USB Kartenleser/Hub: usb-storage Devicescan Problem

[Skipper]

Moin,
ich habe mir einen 8 in 1 Kartenleser (vier Slots) mit zwei zusätzlichen USB-Anschlüssen und 5,25"-Frontblende eingebaut. Das Teil wird über einen der normalen hinteren USB-Ports angeschlossen.

Das Teil und eingesteckte Medien werden auch erkannt, im Logauszug z.B. eine 16 MB SD-Card unter /dev/sde und ein 512 MB USB-Stick unter /dev/sda. Das Problem ist, daß das Modul usb-storage zuerst im Sekundentakt mit hoher Systemlast, nach einiger Zeit dann im Minutentakt alles wieder disconnected und neu scannt. Bei jedem Scan werden auch die Devices unter /dev wieder gelöscht und neu erstellt.

Das gleiche Verhalten habe ich unter Gentoo mit Kernel 2.6.11 und SuSE 9.2. Wie lässt sich das abstellen? Muss so ein Scan überhaupt regelmäßig laufen? Sollten neu eingesteckte Medien nicht ganz normal über den Hotplug-Mechanismus erkannt werden?

Hier ein vollständiger Scan:

May 22 09:16:29 hal9000 kernel: usb 4-1: USB disconnect, address 92
May 22 09:16:29 hal9000 kernel: usb 4-1.1: USB disconnect, address 93
May 22 09:16:29 hal9000 kernel: usb 4-1.2: USB disconnect, address 94
May 22 09:16:29 hal9000 kernel: usb 4-1.4: USB disconnect, address 95
May 22 09:16:30 hal9000 kernel: usb 4-1: new high speed USB device using ehci_hcd and address 96
May 22 09:16:30 hal9000 kernel: hub 4-1:1.0: USB hub found
May 22 09:16:30 hal9000 kernel: hub 4-1:1.0: 4 ports detected
May 22 09:16:30 hal9000 kernel: usb 4-1.1: new high speed USB device using ehci_hcd and address 97
May 22 09:16:30 hal9000 kernel: scsi296 : SCSI emulation for USB Mass Storage devices
May 22 09:16:30 hal9000 kernel: usb-storage: device found at 97
May 22 09:16:30 hal9000 kernel: usb-storage: waiting for device to settle before scanning
May 22 09:16:30 hal9000 kernel: usb 4-1.2: new full speed USB device using ehci_hcd and address 98
May 22 09:16:31 hal9000 kernel: usb 4-1.4: new high speed USB device using ehci_hcd and address 99
May 22 09:16:31 hal9000 kernel: scsi297 : SCSI emulation for USB Mass Storage devices
May 22 09:16:31 hal9000 kernel: usb-storage: device found at 99
May 22 09:16:31 hal9000 kernel: usb-storage: waiting for device to settle before scanning
May 22 09:16:31 hal9000 kernel: usb 4-1: USB disconnect, address 96
May 22 09:16:31 hal9000 kernel: usb 4-1.1: USB disconnect, address 97
May 22 09:16:31 hal9000 kernel: usb 4-1.2: USB disconnect, address 98
May 22 09:16:31 hal9000 kernel: usb 4-1.4: USB disconnect, address 99
May 22 09:16:32 hal9000 kernel: usb 4-1: new high speed USB device using ehci_hcd and address 100
May 22 09:16:32 hal9000 kernel: hub 4-1:1.0: USB hub found
May 22 09:16:32 hal9000 kernel: hub 4-1:1.0: 4 ports detected
May 22 09:16:32 hal9000 kernel: usb 4-1.1: new high speed USB device using ehci_hcd and address 101
May 22 09:16:32 hal9000 kernel: scsi298 : SCSI emulation for USB Mass Storage devices
May 22 09:16:32 hal9000 kernel: usb-storage: device found at 101
May 22 09:16:32 hal9000 kernel: usb-storage: waiting for device to settle before scanning
May 22 09:16:32 hal9000 kernel: usb 4-1.2: new full speed USB device using ehci_hcd and address 102
May 22 09:16:33 hal9000 kernel: usb 4-1.4: new high speed USB device using ehci_hcd and address 103
May 22 09:16:33 hal9000 kernel: scsi299 : SCSI emulation for USB Mass Storage devices
May 22 09:16:33 hal9000 kernel: usb-storage: device found at 103
May 22 09:16:33 hal9000 kernel: usb-storage: waiting for device to settle before scanning
May 22 09:16:37 hal9000 kernel:   Vendor: Samsung   Model: Mighty Drive      Rev: PMAP
May 22 09:16:37 hal9000 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 00
May 22 09:16:37 hal9000 kernel: SCSI device sda: 1006592 512-byte hdwr sectors (515 MB)
May 22 09:16:37 hal9000 kernel: sda: Write Protect is off
May 22 09:16:37 hal9000 kernel: sda: Mode Sense: 23 00 00 00
May 22 09:16:37 hal9000 kernel: sda: assuming drive cache: write through
May 22 09:16:37 hal9000 kernel: SCSI device sda: 1006592 512-byte hdwr sectors (515 MB)
May 22 09:16:37 hal9000 kernel: sda: Write Protect is off
May 22 09:16:37 hal9000 kernel: sda: Mode Sense: 23 00 00 00
May 22 09:16:37 hal9000 kernel: sda: assuming drive cache: write through
May 22 09:16:37 hal9000 kernel:  /dev/scsi/host298/bus0/target0/lun0: p1
May 22 09:16:37 hal9000 kernel: Attached scsi removable disk sda at scsi298, channel 0, id 0, lun 0
May 22 09:16:37 hal9000 kernel: Attached scsi generic sg0 at scsi298, channel 0, id 0, lun 0,  type 0
May 22 09:16:37 hal9000 kernel: usb-storage: device scan complete
May 22 09:16:38 hal9000 kernel:   Vendor: SMSC      Model: 223 U HS-CF       Rev: 1.95
May 22 09:16:38 hal9000 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 00
May 22 09:16:38 hal9000 kernel: Attached scsi removable disk sdb at scsi299, channel 0, id 0, lun 0
May 22 09:16:38 hal9000 kernel: Attached scsi generic sg1 at scsi299, channel 0, id 0, lun 0,  type 0
May 22 09:16:38 hal9000 scsi.agent[5954]: disk at /devices/pci0000:00/0000:00:10.3/usb4/4-1/4-1.1/4-1.1:1.0/host298/target298:0:0/298:0:0:0
May 22 09:16:38 hal9000 kernel:   Vendor: SMSC      Model: 223 U HS-MS       Rev: 1.95
May 22 09:16:38 hal9000 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 00
May 22 09:16:38 hal9000 kernel: Attached scsi removable disk sdc at scsi299, channel 0, id 0, lun 1
May 22 09:16:38 hal9000 kernel: Attached scsi generic sg2 at scsi299, channel 0, id 0, lun 1,  type 0
May 22 09:16:38 hal9000 kernel:   Vendor: SMSC      Model: 223 U HS-SM       Rev: 1.95
May 22 09:16:38 hal9000 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 00
May 22 09:16:38 hal9000 kernel: Attached scsi removable disk sdd at scsi299, channel 0, id 0, lun 2
May 22 09:16:38 hal9000 kernel: Attached scsi generic sg3 at scsi299, channel 0, id 0, lun 2,  type 0
May 22 09:16:38 hal9000 kernel:   Vendor: SMSC      Model: 223 U HS-SD/MMC   Rev: 1.95
May 22 09:16:38 hal9000 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 00
May 22 09:16:38 hal9000 kernel: SCSI device sde: 29120 512-byte hdwr sectors (15 MB)
May 22 09:16:38 hal9000 kernel: sde: Write Protect is off
May 22 09:16:38 hal9000 kernel: sde: Mode Sense: 03 00 00 00
May 22 09:16:38 hal9000 kernel: sde: assuming drive cache: write through
May 22 09:16:38 hal9000 kernel: SCSI device sde: 29120 512-byte hdwr sectors (15 MB)
May 22 09:16:38 hal9000 kernel: sde: Write Protect is off
May 22 09:16:38 hal9000 kernel: sde: Mode Sense: 03 00 00 00
May 22 09:16:38 hal9000 kernel: sde: assuming drive cache: write through
May 22 09:16:38 hal9000 kernel:  /dev/scsi/host299/bus0/target0/lun3: p1
May 22 09:16:38 hal9000 kernel: Attached scsi removable disk sde at scsi299, channel 0, id 0, lun 3
May 22 09:16:38 hal9000 kernel: Attached scsi generic sg4 at scsi299, channel 0, id 0, lun 3,  type 0
May 22 09:16:38 hal9000 kernel: usb-storage: device scan complete

Und hier gehts gleich wieder von vorne los:

May 22 09:16:39 hal9000 scsi.agent[5982]: disk at /devices/pci0000:00/0000:00:10.3/usb4/4-1/4-1.4/4-1.4:1.0/host299/target299:0:0/299:0:0:0
May 22 09:16:39 hal9000 scsi.agent[6005]: disk at /devices/pci0000:00/0000:00:10.3/usb4/4-1/4-1.4/4-1.4:1.0/host299/target299:0:0/299:0:0:1
May 22 09:16:39 hal9000 scsi.agent[6032]: disk at /devices/pci0000:00/0000:00:10.3/usb4/4-1/4-1.4/4-1.4:1.0/host299/target299:0:0/299:0:0:2
May 22 09:16:39 hal9000 scsi.agent[6055]: disk at /devices/pci0000:00/0000:00:10.3/usb4/4-1/4-1.4/4-1.4:1.0/host299/target299:0:0/299:0:0:3
May 22 09:16:44 hal9000 kernel: usb 4-1: USB disconnect, address 100
May 22 09:16:44 hal9000 kernel: usb 4-1.1: USB disconnect, address 101
May 22 09:16:44 hal9000 kernel: usb 4-1.2: USB disconnect, address 102
May 22 09:16:44 hal9000 kernel: usb 4-1.4: USB disconnect, address 103
May 22 09:16:44 hal9000 kernel: usb 4-1: new high speed USB device using ehci_hcd and address 104
May 22 09:16:44 hal9000 kernel: hub 4-1:1.0: USB hub found
May 22 09:16:44 hal9000 kernel: hub 4-1:1.0: 4 ports detected
May 22 09:16:45 hal9000 kernel: usb 4-1.1: new high speed USB device using ehci_hcd and address 105
May 22 09:16:45 hal9000 kernel: scsi300 : SCSI emulation for USB Mass Storage devices
May 22 09:16:45 hal9000 kernel: usb-storage: device found at 105
May 22 09:16:45 hal9000 kernel: usb-storage: waiting for device to settle before scanning
May 22 09:16:45 hal9000 kernel: usb 4-1.2: new full speed USB device using ehci_hcd and address 106
May 22 09:16:45 hal9000 kernel: usb 4-1.4: new high speed USB device using ehci_hcd and address 107
May 22 09:16:46 hal9000 kernel: scsi301 : SCSI emulation for USB Mass Storage devices
May 22 09:16:46 hal9000 kernel: usb-storage: device found at 107
May 22 09:16:46 hal9000 kernel: usb-storage: waiting for device to settle before scanning
May 22 09:16:48 hal9000 kernel: usb 4-1: USB disconnect, address 104
May 22 09:16:48 hal9000 kernel: usb 4-1.1: USB disconnect, address 105
May 22 09:16:48 hal9000 kernel: usb 4-1.2: USB disconnect, address 106
May 22 09:16:48 hal9000 kernel: usb 4-1.4: USB disconnect, address 107
May 22 09:16:48 hal9000 kernel: usb 4-1: new high speed USB device using ehci_hcd and address 108
May 22 09:16:48 hal9000 kernel: hub 4-1:1.0: USB hub found
May 22 09:16:48 hal9000 kernel: hub 4-1:1.0: 4 ports detected
May 22 09:16:48 hal9000 kernel: usb 4-1.1: new high speed USB device using ehci_hcd and address 109
May 22 09:16:48 hal9000 kernel: scsi302 : SCSI emulation for USB Mass Storage devices
May 22 09:16:48 hal9000 kernel: usb-storage: device found at 109
May 22 09:16:48 hal9000 kernel: usb-storage: waiting for device to settle before scanning
May 22 09:16:49 hal9000 kernel: usb 4-1.2: new full speed USB device using ehci_hcd and address 110
May 22 09:16:49 hal9000 kernel: usb 4-1.4: new high speed USB device using ehci_hcd and address 111
May 22 09:16:49 hal9000 kernel: scsi303 : SCSI emulation for USB Mass Storage devices
May 22 09:16:49 hal9000 kernel: usb-storage: device found at 111
May 22 09:16:49 hal9000 kernel: usb-storage: waiting for device to settle before scanning
May 22 09:16:50 hal9000 kernel: usb 4-1: USB disconnect, address 108
May 22 09:16:50 hal9000 kernel: usb 4-1.1: USB disconnect, address 109
May 22 09:16:50 hal9000 kernel: usb 4-1.2: USB disconnect, address 110
May 22 09:16:50 hal9000 kernel: usb 4-1.4: USB disconnect, address 111
May 22 09:16:50 hal9000 kernel: usb 4-1: new high speed USB device using ehci_hcd and address 112
May 22 09:16:50 hal9000 kernel: hub 4-1:1.0: USB hub found
May 22 09:16:50 hal9000 kernel: hub 4-1:1.0: 4 ports detected
May 22 09:16:50 hal9000 kernel: usb 4-1.1: new high speed USB device using ehci_hcd and address 113
May 22 09:16:50 hal9000 kernel: scsi304 : SCSI emulation for USB Mass Storage devices
May 22 09:16:50 hal9000 kernel: usb-storage: device found at 113
May 22 09:16:50 hal9000 kernel: usb-storage: waiting for device to settle before scanning
May 22 09:16:51 hal9000 kernel: usb 4-1.2: new full speed USB device using ehci_hcd and address 114
May 22 09:16:51 hal9000 kernel: usb 4-1.4: new high speed USB device using ehci_hcd and address 115
May 22 09:16:51 hal9000 kernel: scsi305 : SCSI emulation for USB Mass Storage devices
May 22 09:16:51 hal9000 kernel: usb-storage: device found at 115
May 22 09:16:51 hal9000 kernel: usb-storage: waiting for device to settle before scanning
May 22 09:16:56 hal9000 kernel:   Vendor: Samsung   Model: Mighty Drive      Rev: PMAP
May 22 09:16:56 hal9000 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 00
May 22 09:16:56 hal9000 kernel: SCSI device sda: 1006592 512-byte hdwr sectors (515 MB)
May 22 09:16:56 hal9000 kernel: sda: Write Protect is off
May 22 09:16:56 hal9000 kernel: sda: Mode Sense: 23 00 00 00
May 22 09:16:56 hal9000 kernel: sda: assuming drive cache: write through
May 22 09:16:56 hal9000 kernel: SCSI device sda: 1006592 512-byte hdwr sectors (515 MB)
May 22 09:16:56 hal9000 kernel: sda: Write Protect is off
May 22 09:16:56 hal9000 kernel: sda: Mode Sense: 23 00 00 00
May 22 09:16:56 hal9000 kernel: sda: assuming drive cache: write through
May 22 09:16:56 hal9000 kernel:  /dev/scsi/host304/bus0/target0/lun0: p1
May 22 09:16:56 hal9000 kernel: Attached scsi removable disk sda at scsi304, channel 0, id 0, lun 0
May 22 09:16:56 hal9000 kernel: Attached scsi generic sg0 at scsi304, channel 0, id 0, lun 0,  type 0
May 22 09:16:56 hal9000 kernel: usb-storage: device scan complete
May 22 09:16:56 hal9000 kernel:   Vendor: SMSC      Model: 223 U HS-CF       Rev: 1.95
May 22 09:16:56 hal9000 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 00
May 22 09:16:56 hal9000 kernel: Attached scsi removable disk sdb at scsi305, channel 0, id 0, lun 0
May 22 09:16:56 hal9000 kernel: Attached scsi generic sg1 at scsi305, channel 0, id 0, lun 0,  type 0
May 22 09:16:56 hal9000 kernel:   Vendor: SMSC      Model: 223 U HS-MS       Rev: 1.95
May 22 09:16:56 hal9000 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 00
May 22 09:16:57 hal9000 scsi.agent[7142]: disk at /devices/pci0000:00/0000:00:10.3/usb4/4-1/4-1.1/4-1.1:1.0/host304/target304:0:0/304:0:0:0
May 22 09:16:57 hal9000 kernel: Attached scsi removable disk sdc at scsi305, channel 0, id 0, lun 1
May 22 09:16:57 hal9000 kernel: Attached scsi generic sg2 at scsi305, channel 0, id 0, lun 1,  type 0
May 22 09:16:57 hal9000 kernel:   Vendor: SMSC      Model: 223 U HS-SM       Rev: 1.95
May 22 09:16:57 hal9000 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 00
May 22 09:16:57 hal9000 kernel: Attached scsi removable disk sdd at scsi305, channel 0, id 0, lun 2
May 22 09:16:57 hal9000 kernel: Attached scsi generic sg3 at scsi305, channel 0, id 0, lun 2,  type 0
May 22 09:16:57 hal9000 kernel:   Vendor: SMSC      Model: 223 U HS-SD/MMC   Rev: 1.95
May 22 09:16:57 hal9000 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 00
May 22 09:16:57 hal9000 kernel: SCSI device sde: 29120 512-byte hdwr sectors (15 MB)
May 22 09:16:57 hal9000 kernel: sde: Write Protect is off
May 22 09:16:57 hal9000 kernel: sde: Mode Sense: 03 00 00 00
May 22 09:16:57 hal9000 kernel: sde: assuming drive cache: write through
May 22 09:16:57 hal9000 kernel: SCSI device sde: 29120 512-byte hdwr sectors (15 MB)
May 22 09:16:57 hal9000 kernel: sde: Write Protect is off
May 22 09:16:57 hal9000 kernel: sde: Mode Sense: 03 00 00 00
May 22 09:16:57 hal9000 kernel: sde: assuming drive cache: write through
May 22 09:16:57 hal9000 kernel:  /dev/scsi/host305/bus0/target0/lun3: p1
May 22 09:16:57 hal9000 kernel: Attached scsi removable disk sde at scsi305, channel 0, id 0, lun 3
May 22 09:16:57 hal9000 kernel: Attached scsi generic sg4 at scsi305, channel 0, id 0, lun 3,  type 0
May 22 09:16:57 hal9000 kernel: usb-storage: device scan complete
May 22 09:16:57 hal9000 scsi.agent[7170]: disk at /devices/pci0000:00/0000:00:10.3/usb4/4-1/4-1.4/4-1.4:1.0/host305/target305:0:0/305:0:0:0
May 22 09:16:58 hal9000 scsi.agent[7192]: disk at /devices/pci0000:00/0000:00:10.3/usb4/4-1/4-1.4/4-1.4:1.0/host305/target305:0:0/305:0:0:1
May 22 09:16:58 hal9000 scsi.agent[7220]: disk at /devices/pci0000:00/0000:00:10.3/usb4/4-1/4-1.4/4-1.4:1.0/host305/target305:0:0/305:0:0:2
May 22 09:16:58 hal9000 scsi.agent[7243]: disk at /devices/pci0000:00/0000:00:10.3/usb4/4-1/4-1.4/4-1.4:1.0/host305/target305:0:0/305:0:0:3

[Skipper]

Hmm,
komisch. Ich hatte alles noch einmal auseinander und wieder zusammengebaut, und jetzt funktioniert es. War vielleicht nur ein Wackelkontakt in der Verkabelung.