I've got SanDisk Sansa c240 MP3 player here. It usually causes repeated
USB resets and disconnects, but _sometimes_ it settles down and is
eventually found. But settling down is rare - most of the time it just
keeps resetting.
Anyway once discovered, it is mountable and I managed to write 700 MB of
data with no problem (well, average write speed was 4 MB/s, too low for
my taste).
Does this behavior ring a bell?
Uname, dmesg and lsusb outputs follow. I'd be more than glad to provide
more debugging info on demand.
Vit
$ uname -a
Linux dido 2.6.18.1-v2 #1 SMP PREEMPT Sat Oct 28 17:45:57 CEST 2006
x86_64 GNU/Linux
$ dmesg
...
usb 1-5: new high speed USB device using ehci_hcd and address 6
usb 1-5: configuration #128 chosen from 1 choice
scsi3 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 6
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 6
scsi 3:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 7
usb 1-5: configuration #128 chosen from 1 choice
scsi4 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 7
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 7
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 7
scsi 4:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 8
usb 1-5: configuration #128 chosen from 1 choice
scsi5 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 8
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 8
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 8
scsi 5:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 9
usb 1-5: configuration #128 chosen from 1 choice
scsi6 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 9
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 9
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 9
scsi 6:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 10
usb 1-5: configuration #128 chosen from 1 choice
scsi7 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 10
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 10
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 10
scsi 7:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 11
usb 1-5: configuration #128 chosen from 1 choice
scsi8 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 11
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 11
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 11
scsi 8:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 12
usb 1-5: configuration #128 chosen from 1 choice
scsi9 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 12
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 12
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 12
scsi 9:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 13
usb 1-5: configuration #128 chosen from 1 choice
scsi10 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 13
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 13
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 13
scsi 10:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 14
usb 1-5: configuration #128 chosen from 1 choice
scsi11 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 14
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 14
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 14
scsi 11:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 15
usb 1-5: configuration #128 chosen from 1 choice
scsi12 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 15
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 15
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 15
scsi 12:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 16
usb 1-5: configuration #128 chosen from 1 choice
scsi13 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 16
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 16
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 16
scsi 13:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 17
usb 1-5: configuration #128 chosen from 1 choice
scsi14 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 17
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 17
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 17
scsi 14:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 18
usb 1-5: configuration #128 chosen from 1 choice
scsi15 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 18
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 18
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 18
scsi 15:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 19
usb 1-5: configuration #128 chosen from 1 choice
scsi16 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 19
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 19
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 19
scsi 16:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 20
usb 1-5: configuration #128 chosen from 1 choice
scsi17 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 20
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 20
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 20
scsi 17:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 21
usb 1-5: configuration #128 chosen from 1 choice
scsi18 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 21
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 21
usb 1-5: failed to restore interface 0 altsetting 0 (error=-110)
usb 1-5: USB disconnect, address 21
scsi 18:0:0:0: scsi: Device offlined - not ready after error recovery
usb-storage: device scan complete
usb 1-5: new high speed USB device using ehci_hcd and address 22
usb 1-5: configuration #128 chosen from 1 choice
scsi19 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 22
usb-storage: waiting for device to settle before scanning
usb 1-5: reset high speed USB device using ehci_hcd and address 22
Vendor: SanDisk Model: Sansa c240 Rev: Sans
Type: Direct-Access ANSI SCSI revision: 00
SCSI device sdd: 2006528 512-byte hdwr sectors (1027 MB)
sdd: Write Protect is off
sdd: Mode Sense: 3f 00 00 08
sdd: assuming drive cache: write through
SCSI device sdd: 2006528 512-byte hdwr sectors (1027 MB)
sdd: Write Protect is off
sdd: Mode Sense: 3f 00 00 08
sdd: assuming drive cache: write through
sdd: sdd1 sdd2
sd 19:0:0:0: Attached scsi removable disk sdd
Vendor: SanDisk Model: Sansa c240 Rev: Sans
Type: Direct-Access ANSI SCSI revision: 00
sd 19:0:0:1: Attached scsi removable disk sde
usb-storage: device scan complete
# lsusb -v
...
Bus 002 Device 009: ID 0781:7450 SanDisk Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0781 SanDisk Corp.
idProduct 0x7450
bcdDevice 7.20
iManufacturer 1 SanDisk
iProduct 2 Sansa c240
iSerial 3 4453033f-31305453-57018047-6c00d0e4-00000000
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 39
bNumInterfaces 1
bConfigurationValue 128
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk (Zip)
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 100
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 255 Vendor Specific Subclass
bDeviceProtocol 255 Vendor Specific Protocol
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
...
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