I'm unable to get a Addronics 5-Port HPM-XU (USB/ESATA) port multiplier to work on Fedora-16. If I plug 2 identical disks into it, it doesn't work. If I plug either of those disks in by themselves, it works. I'm plugging the Port Multiplier in via USB2 cable to a USB2 port. The disks are all plugged into the Port Multiplier via direct SATA cables. Other people report it works just fine under fedora 14 and 16, but I get the same errors more or less on three completely different linux systems. Works fine on one of those system while its running windows 7. Is this a USB2 vs USB3 thing? The box claims "Any ESATA or USB 3.0/2.0 port". Different USB hardware? Below is the truncated (it goes on forever) log from plugging in two disks. Anyone have any ideas what I should do: Jan 2 15:26:08 comonad kernel: [ 561.972132] usb 2-6: new high speed USB device number 3 using ehci_hcd Jan 2 15:26:08 comonad kernel: [ 562.087108] usb 2-6: New USB device found, idVendor=152d, idProduct=0539 Jan 2 15:26:08 comonad kernel: [ 562.087117] usb 2-6: New USB device strings: Mfr=10, Product=11, SerialNumber=5 Jan 2 15:26:08 comonad kernel: [ 562.087124] usb 2-6: Product: USB to ATA/ATAPI Bridge Jan 2 15:26:08 comonad kernel: [ 562.087131] usb 2-6: Manufacturer: JMicron Jan 2 15:26:08 comonad kernel: [ 562.087135] usb 2-6: SerialNumber: 000000000000 Jan 2 15:26:08 comonad mtp-probe: checking bus 2, device 3: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-6" Jan 2 15:26:08 comonad mtp-probe: bus: 2, device: 3 was not an MTP device Jan 2 15:26:08 comonad kernel: [ 562.366948] Initializing USB Mass Storage driver... Jan 2 15:26:08 comonad kernel: [ 562.367522] scsi6 : usb-storage 2-6:1.0 Jan 2 15:26:08 comonad kernel: [ 562.367803] usbcore: registered new interface driver usb-storage Jan 2 15:26:08 comonad kernel: [ 562.367808] USB Mass Storage support registered. Jan 2 15:26:11 comonad kernel: [ 565.387599] scsi 6:0:0:0: Direct-Access WDC WD50 00AAKX-001CA0 0X00 PQ: 0 ANSI: 6 Jan 2 15:26:13 comonad kernel: [ 567.407529] scsi 6:0:0:1: Direct-Access WDC WD50 00AAKX-001CA0 0X00 PQ: 0 ANSI: 6 Jan 2 15:26:13 comonad kernel: [ 567.411243] sd 6:0:0:0: Attached scsi generic sg2 type 0 Jan 2 15:26:13 comonad kernel: [ 567.412097] sd 6:0:0:1: Attached scsi generic sg3 type 0 Jan 2 15:26:17 comonad kernel: [ 571.448589] sd 6:0:0:1: [sdc] 976773168 512-byte logical blocks: (500 GB/465 GiB) Jan 2 15:26:17 comonad kernel: [ 571.449168] sd 6:0:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/465 GiB) Jan 2 15:26:17 comonad kernel: [ 571.449927] sd 6:0:0:1: [sdc] Write Protect is off Jan 2 15:26:17 comonad kernel: [ 571.450709] sd 6:0:0:0: [sdb] Write Protect is off Jan 2 15:26:17 comonad kernel: [ 571.451558] sd 6:0:0:1: [sdc] No Caching mode page present Jan 2 15:26:17 comonad kernel: [ 571.451566] sd 6:0:0:1: [sdc] Assuming drive cache: write through Jan 2 15:26:17 comonad kernel: [ 571.452653] sd 6:0:0:0: [sdb] No Caching mode page present Jan 2 15:26:17 comonad kernel: [ 571.452661] sd 6:0:0:0: [sdb] Assuming drive cache: write through Jan 2 15:26:17 comonad kernel: [ 571.456455] sd 6:0:0:0: [sdb] No Caching mode page present Jan 2 15:26:17 comonad kernel: [ 571.456463] sd 6:0:0:0: [sdb] Assuming drive cache: write through Jan 2 15:26:17 comonad kernel: [ 571.457336] sd 6:0:0:1: [sdc] No Caching mode page present Jan 2 15:26:17 comonad kernel: [ 571.457345] sd 6:0:0:1: [sdc] Assuming drive cache: write through Jan 2 15:26:17 comonad kernel: [ 571.574070] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:18 comonad kernel: [ 571.826066] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:18 comonad kernel: [ 572.051065] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:18 comonad kernel: [ 572.168222] sdb: sdb1 Jan 2 15:26:18 comonad kernel: [ 572.170918] sd 6:0:0:0: [sdb] No Caching mode page present Jan 2 15:26:18 comonad kernel: [ 572.170922] sd 6:0:0:0: [sdb] Assuming drive cache: write through Jan 2 15:26:18 comonad kernel: [ 572.170925] sd 6:0:0:0: [sdb] Attached SCSI disk Jan 2 15:26:18 comonad kernel: [ 572.276094] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:18 comonad ata_id[2367]: HDIO_GET_IDENTITY failed for '/dev/sdb': Invalid argument Jan 2 15:26:18 comonad kernel: [ 572.501062] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:19 comonad kernel: [ 572.733085] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:19 comonad kernel: [ 572.847545] sd 6:0:0:1: [sdc] Unhandled error code Jan 2 15:26:19 comonad kernel: [ 572.847549] sd 6:0:0:1: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK Jan 2 15:26:19 comonad kernel: [ 572.847553] sd 6:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jan 2 15:26:19 comonad kernel: [ 572.847561] end_request: I/O error, dev sdc, sector 0 Jan 2 15:26:19 comonad kernel: [ 572.847565] Buffer I/O error on device sdc, logical block 0 Jan 2 15:26:19 comonad kernel: [ 572.952065] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:19 comonad kernel: [ 573.177038] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:19 comonad kernel: [ 573.401074] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:19 comonad kernel: [ 573.625067] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:20 comonad kernel: [ 573.849103] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:20 comonad kernel: [ 574.073101] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:20 comonad kernel: [ 574.187594] sd 6:0:0:1: [sdc] Unhandled error code Jan 2 15:26:20 comonad kernel: [ 574.187603] sd 6:0:0:1: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK Jan 2 15:26:20 comonad kernel: [ 574.187613] sd 6:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jan 2 15:26:20 comonad kernel: [ 574.187636] end_request: I/O error, dev sdc, sector 0 Jan 2 15:26:20 comonad kernel: [ 574.187644] Buffer I/O error on device sdc, logical block 0 Jan 2 15:26:20 comonad kernel: [ 574.292078] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:20 comonad kernel: [ 574.516111] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:21 comonad kernel: [ 574.764114] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:21 comonad kernel: [ 574.988106] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:21 comonad kernel: [ 575.214123] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:21 comonad kernel: [ 575.438024] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:21 comonad kernel: [ 575.553633] sd 6:0:0:1: [sdc] Unhandled error code Jan 2 15:26:21 comonad kernel: [ 575.553637] sd 6:0:0:1: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK Jan 2 15:26:21 comonad kernel: [ 575.553641] sd 6:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jan 2 15:26:21 comonad kernel: [ 575.553650] end_request: I/O error, dev sdc, sector 0 Jan 2 15:26:21 comonad kernel: [ 575.553654] Buffer I/O error on device sdc, logical block 0 Jan 2 15:26:21 comonad kernel: [ 575.658121] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:22 comonad kernel: [ 575.882090] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:22 comonad kernel: [ 576.106078] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:22 comonad kernel: [ 576.330076] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:22 comonad kernel: [ 576.554072] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:23 comonad kernel: [ 576.778063] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:23 comonad kernel: [ 576.893548] sd 6:0:0:1: [sdc] Unhandled error code Jan 2 15:26:23 comonad kernel: [ 576.893551] sd 6:0:0:1: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK Jan 2 15:26:23 comonad kernel: [ 576.893556] sd 6:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jan 2 15:26:23 comonad kernel: [ 576.893566] end_request: I/O error, dev sdc, sector 0 Jan 2 15:26:23 comonad kernel: [ 576.893570] Buffer I/O error on device sdc, logical block 0 Jan 2 15:26:23 comonad kernel: [ 576.998058] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:23 comonad kernel: [ 577.222067] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:23 comonad kernel: [ 577.447093] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:23 comonad kernel: [ 577.672074] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:24 comonad kernel: [ 577.786971] EXT4-fs (sdb1): mounting ext3 file system using the ext4 subsystem Jan 2 15:26:24 comonad kernel: [ 577.896071] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:24 comonad kernel: [ 578.120088] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:24 comonad kernel: [ 578.234578] sd 6:0:0:1: [sdc] Unhandled error code Jan 2 15:26:24 comonad kernel: [ 578.234581] sd 6:0:0:1: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK Jan 2 15:26:24 comonad kernel: [ 578.234585] sd 6:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jan 2 15:26:24 comonad kernel: [ 578.234594] end_request: I/O error, dev sdc, sector 0 Jan 2 15:26:24 comonad kernel: [ 578.234599] Buffer I/O error on device sdc, logical block 0 Jan 2 15:26:24 comonad kernel: [ 578.339066] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:24 comonad kernel: [ 578.571060] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:25 comonad kernel: [ 578.802069] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:25 comonad kernel: [ 578.917894] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null) Jan 2 15:26:25 comonad kernel: [ 579.028087] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:25 comonad kernel: [ 579.258061] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:25 comonad kernel: [ 579.482065] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:25 comonad kernel: [ 579.596616] sd 6:0:0:1: [sdc] Unhandled error code Jan 2 15:26:25 comonad kernel: [ 579.596620] sd 6:0:0:1: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK Jan 2 15:26:25 comonad kernel: [ 579.596624] sd 6:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jan 2 15:26:25 comonad kernel: [ 579.596633] end_request: I/O error, dev sdc, sector 0 Jan 2 15:26:25 comonad kernel: [ 579.596637] Buffer I/O error on device sdc, logical block 0 Jan 2 15:26:25 comonad kernel: [ 579.700090] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:26 comonad kernel: [ 579.924091] usb 2-6: reset high speed USB device number 3 using ehci_hcd Jan 2 15:26:26 comonad kernel: [ 580.148104] usb 2-6: USB disconnect, device number 3 Jan 2 15:26:26 comonad kernel: [ 580.154063] sd 6:0:0:1: [sdc] Unhandled error code Jan 2 15:26:26 comonad kernel: [ 580.154067] sd 6:0:0:1: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK Jan 2 15:26:26 comonad kernel: [ 580.154071] sd 6:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jan 2 15:26:26 comonad kernel: [ 580.154081] end_request: I/O error, dev sdc, sector 0 Jan 2 15:26:26 comonad kernel: [ 580.154086] Buffer I/O error on device sdc, logical block 0 Jan 2 15:26:26 comonad kernel: [ 580.154119] Dev sdc: unable to read RDB block 0 Jan 2 15:26:26 comonad kernel: [ 580.154167] sd 6:0:0:1: [sdc] Unhandled error code Jan 2 15:26:26 comonad kernel: [ 580.154169] sd 6:0:0:1: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK Jan 2 15:26:26 comonad kernel: [ 580.154172] sd 6:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jan 2 15:26:26 comonad kernel: [ 580.154180] end_request: I/O error, dev sdc, sector 0 Jan 2 15:26:26 comonad kernel: [ 580.154183] Buffer I/O error on device sdc, logical block 0 Jan 2 15:26:26 comonad kernel: [ 580.154241] sd 6:0:0:1: [sdc] Unhandled error code Jan 2 15:26:26 comonad kernel: [ 580.154244] sd 6:0:0:1: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK Jan 2 15:26:26 comonad kernel: [ 580.154247] sd 6:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jan 2 15:26:26 comonad kernel: [ 580.154256] end_request: I/O error, dev sdc, sector 0 Jan 2 15:26:26 comonad kernel: [ 580.154258] Buffer I/O error on device sdc, logical block 0 Jan 2 15:26:26 comonad kernel: [ 580.154285] sdc: unable to read partition table Jan 2 15:26:26 comonad kernel: [ 580.154433] sd 6:0:0:1: [sdc] READ CAPACITY failed Jan 2 15:26:26 comonad kernel: [ 580.154436] sd 6:0:0:1: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK Jan 2 15:26:26 comonad kernel: [ 580.154439] sd 6:0:0:1: [sdc] Sense not available. Jan 2 15:26:26 comonad kernel: [ 580.154462] sd 6:0:0:1: [sdc] Write Protect is on Jan 2 15:26:26 comonad kernel: [ 580.154478] sd 6:0:0:1: [sdc] Asking for cache data failed Jan 2 15:26:26 comonad kernel: [ 580.154480] sd 6:0:0:1: [sdc] Assuming drive cache: write through Jan 2 15:26:26 comonad kernel: [ 580.154483] sd 6:0:0:1: [sdc] Attached SCSI disk Jan 2 15:26:26 comonad kernel: [ 580.190287] Buffer I/O error on device sdb1, logical block 0 <-------- SNIP ----------> -- 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