On Mon, Oct 27, 2008 at 10:24:14AM -0400, Alan Stern wrote: > On Mon, 27 Oct 2008, Luciano Rocha wrote: > > > On Sat, Oct 25, 2008 at 03:50:07PM -0400, Alan Stern wrote: > > > On Sat, 25 Oct 2008, Rafael J. Wysocki wrote: > > > > > > > [Adding CCs] > > > > > > > > On Wednesday, 22 of October 2008, Luciano Rocha wrote: > > > > > > > > > > Hello, > > > > > > > > > > An external HDD, usb-encased, works fine under 2.6.26.5, but under > > > > > 2.6.27.2 I get hundreds of errors per second, of 'No Sense [current]'. > > > > > > You can use usbmon to capture the details of what happens when you plug > > > in the drive. Instructions are in the kernel source file > > > Documentation/usb/usbmon.txt. > > > > > > > Now in 2.6.27.4, same problem. The usb traffic is: > > This looks exactly like the "infinite retry" problem I warned about > earlier. Here are the important parts of the log. For people who > don't know how to interpret these messages, the CDB starts in the 16th > byte of the 31-byte messages. For example, the first command here > starts with 0x25 and so it is READ CAPACITY: > > > f21e7cc0 3570408174 S Bo:1:008:1 -115 31 = 55534243 06000000 08000000 80000a25 00000000 00000000 00000000 000000 > > f21e7cc0 3570408264 C Bo:1:008:1 0 31 > > > f21e72c0 3570408280 S Bi:1:008:2 -115 8 < > > f21e72c0 3570408389 C Bi:1:008:2 0 8 = 2e9390b0 00000200 > > f21e7cc0 3570408400 S Bi:1:008:2 -115 13 < > > f21e7cc0 3570408513 C Bi:1:008:2 0 13 = 55534253 06000000 00000000 00 > > The response is 0x2e9390b0. In typical broken fashion, that is > undoubtedly the total number of sectors rather than the highest sector > number. > > Later on the system tries to read the contents of what it thinks is the > last sector: Hm, where in the code can I change it to return less that what it thinks is the last sector? <snip> > > There's a patch which might help resolve this problem: > > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=8bfa24727087d7252f9ecfb5fea2dfc92d797fbd > No luck. I'm going to try 2.6.28-rc2 now. Regards, Luciano Rocha -- Luciano Rocha <luciano@xxxxxxxxxxx> Eurotux Informática, S.A. <http://www.eurotux.com/> -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
