* fwd: 2.4.27rc2, DVD-RW support broke DVD-RAM writes [not found] ` <20040731163334.GH23697@suse.de> @ 2004-08-01 14:17 ` Pat LaVarre [not found] ` <06E9D950-E3EF-11D8-B976-00039398BB5E@ieee.org> 0 siblings, 1 reply; 4+ messages in thread From: Pat LaVarre @ 2004-08-01 14:17 UTC (permalink / raw) To: linux-scsi >> With 2.4.27rc2 (and I assume anything later than pre5 - that's when >> DVD-RW got added) DVD-RAMs have become read-only. Opening a DVD-RAM >> for >> writing results in "EROFS (Read-only file system)" (reported by >> 'strace'. ... > let Pat fix it. Pat? I'll work first to duplicate this result, then try to fix it, maybe by deleting all set_disk_ro. I'll look for code that ends up rewriting both DVD-RAM and Iomega REV discs. > Also, any chance we get proper 'DVD-RAM is write-protected' support in > 2.4.x ? It'd be really nice if write()/open(O_WRONLY) would fail in > those cases. I'll try Iomega REV discs with the MMC PWP switch flipped on and off. > ... Please redirect me if need be. Pat LaVarre http://linux-pel.blog-city.com/read/754579.htm ^ permalink raw reply [flat|nested] 4+ messages in thread
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* Re: [usb-storage] 2.4.27rc2, DVD-RW support broke DVD-RAM writes [not found] ` <70B2077E-E401-11D8-B976-00039398BB5E@ieee.org> @ 2004-08-01 23:53 ` Matthew Dharm 2004-08-02 8:07 ` Jens Axboe 2004-08-16 17:07 ` Pat LaVarre 1 sibling, 1 reply; 4+ messages in thread From: Matthew Dharm @ 2004-08-01 23:53 UTC (permalink / raw) To: Pat LaVarre Cc: Jens Axboe, linux-scsi, usb-storage@lists.one-eyed-alien.net list [-- Attachment #1: Type: text/plain, Size: 1126 bytes --] On Sun, Aug 01, 2004 at 03:26:24PM -0600, Pat LaVarre wrote: > Jens A/ Matt D: > > Linux 2.4.27-rc4 and 2.4.26 do Not recognise USB DVD-RAM disc > rewritability, even though 2.4.27 has recognised USB Iomega REV disc > rewritability at least since -rc3. > > Q0: Agreed? I'll take your word for it. > Q1: Would you consider a promptly written patch to persuade 2.4.27-rc4 > to recognise USB DVD-RAM rewritability? Or is 2.4 development already > too over? I've turned over 2.4 maintance to Pete Zaitcev. > Q2: Where do you want the patch? In drivers/usb? In drivers/scsi? To me, it sounds like drivers/scsi would be better. Tho I can see good arguments for either location. > Q3: What patch do you want? Should we try op x5A after op x1A fails? > Or should we try only op x5A? Or should we try op x5A first? I would think on a SCSI Level 2 device, we should start with x5A. Matt -- Matthew Dharm Home: mdharm-usb@one-eyed-alien.net Maintainer, Linux USB Mass Storage Driver It was a new hope. -- Dust Puppy User Friendly, 12/25/1998 [-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --] ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [usb-storage] 2.4.27rc2, DVD-RW support broke DVD-RAM writes 2004-08-01 23:53 ` [usb-storage] " Matthew Dharm @ 2004-08-02 8:07 ` Jens Axboe 0 siblings, 0 replies; 4+ messages in thread From: Jens Axboe @ 2004-08-02 8:07 UTC (permalink / raw) To: Pat LaVarre, linux-scsi, usb-storage@lists.one-eyed-alien.net list On Sun, Aug 01 2004, Matthew Dharm wrote: > On Sun, Aug 01, 2004 at 03:26:24PM -0600, Pat LaVarre wrote: > > Jens A/ Matt D: > > > > Linux 2.4.27-rc4 and 2.4.26 do Not recognise USB DVD-RAM disc > > rewritability, even though 2.4.27 has recognised USB Iomega REV disc > > rewritability at least since -rc3. > > > > Q0: Agreed? > > I'll take your word for it. > > > Q1: Would you consider a promptly written patch to persuade 2.4.27-rc4 > > to recognise USB DVD-RAM rewritability? Or is 2.4 development already > > too over? > > I've turned over 2.4 maintance to Pete Zaitcev. I think this was a general question. If the patch is to go into 2.4.27-rc now, then it has to be to the point and straight forward (aka obviously correct). Otherwise we back it out, and get it fixed for 2.4.28-rc. > > Q2: Where do you want the patch? In drivers/usb? In drivers/scsi? > > To me, it sounds like drivers/scsi would be better. Tho I can see good > arguments for either location. Agree > > Q3: What patch do you want? Should we try op x5A after op x1A fails? > > Or should we try only op x5A? Or should we try op x5A first? > > I would think on a SCSI Level 2 device, we should start with x5A. Agree. But such a change alone means that it cannot go into 2.4.27, it has to be in 2.4.28-pre. -- Jens Axboe ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [usb-storage] 2.4.27rc2, DVD-RW support broke DVD-RAM writes [not found] ` <70B2077E-E401-11D8-B976-00039398BB5E@ieee.org> 2004-08-01 23:53 ` [usb-storage] " Matthew Dharm @ 2004-08-16 17:07 ` Pat LaVarre 1 sibling, 0 replies; 4+ messages in thread From: Pat LaVarre @ 2004-08-16 17:07 UTC (permalink / raw) To: usb-storage; +Cc: linux-scsi > drivers/scsi/sr.c ... vendor-specific op x1A > reaching the drive, by analogy with SPC op x1A "MODE SENSE (6)", in > place of the standard MMC op x5A "MODE SENSE (10)" ... I've now concretely proposed fixing this in drivers/scsi/. Subject: [PATCH 2.4] rewritable USB DVD-RAM vs. mode sense op choice http://marc.theaimsgroup.com/?l=linux-scsi&m=109267404822826 Of course I'll return to drivers/usb/storage/ if the drivers/scsi/ folk say I should. Pat LaVarre ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2004-08-16 17:08 UTC | newest]
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2004-08-01 14:17 ` fwd: 2.4.27rc2, DVD-RW support broke DVD-RAM writes Pat LaVarre
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2004-08-01 23:53 ` [usb-storage] " Matthew Dharm
2004-08-02 8:07 ` Jens Axboe
2004-08-16 17:07 ` Pat LaVarre
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