Re: NEC ND-4550A problems reading DVD-R
From: Stephen Clark
Date: Fri Mar 04 2011 - 09:21:12 EST
On 03/04/2011 06:07 AM, Tejun Heo wrote:
(cc'ing Jens and James)
On Tue, Mar 01, 2011 at 10:47:41AM -0500, Stephen Clark wrote:
On 03/01/2011 08:48 AM, Mark Lord wrote:
On 11-03-01 03:01 AM, Tejun Heo wrote:
..
I think that's determined by drivers/scsi/sr.h::SR_TIMEOUT which is
hardcoded to be 30 seconds. Maybe it's better to move it to use the
block parameter. Anyways, the drive actually takes longer than 30secs
to recognize the media?
That slow behaviour is not uncommon, especially as drives struggle
to recognize various forms of copy-protected media (DVD-Video).
A longer default, or tuneable timeout, would help.
I agree with Mark, this should be a user tuneable value. My 2006 LG
dvd-rw frequently times out
trying to identify the media. But after numerous timeout error
messages it usually suceeds.
I don't think it should be a user tunable value. It should be
something automatic. I mean, how many would know to go some cryptic
place and increase sr probing timeout?
At the same time, increasing it for other cases is quite unattractive,
so it probably would be a good idea to only use higher timeout value
for the TUR right after media presence change event.
Anyone interested in doing it?
Thanks.
I don't see this as being any different than all the other obfuscated
tunable values that already
exists. At least I could google or look around for a tunable and maybe
change it myself instead of having to
patch the source.
--
"They that give up essential liberty to obtain temporary safety,
deserve neither liberty nor safety." (Ben Franklin)
"The course of history shows that as a government grows, liberty
decreases." (Thomas Jefferson)
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