[SOLVED]USB flash drive no longer showing up in /dev

My USB flash drives are no longer showing up in /dev. I also don't see them in /dev/disks/... either. Dmesg outputs:
[731969.826862] usb 1-1: new high-speed USB device number 5 using ehci_hcd
Any ideas on where to start?
Last edited by nadman10 (2012-09-26 22:12:22)

ls -l outputs:
Bus 001 Device 005: ID 0781:5530 SanDisk Corp. Cruzer
Couldn't open device, some information will be missing
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 0x5530 Cruzer
bcdDevice 1.00
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 200mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 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 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 1
Bus 002 Device 002: ID 045e:0040 Microsoft Corp. Wheel Mouse Optical
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x045e Microsoft Corp.
idProduct 0x0040 Wheel Mouse Optical
bcdDevice 3.00
iManufacturer 1
iProduct 3
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 34
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 2 Mouse
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 72
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0004 1x 4 bytes
bInterval 10
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 0 Full speed (or root) hub
bMaxPacketSize0 64
idVendor 0x1d6b Linux Foundation
idProduct 0x0002 2.0 root hub
bcdDevice 3.05
iManufacturer 3
iProduct 2
iSerial 1
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0004 1x 4 bytes
bInterval 12
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 0 Full speed (or root) hub
bMaxPacketSize0 64
idVendor 0x1d6b Linux Foundation
idProduct 0x0001 1.1 root hub
bcdDevice 3.05
iManufacturer 3
iProduct 2
iSerial 1
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 255

Similar Messages

USB Flash Drive no longer shows on Desktop, it does appear in disk utility. I recently upgraded to 10.8 from 10.6 on both iMac and Macbook and the drive does the same on both.

I updated my Snow Leopard to Mountain Lion and have had only minor issues with some software but I plugged in a USB flash drive and went to format it, it now appears only in disk utility and not on the desktop. I have tried restarting and reseting with the drive in and out, I tried it into my macbook and it does exactly the same there. I can't do anything in Disk Utility so can't access it in any way and it says errors if I try to eject it from DU. I'm not normally stumped but I can't figure this out at all. I'm hoping that someone here could give me an idea that I haven't thought of as it's a large Flash Drive and I really would like to keep using it.
Thanks in advance for any help anyone can offer.

If it has the same (bad) behavior on two different systems then there is a very good chance that the drive is toast.
BTW you'll get better response to your questions if the question actually reflects the problem you are having. In this case it would have been better to say you couldn't access the drive rather then that it doesn't show on the desktop.
regards

[Solved]USB Flash Drive inaccessible.

Hi there.
I have installed Arch Linux on my Sony laptop and I have configured it so that most stuff works. The only problem I'm facing now, is that my USB Flash Drive won't show up when I plug it in. I have tried restarting ehci service, but it does not solve anything. I had this problem many years ago with another computer running Linux, but I can't remember how it got solved. Connecting a USB-mouse works perfectly but not a flash drive. The drive is a FAT32 formatted Kingston.
This is my dmesg log:
[ 109.300651] usb 2-1.3: new high-speed USB device number 4 using ehci_hcd
[ 109.613294] Initializing USB Mass Storage driver...
[ 109.613459] scsi7 : usb-storage 2-1.3:1.0
[ 109.613577] usbcore: registered new interface driver usb-storage
[ 109.613579] USB Mass Storage support registered.
[ 110.614456] scsi 7:0:0:0: Direct-Access Generic Flash Disk 8.07 PQ: 0 ANSI: 2
[ 110.616674] sd 7:0:0:0: [sdc] 8237056 512-byte logical blocks: (4.21 GB/3.92 GiB)
[ 110.617821] sd 7:0:0:0: [sdc] Write Protect is off
[ 110.617835] sd 7:0:0:0: [sdc] Mode Sense: 03 00 00 00
[ 110.618550] sd 7:0:0:0: [sdc] No Caching mode page present
[ 110.618561] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 110.621899] sd 7:0:0:0: [sdc] No Caching mode page present
[ 110.621908] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 110.787723] sdc: sdc1
[ 110.880634] sd 7:0:0:0: [sdc] No Caching mode page present
[ 110.880647] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 110.880655] sd 7:0:0:0: [sdc] Attached SCSI removable disk
Running openbox with PCManFM. Any clues how to solve this?
Last edited by light (2013-03-17 21:26:26)

s1ln7m4s7r wrote:
For what i can see from the log there is no problem.
Have you tried to manually mount it? To see if it is a PCManFM issue. Also, have you checked this:
https://wiki.archlinux.org/index.php/PC … ge_devices
Hi.
I tried installing gvfs, apparently I uninstalled it for some reason before. But it did not help mounting the flash drive. So I tried mounting it manually and it worked (Yaay!). But it complained that my flash drive was not mentioned in fstab. So I looked in fstab and the only ones listed is my root partion "/" and "/home". So how do I add USB mounting to fstab? I'm a little bit confused.
And one off-topic question: Shouldn't my "/var" partion also be mentioned in fstab?
Thanks for helping me
Edit: This is how fstab looks right now
# /etc/fstab: static file system information
# <file system> <dir> <type> <options> <dump> <pass>
# /dev/sda2 LABEL=/
UUID=ed07bdb6-61c6-4cc7-b98d-122a869046f1 / ext4 rw,relatime,data=ordered 0 1
# /dev/sda4 LABEL=/home
UUID=7448100b-682b-430f-9e59-327ce6f9f22c /home ext4 rw,relatime,data=ordered 0 2
Last edited by light (2013-03-17 20:54:38)

Installed itunes - usb flash drive no longer recognized

hi,
I installed itunes, loaded up the ipod with music, and now my computer will no longer read the files off my usb flash drive. the computer sees the "mass storage device" when I plug my drive in, but the volume/files are not coming up.
any suggestions?
thank you!

Are you sure the files are still on your Flash drive.? Can you locate them in a folder on you flash drive just by going to the iTunes\iTunes Music folder and viewing the array of folders? If they are there, go back to the iTunes icon on the desktop, bring up the list of tunes, highlight them all, delete them, and go back to the Flash drive, highlight all the folders, drag them over to your blank iTunes screen and drop them. You won't get any indication anything is happening right away but they are reloading. For some reason iTunes cannot update itself with the correct pathways.
Hope this helps, Dave.

I recently upgraded to Maverick 10.9.2 USB Hard Drive no longer shows

I just upgraded to Maverick 10.9.2 and my external hardrive (Toshiba Canvio Basic 3.0 Portable Hard Drive, PN#HDTB210XK3BA) is no longer appearing on my desk top when I plug it in. It shows in the Disk Utliity and I have tried doing a verify as well as a repair and I stilll get the same message...
"Updating boot support partitions for the volume as required."
I did a backup just prior to updating to Maverick so I know the external drive still works. Plus I am able to see the files on my PC when I plug it in to there.
I did try resetting the SMC and the NVRAM/PRAM.
I plugged other externa; drives in (Maxtor, Seagate, etc) and again they did not show on the desk top but did show in Disk Utlity.
I see this has happened to several folks but am wondering how they got it fixed.

You need the printer drivers for Mavericks.. have you loaded them?
You can expect issues as lots of printers are not yet up to date with Mavericks.. if you can find drivers. delete all the previous printers and start over using the new drivers.

"Removable Disk" shows up in Windows 7 even when USB Flash drive isn't there

I have a new windoz 7 computer, a couple of new sandisk cruzer 16bg flash drives. I removed the flash drives a couple of times without doing the "eject" thing. I never had a problem with your flashdrives on my xp machines. I know I was a bad boy, I just pulled the usb flash drive out. When I go to my computer folder it shows me my hard drives and its shows 5 Devices with Removable Storage ....one of which is the DVD RW Drive and 4 Removable Disk which are or were times when I plugged in my usb flash drive. They show 0 bytes, nothing is in any of the "Removable Disk" instances and I cannot remove them. I tried to delete, cut and I tried to eject but the Removable Disk icon stays there. How can I get rid of these safely, I tried rebooting a couple of times, they show up even without any usb devices plugged in. Thanks in advance Scott

I had this same problem. It turns out to be easy to resolve:Open the Windows 7 "Start" Menu, on the right shoose computer, in the new window that opens choose System Properties from the choices across the top of the window, now on the left side of the window choose Device Manager. In Device Manager expand the "Disk Drives" entry. You should see a listing of your hard disk drives and you'll also see "removable disk drives" with some additional idnetifying information. Select the offending entry and then right click and select "Uninstall" click "Okay" and the entry will be gone. Just be sure you're not uninstalling one of your hard disks. That's all there is to it. To prevent this issue in the future always "eject" the SD drives/sticks before you remove them. I hope this helps.

Follow up question on recovery data on USB flash drive

HP instructions say the 32 GB flash drive should NOT be branded as Windows 8 compatible. I bought a Sandisk 32 GB yesterday for $20 on sale, but it says on the back it is compatible.
Other more/or less expensive flash drives did not address whether compatible with Windows 8.
I have Windows 8.1
Thanks in advance for your help...
This question was solved.
View Solution.

Hi,
If the flash drive is listed as 'Windows 8 compatible' it cannot be used - the reason is because the HP Recovery Media creation software looks for an external device and flash drives marked Win 8 compatible show as internal drives.
In the example below, the 32 Gb usb flash drive 'Dave G' shows as an internal drive which cannot be used, while the usb flash drive 'Removable Disk H' would work.
Regards,
DP-K
****Click the White thumb to say thanks****
****Please mark Accept As Solution if it solves your problem****
****I don't work for HP****
Microsoft MVP - Windows Experience

10.5.1: Unable to mount a USB flash drive.

I've seen this problem posted elsewhere, but so far I have yet to see a solution:
After upgrading my MacBook Pro to 10.5.1, it can no longer mount USB flash drives. They show up in System Profiler as well as the USB Probe tool, but do not show up in Disk Utility (and, obviously, not on the Desktop or listed in /Volumes).
I checked the drives on a co-worker's MBP, also running 10.5, and the problem persisted there. The drives mount and work fine under 10.4, as well as various flavors of Windows. When plugged into the MBPs, the status LEDs light up, so they are getting power, and mice plugged into the USB ports work fine.
So, the problem seems to be specific to mounting a USB flash drive in 10.5/10.5.1. I'm not sure if this is specific to MacBook Pros, or if the issue is the same on all 10.5 machines.
Any help would be appreciated.

I have the USB problem. When I insert my USB memory pen, it flashes then stops. The icon doesn't come up on the Desktop, but the memory shows up on the System Profiler.
My USB telephone responds in Skype, but the sound input and output don't show up in Preferences, and so the phone doesn't work.
My Vodaphone USB internet modem won't connect.
This morning, I have no sound at all.
All these problems are resolved if the computer is restarted with the external source already plugged in, but it's a big hassle and must be solvable............

Usb flash drive wont mount on desktop

my usb flash drive no longer mounts on the desktop or shows up in disk utility.When i plugged it in the green led did a series of flashes with 3 intervals and the cursor froze.Unplugging it brings the computer back to normal.It works fine on a powerbook and on a pc at work.I re-formated the drive on the pc using fat32 and it works fine.(dragged files out first and back again after re-format).Now when i bring it home the green light flashes continuous and does not affect the computer in any way but it still wont show on desktop or in disk utility?.
imac 333 Mac OS X (10.3.9) 512m ram 40gig 7200 harddrive

I have a few devices connected all right but they work fine on either usb input. I think maybe the system software may be damaged somehow but i am only guessing and i dont want to re-install in case i am wrong.
imac 333 Mac OS X (10.3.9) 512m ram 40gig 7200 harddrive

Can I copy HP Recovery Media to another USB flash drive?

Hi. Just a couple questions please: 1. When I make the one time only "HP Recovery Media" to a USB pen drive, can I then "copy" and "paste" to another USB flash drive as long as the 2nd flash drive has enough capacity?The Recovery will still work right?I ask this in case I need to change to another USB flash drive and I am aware that I can only have one copy of the HP Recovery. 2. If that is the case, I then can also make a backup to an external Western Digital drive so that in case of malfunction of the USB flash drive I can always transfer the files to another USB flash drive? Thanks in advance for the reply. Best regards.

Hi, Copy and paste won't work. Please try the following method: http://h30434.www3.hp.com/t5/Notebook-Operating-Systems-and-Software/This-is-how-to-make-a-2nd-set-of-recovery-disks/td-p/1694703 Regards.

After I installed Lion, my MacBook Pro can no longer detect my external hard drives or my USB flash drives. What should I do?

After I installed Lion, my MacBook Pro can no longer detect my external hard drives or my USB flash drives. What should I do?

And me -- My Mac at work running Snow Leopard reads the drive normally. My home Mac (on Lion) can't even find it....
Yet another Leo let-down.....

Hi, I loaded Windows 7 Pro w/XP mode and iMac USB show working properly in device manager, but i cannot see a USB flash drive, or my Mac Superdrive. Does anyone have a suggestion? Thanks!

Hi, I loaded Windows 7 Pro w/XP mode and iMac USB show working properly in device manager, but i cannot see a USB flash drive, or my Mac Superdrive. Does anyone have a suggestion? Thanks!

MacDrive to provide better HFS support.
And to acces and write.

Combine USB flash drives and other USB storage to show up as one?

Hi,
Is it possible to combine USB flash drives or USB hard drives so when you plug two or more in, it will show up as one? Kind of the opposite of partitioning. Preferably using disk utility.
Thanks!

Hi gpd2paul4;
Possible probably. Should you do it? Probably not.
You would be using software RAID which would run only as fast as the slowest item in the RAID array. The USB flash drive would make the RAID array abysmally slow at best.
Allan

Usb flash drive read only problem [solved]

Hi, im using spacefm, i have udevil and udisks2 installed, i can read my USB flash drive but i cannot delete files, i tried gparted that use spacefm as well and i can delete files from the usb flash drive with no problems, any ideas?
i solved i installed ntfs-3g and i can delete files again
thanks
Last edited by adcdam (2013-04-08 01:01:22)

I installed it and got this error : now my Macbook wont even see the flash drive...

[solved] Suddenly no permissions on specific USB flash drive

Hi,
since yesterday I can't delete or create new files on my primary USB flash drive.
I then tried my other USB drive and it works without a problem.
Both are from the same manufacturer and formated with the FAT16 file system. When I check the permissions of the files/folder I see myself as owner with read/write permissions on both drives.
the error message on the console is:
rm: cannot remove 'foo': Read-only file system
I'd really like to give you more information but honestly I don't know where to look since one works and the other suddenly stopped working.
\edit: Checked dmesg:
[ 769.912866] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 123716903)
[ 769.912871] FAT-fs (sdb1): Filesystem has been set read-only
Seems to be the problem. Any ideas?
Thanks in advance!
Last edited by Barghest (2012-06-20 07:06:48)

I wasn't aware that FAT filesystems had a concept of file permissions or ownership...
First of all, reboot if you recently updated your system. Because the linux package (the kernel) was also updated. Then install and use gparted to format the drive.

[SOLVED]USB flash drive no longer showing up in /dev

Similar Messages

Maybe you are looking for