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Re: Question about 2 DVD devices

From: Thomas Schmitt
Subject: Re: Question about 2 DVD devices
Date: Sat, 06 May 2023 08:57:36 +0200


Truong Thanh Quang wrote:
> "But meanwhile this has been fixed" means we can use /dev/sr normally now
> with Ubnuntu 22.04 (kernel 5.19)?

Yes. I noticed the fix with kernel 5.10 and found a corresponding commit
which probably went into 5.6.

> 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

That's only necessary with the older kernels which show the peculiar
symptom that two concurrent burn runs yield not more than 1x DVD speed.

As said, SCSI errors were not a symptom of that old i/o bottleneck.
They must have some other cause.

Have a nice day :)


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