Messages in this thread | | | Date | Fri, 04 Mar 2011 09:09:10 -0500 | From | Stephen Clark <> | Subject | Re: NEC ND-4550A problems reading DVD-R |
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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.
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