On Fri, 07 Dec 2007 20:44:45 +0000 Zan Lynx <zlynx@xxxxxxx> wrote: > I am not sure if this problem has been addressed already. I read some > about the fast-fail issues and this may be related? > > On nearly all my USB block devices, I have been getting zillions of I/O > errors. But they aren't real, they don't appear with 2.6.23 kernels. > > I can often read and write data to the device, but these IO errors cause > error aborts in user space applications in many cases, making it a > chancy thing to run backup software, for example. > > Here is a bit of dmesg from plugging in a perfectly good USB-2 flash > drive. > > hub 3-0:1.0: state 7 ports 6 chg 0000 evt 0004 > ehci_hcd 0000:00:02.2: GetStatus port 2 status 001803 POWER sig=j CSC CONNECT > hub 3-0:1.0: port 2, status 0501, change 0001, 480 Mb/s > hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x501 > ehci_hcd 0000:00:02.2: port 2 high speed > ehci_hcd 0000:00:02.2: GetStatus port 2 status 001005 POWER sig=se0 PE CONNECT > usb 3-2: new high speed USB device using ehci_hcd and address 9 > ehci_hcd 0000:00:02.2: port 2 high speed > ehci_hcd 0000:00:02.2: GetStatus port 2 status 001005 POWER sig=se0 PE CONNECT > usb 3-2: default language 0x0409 > usb 3-2: uevent > usb 3-2: usb_probe_device > usb 3-2: configuration #1 chosen from 1 choice > usb 3-2: adding 3-2:1.0 (config #1, interface 0) > usb 3-2:1.0: uevent > libusual 3-2:1.0: usb_probe_interface > libusual 3-2:1.0: usb_probe_interface - got id > usb-storage 3-2:1.0: usb_probe_interface > usb-storage 3-2:1.0: usb_probe_interface - got id > scsi4 : SCSI emulation for USB Mass Storage devices > drivers/usb/core/inode.c: creating file '009' > usb 3-2: New USB device found, idVendor=05dc, idProduct=a400 > usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > usb 3-2: Product: JUMPDRIVE > usb 3-2: Manufacturer: LEXAR MEDIA > usb 3-2: SerialNumber: 0A4EEC05201219080904 > usb-storage: device found at 9 > usb-storage: waiting for device to settle before scanning > usb-storage: device scan complete > scsi 4:0:0:0: Direct-Access LEXAR JUMPDRIVE 1000 PQ: 0 ANSI: 0 CCS > sd 4:0:0:0: [sdg] 2026592 512-byte hardware sectors (1038 MB) > sd 4:0:0:0: [sdg] Write Protect is off > sd 4:0:0:0: [sdg] Mode Sense: 43 00 00 00 > sd 4:0:0:0: [sdg] Assuming drive cache: write through > sd 4:0:0:0: [sdg] 2026592 512-byte hardware sectors (1038 MB) > sd 4:0:0:0: [sdg] Write Protect is off > sd 4:0:0:0: [sdg] Mode Sense: 43 00 00 00 > sd 4:0:0:0: [sdg] Assuming drive cache: write through > sdg: sdg1 > sd 4:0:0:0: [sdg] Attached SCSI removable disk > sd 4:0:0:0: Attached scsi generic sg7 type 0 > sd 4:0:0:0: [sdg] Result: hostbyte=0x01 driverbyte=0x00 > end_request: I/O error, dev sdg, sector 3984 Yes, this is breakage in the scsi tree. I believe that the offending patch has been found and I have a nasty fix somewhere in my inbox - it involves reverting a patch which doesn't revert properly. I haven't got onto looking at it yet, sorry. - 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
