[linux-scsi dropped, this is not a scsi or uas problem.] On 7 Sep 2014, nix@xxxxxxxxxxxxx stated: > And... now it works, at least well enough to get a device file. So it's > not the disk that's at fault: it's the no-name hub! (Which is, I think, > USB ID 2109:0811 -- at least two instances of this disappear when I > unplug the hub.) Confirmed. Plugging a known-good (non-UAS) disk into the questionable hub yields this mass of screaming: Sep 7 23:19:29 mutilate info: : [ 161.026517] usb 6-1.1.2: new SuperSpeed USB device number 5 using xhci_hcd Sep 7 23:19:29 mutilate info: : [ 161.041767] usb-storage 6-1.1.2:1.0: USB Mass Storage device detected Sep 7 23:19:29 mutilate info: : [ 161.043404] scsi8 : usb-storage 6-1.1.2:1.0 Sep 7 23:19:30 mutilate notice: : [ 162.046725] scsi 8:0:0:0: Direct-Access WD My Book 1140 1012 PQ: 0 ANSI: 6 Sep 7 23:19:30 mutilate notice: : [ 162.048476] scsi 8:0:0:1: Enclosure WD SES Device 1012 PQ: 0 ANSI: 6 Sep 7 23:19:30 mutilate notice: : [ 162.056190] sd 8:0:0:0: [sdc] Spinning up disk... Sep 7 23:19:30 fold warning: : [198061.014106] packet denied IN=bdsl OUT= MAC=00:00:24:cb:c6:a2:50:67:f0:8c:bf:8f:08:00 SRC=109.120.181.179 DST=81.187.191.133 LEN=28 TOS=0x00 PREC=0x00 TTL=249 ID=32820 PROTO=UDP SPT=54 642 DPT=623 LEN=8 Sep 7 23:19:39 mutilate warning: : [ 163.058746] .........ready Sep 7 23:19:39 mutilate notice: : [ 171.085320] sd 8:0:0:0: [sdc] 3906963456 512-byte logical blocks: (2.00 TB/1.81 TiB) Sep 7 23:19:39 mutilate notice: : [ 171.087788] sd 8:0:0:0: [sdc] Write Protect is off Sep 7 23:19:39 mutilate err: : [ 171.090237] sd 8:0:0:0: [sdc] No Caching mode page found Sep 7 23:19:39 mutilate err: : [ 171.091720] sd 8:0:0:0: [sdc] Assuming drive cache: write through Sep 7 23:19:39 mutilate info: : [ 171.113631] sdc: sdc1 Sep 7 23:19:39 mutilate notice: : [ 171.117370] sd 8:0:0:0: [sdc] Attached SCSI disk Sep 7 23:19:40 mutilate info: : [ 171.525994] usb 6-1.1.2: reset SuperSpeed USB device number 5 using xhci_hcd Sep 7 23:19:40 mutilate warning: : [ 171.538771] xhci_hcd 0000:04:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88041b9efb40 Sep 7 23:19:40 mutilate warning: : [ 171.540317] xhci_hcd 0000:04:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88041b9efb88 Sep 7 23:19:40 mutilate info: : [ 171.807110] usb 6-1.1.2: reset SuperSpeed USB device number 5 using xhci_hcd Sep 7 23:19:40 mutilate warning: : [ 171.819716] xhci_hcd 0000:04:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88041b9efb40 Sep 7 23:19:40 mutilate warning: : [ 171.821277] xhci_hcd 0000:04:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88041b9efb88 Sep 7 23:19:40 mutilate info: : [ 172.082789] usb 6-1.1.2: reset SuperSpeed USB device number 5 using xhci_hcd Sep 7 23:19:40 mutilate warning: : [ 172.095409] xhci_hcd 0000:04:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88041b9efb40 Sep 7 23:19:40 mutilate warning: : [ 172.097043] xhci_hcd 0000:04:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88041b9efb88 Sep 7 23:19:50 fold warning: : [198080.980957] packet denied IN=bdsl OUT= MAC=00:00:24:cb:c6:a2:50:67:f0:8c:bf:8f:08:00 SRC=71.6.165.200 DST=81.187.191.133 LEN=40 TOS=0x00 PREC=0x00 TTL=111 ID=8287 PROTO=TCP SPT=7987 D PT=7071 WINDOW=60597 RES=0x00 SYN URGP=0 Sep 7 23:19:56 mutilate info: : [ 188.333974] EXT4-fs (sdc1): mounted filesystem without journal. Opts: (null) Sep 7 23:19:59 mutilate info: : [ 190.584332] usb 6-1.1.2: reset SuperSpeed USB device number 5 using xhci_hcd Sep 7 23:19:59 mutilate warning: : [ 190.597220] xhci_hcd 0000:04:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88041b9efb40 Sep 7 23:19:59 mutilate warning: : [ 190.598996] xhci_hcd 0000:04:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88041b9efb88 Sep 7 23:19:59 mutilate info: : [ 190.602042] sd 8:0:0:0: [sdc] Unhandled error code Sep 7 23:19:59 mutilate info: : [ 190.603677] sd 8:0:0:0: [sdc] Sep 7 23:19:59 mutilate warning: : [ 190.605251] Result: hostbyte=0x07 driverbyte=0x00 Sep 7 23:19:59 mutilate info: : [ 190.606861] sd 8:0:0:0: [sdc] CDB: Sep 7 23:19:59 mutilate warning: : [ 190.608456] cdb[0]=0x28: 28 00 27 00 0c 18 00 00 f0 00 Sep 7 23:19:59 mutilate err: : [ 190.610124] end_request: I/O error, dev sdc, sector 654314520 So either the hub is shagged, or the new USB extension cable that is the only way either of these drives can physically reach the hub is shagged. You'd think they wouldn't make hubs so bad that USB mass storage didn't work, so maybe it's the cable? I'll see if the new drive actually works well enough to not get horribly corrupted doing a backup tomorrow :) if it does, I guess Alexandre's bug is kind of fixed after all, maybe? At least with my slightly different drive. -- NULL && (void) -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html