question about 2 DVD devices

From: Truong Thanh Quang
Subject: Re: Question about 2 DVD devices
Date: Sat, 6 May 2023 03:48:52 +0700

Hi Thomas,

Thanks for your prompt reply!
"But meanwhile this has been fixed" means we can use /dev/sr normally now with Ubnuntu 22.04 (kernel 5.19)?
Do I need to specify "-scsi_dev_family sg" to xorriso command like this one?
    xorriso -scsi_dev_family sg -dev /dev/sr0 -map ./data /data

Thanks alot,

On Fri, May 5, 2023 at 1:31 PM Thomas Schmitt <scdbackup@gmx.net> wrote:

Truong Thanh Quang wrote:
> I have 2 DVD-RW drives, Ubuntu 22.04. I need to write 2 DVD-R discs
> simultaneously.
> Sometimes, it finishes with an SCSI error.
> I wonder if xorriso can burn 2 DVD-Rs at the same time?

Yes, this is possible and i do it from time to time. Between Linux kernel
2.6 and 5.6 or 5.7 there was a throughput problem which could be
circumvented by using /dev/sg instead of /dev/sr. See
But meanwhile this has been fixed.

SCSI errors were not a symptom of that flaw. Normally they indicate
individual problems of the hardware.
If you show the particular error messages then i may be able to tell more.

Have a nice day :)


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