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mam externi USB disk, primontuji ho bez problemu k notebooku a dom. masine prikazem mount -t ext2 /dev/sda1 /adresar. V obou dvou pripadech jsou k dispozici dva USB porty. Bohuzel na pracovnim stroji zjistim ze: /mount: /dev/sda1 není platným blokovým zařízením

Pritom lsmod dava:

Module                  Size  Used by    Not tainted
vfat                   12092   0  (autoclean)
fat                    37432   0  (autoclean) [vfat]
sd_mod                 12928   0  (autoclean) (unused)
usb-storage            58156   0  (unused)
cmpci                  32756   1  (autoclean)
soundcore               6692   4  (autoclean) [cmpci]
radeon                 97496   1
binfmt_misc             7556   1
autofs                 12132   0  (autoclean) (unused)
3c59x                  28424   1
ide-scsi                9664   0
scsi_mod              108608   2  [sd_mod usb-storage ide-scsi]
ide-cd                 30272   0
cdrom                  32224   0  [ide-cd]
reiserfs              186464   1  (autoclean)
ehci-hcd               19520   0  (unused)
usb-uhci               24452   0  (unused)
usbcore                73216   1  [usb-storage ehci-hcd usb-uhci]
ext3                   67136   2
jbd                    49400   2  [ext3]

lsusb dava (az na konci dotazu) rozumne hlasky, takze vse by melo byt v poradku. Dotaz zni, da se zjistit, na jaky odkaz v adresari /dev se mapuji jednotlive fyzicke USB porty?

Pro uplnost jeste pridam /var/log/dmesg

VFS: Mounted root (ext2 filesystem).
Journalled Block Device driver loaded
kjournald starting.  Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
Freeing unused kernel memory: 296k freed
Adding Swap: 1052216k swap-space (priority -1)
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
usb-uhci.c: $Revision: 1.275 $ time 07:48:41 Apr 18 2002
usb-uhci.c: High bandwidth mode enabled
usb-uhci.c: USB UHCI at I/O 0xe400, IRQ 11
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
usb-uhci.c: USB UHCI at I/O 0xe000, IRQ 10
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 2
hub.c: USB hub found
hub.c: 2 ports detected
usb-uhci.c: USB UHCI at I/O 0xdc00, IRQ 11
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 3
hub.c: USB hub found
hub.c: 2 ports detected
usb-uhci.c: v1.275:USB Universal Host Controller Interface driver
ehci-hcd.c: $Revision: 1.1 $ USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci-hcd.c: block sizes: qh 96 qtd 96 itd 160 sitd 64
hcd.c: ehci-hcd @ 00:10.3, PCI device 1106:3104 (VIA Technologies, Inc.)
hcd.c: irq 5, pci mem e0902e00
usb.c: new USB bus registered, assigned bus number 4
ehci-dbg.c: ehci_start hcs_params 0x3206 dbg=0 cc=3 pcc=2 ordered !ppc ports=6
ehci-dbg.c: ehci_start extended capabilities at pci 104
ehci-dbg.c: ehci_start hcc_params 0x6872 caching 7 uframes 256/512/1024
ehci-hcd.c: reset 80002 cmd (park)=0 ithresh=8 period=1024 Reset HALT
ehci-hcd.c: init 10000 cmd (park)=0 ithresh=1 period=1024 HALT
ehci-hcd.c: USB 2.0 support enabled, EHCI rev 1. 0
hcd.c: 00:10.3 root hub device address 1
hub.c: USB hub found
hub.c: 6 ports detected
ehci-hub.c: GetStatus port 4 status 0x1803 POWER speed=2 CSC CONNECT
hub.c: Cannot enable port 4 of hub 1, disabling port.
hub.c: Maybe the USB cable is bad?
ehci-hcd.c: 00:10.3: free_config devnum 0
EXT3 FS 2.4-0.9.17, 10 Jan 2002 on ide0(3,2), internal journal
kjournald starting.  Commit interval 5 seconds
EXT3 FS 2.4-0.9.17, 10 Jan 2002 on ide0(3,3), internal journal
EXT3-fs: mounted filesystem with ordered data mode.
reiserfs: checking transaction log (device 03:04) ...
Using r5 hash to sort names
ReiserFS version 3.6.25
hdc: ATAPI 48X DVD-ROM drive, 128kB Cache
Uniform CD-ROM driver Revision: 3.12
SCSI subsystem driver Revision: 1.00
scsi0 : SCSI host adapter emulation for IDE ATAPI devices

output lsusb:
Bus 004 Device 001: ID 0000:0000 Virtual Hub
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0
  bDeviceProtocol         1
  bMaxPacketSize0         8
  idVendor           0x0000 Virtual
  idProduct          0x0000 Hub
  bcdDevice            2.40
  iManufacturer           3 Linux 2.4.18-3 ehci-hcd
  iProduct                2 PCI device 1106:3104 (VIA Technologies, Inc.)
  iSerial                 1 00:10.3
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x40
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize          2
        bInterval              12
  Language IDs: (length=4)
     0000 (null)((null))

Bus 003 Device 001: ID 0000:0000 Virtual Hub
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x0000 Virtual
  idProduct          0x0000 Hub
  bcdDevice            0.00
  iManufacturer           0
  iProduct                2 USB UHCI Root Hub
  iSerial                 1 dc00
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x40
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize          8
        bInterval             255
  Language IDs: (length=4)
     0000 (null)((null))

Bus 002 Device 001: ID 0000:0000 Virtual Hub
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x0000 Virtual
  idProduct          0x0000 Hub
  bcdDevice            0.00
  iManufacturer           0
  iProduct                2 USB UHCI Root Hub
  iSerial                 1 e000
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x40
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize          8
        bInterval             255
  Language IDs: (length=4)
     0000 (null)((null))

Bus 001 Device 001: ID 0000:0000 Virtual Hub
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x0000 Virtual
  idProduct          0x0000 Hub
  bcdDevice            0.00
  iManufacturer           0
  iProduct                2 USB UHCI Root Hub
  iSerial                 1 e400
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x40
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize          8
        bInterval             255
  Language IDs: (length=4)
     0000 (null)((null))