USB storage devices not shown in Finder, yet function, and show in System Information?

Occurring starting about last month, this has gone from a seldom, to all the time situation. plugging in any USB memory device either directly to the computer, or with cables, will allow the files to be accessed/changed/deleted by programs, but the device with it's files will not show in finder. The device shows in System information. I have set Finder to show everything, but they no longer apear. Before failing entirely, I would sometimes have the device show for a short time, then get an "Improper removal" error, without touching the device, after a few moments. All these memory devices still function properly when used in external devices and when direcly accesed by software. Not being able to use finder to modify content is a significant problem.

Well I'm about out of ideas. Going off what you described, these devices work fine elsewhere and gradually failed on your computer.
Unless someone else can post other ideas, I only can suggest a reinstall of Lion from scratch. I would make sure I had a good backup from TM and an additional backup of your important files just in case.
Probably the easiest way would be to make a bootable USB stick or drive to work from. Procedure here: http://osxdaily.com/2011/07/08/make-a-bootable-mac-os-x-10-7-lion-installer-from -a-usb-flash-drive/
If you can accomplish that, see if you can boot from it. If so, use Disk Utility to erase the main drive and reformat it. Verify the drive is OK. Then quit Disk Utility abd procede to install Lion.
When the installation is finished, reboot and use Setup Assistant imediately to migrate your user data and applications back from the TM drive. Don't use migration assistant later.
I doubt it will help since the Comb-Update didn't fix it, but who knows.

Similar Messages

USB storage devices not being recognised

Product:
13" Macbook Pro w/ Retina Display (Late 2013 model)
OS X Yosemite (version 10.10.2)
2.4GHz i5, 8gb 1600 MHz DDR3, 256gb HDD
Issue:
- macbook unable to recognise USB storage devices.
- can be found on disk utility but 'greyed out'.
- cannot be found under devices in finder.
- tried restarting laptop, no effect.
- additional storage via Nifty + 64gb micro SD is working fine.
- apple products (iPod/iPhone/iPad) and printer/scanner working fine, only storage devices appear to be affected.
- USB-ethernet adapter appears to be working w/o problems too.
- last technical thing done to the computer was SMC reset 5 days ago for power cable light not working properly (fixed with reset).
Hello everyone,
I seem to having some issues with my macbook and the ability to use USB storage devices. The SD card slot appears to be working fine as I have a nifty device attached on. I'm not sure exactly when this started to happen but it was working last week for sure.
I've put some succinct notes above for anyone who is willing to help out and is able to use it to determine the problem but I don't think it's a hardware issue. Maybe it's a bug with the new OS X update over the weekend?
I've attached a screenshot of the disk utility below as well.
If anyone could help me out then that would be greatly appreciated.
Thanks in advance!

Some users on another Apple thread had success in running Kext Utility last November with similar issues.
I ran kext utility 2.6.1, restarted my computer and everything was working again.

USB Storage devices not working with kernel in repositories [Solved]

I am experiencing a quite vexing problem with my USB Mass Storage devices, when I plug one in I get the following error in my dmesg:
[ 1811.976758] usb 2-2: new high speed USB device number 5 using ehci_hcd
[ 1812.101854] scsi7 : usb-storage 2-2:1.0
[ 1813.102576] scsi 7:0:0:0: Direct-Access Verbatim STORE N GO 2.68 PQ: 0 ANSI: 2
[ 1813.103818] sd 7:0:0:0: [sdb] 3913728 512-byte logical blocks: (2.00 GB/1.86 GiB)
[ 1813.104327] sd 7:0:0:0: [sdb] Write Protect is off
[ 1813.104331] sd 7:0:0:0: [sdb] Mode Sense: 0b 00 00 08
[ 1813.105567] sd 7:0:0:0: [sdb] No Caching mode page present
[ 1813.105572] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[ 1813.107560] sd 7:0:0:0: [sdb] No Caching mode page present
[ 1813.107565] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[ 1813.108340] sdb: sdb1
[ 1813.112180] sd 7:0:0:0: [sdb] No Caching mode page present
[ 1813.112186] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[ 1813.112190] sd 7:0:0:0: [sdb] Attached SCSI removable disk
[ 1813.196828] sdb: detected capacity change from 2003828736 to 0
In the /dev/ folder on the device shows up, not the partitions. When I try to open it with cfdisk I get "FATAL ERROR: Cannot open disk drive". I am pretty sure it iss neither a hardware problem with my laptop or my usb devices, as they both work on my dual-booted Ubuntu. My usb ports in general seem to be functioning, I can still charge a phone through them and use my built in USB webcam.
I am not sure where exactly this issue lies, it started after I upgraded to 3.0.7 (among other updates) from the normal repositories, but still persisted after I downgraded to 3.0.6.
My attempts at Googling have so far revealed mainly hardware errors, which don't seem to fit with the devices working on another OS on the same pc.
Thanks.
Last edited by MartianW (2011-11-09 16:30:15)

Same problem. I try to mount different devices. For each device same result.
The file /var/log/error.log is full of this kind of messages:
Nov 4 21:34:18 moria kernel: [ 113.455195] sd 6:0:0:0: [sdb] No Caching mode page present
Nov 4 21:34:18 moria kernel: [ 113.455200] sd 6:0:0:0: [sdb] Assuming drive cache: write through
Nov 4 21:35:29 moria kernel: [ 184.077728] sd 7:0:0:0: [sdb] No Caching mode page present
Nov 4 21:35:29 moria kernel: [ 184.077736] sd 7:0:0:0: [sdb] Assuming drive cache: write through
Nov 4 21:35:29 moria kernel: [ 184.080720] sd 7:0:0:0: [sdb] No Caching mode page present
Nov 4 21:35:29 moria kernel: [ 184.080730] sd 7:0:0:0: [sdb] Assuming drive cache: write through
Nov 4 21:35:30 moria kernel: [ 184.808109] sd 7:0:0:0: [sdb] No Caching mode page present
Nov 4 21:35:30 moria kernel: [ 184.808116] sd 7:0:0:0: [sdb] Assuming drive cache: write through
Nov 4 21:41:10 moria kernel: [ 525.107109] sd 8:0:0:0: [sdb] No Caching mode page present
Nov 4 21:41:10 moria kernel: [ 525.107114] sd 8:0:0:0: [sdb] Assuming drive cache: write through
Nov 4 21:41:10 moria kernel: [ 525.110615] sd 8:0:0:0: [sdb] No Caching mode page present
Nov 4 21:41:10 moria kernel: [ 525.110619] sd 8:0:0:0: [sdb] Assuming drive cache: write through
Nov 4 21:41:11 moria kernel: [ 525.841487] sd 8:0:0:0: [sdb] No Caching mode page present
Nov 4 21:41:11 moria kernel: [ 525.841491] sd 8:0:0:0: [sdb] Assuming drive cache: write through

USB Storage devices not being detected - device nodes not created?

Hi,
I've installed Arch Linux 64-bit on my Dell workstation, and it doesn't seem to be picking up my USB storage drives. Kernel version is 3.6.3-1.
When I plug in a drive, I see in dmesg:
[391147.657574] usb 1-8: new high-speed USB device number 6 using ehci_hcd
However, I don't see anything else. There's nothing about creating device nodes, or anything like that.
My output from `fstab -l` doesn't seem to mention anything about USB drives either, just my two system drives.
[victorhooi@arch-precision ~]$ sudo fdisk -l
[sudo] password for victorhooi:
WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sda: 80.0 GB, 80000000000 bytes, 156250000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0f2d18e3
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 718847 358400 7 HPFS/NTFS/exFAT
/dev/sda2 718848 156246015 77763584 7 HPFS/NTFS/exFAT
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdb: 80.0 GB, 80000000000 bytes, 156250000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x3a9c7de5
Device Boot Start End Blocks Id System
/dev/sdb1 1 156249999 78124999+ ee GPT
My output from lsusb:
[victorhooi@arch-precision ~]$ lsusb
Bus 001 Device 006: ID 0930:6545 Toshiba Corp. Kingston DataTraveler 102 Flash Drive / HEMA Flash Drive 2 GB / PNY Attache 4GB Stick
Bus 002 Device 002: ID 413c:2003 Dell Computer Corp. Keyboard
Bus 002 Device 003: ID 04b3:310d IBM Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Output from blkid - both before and after inserting the drive is identical:
[victorhooi@arch-precision ~]$ blkid -o list -c /dev/null
device fs_type label mount point UUID
/dev/sda1 (not mounted)
/dev/sda2 (not mounted)
/dev/sdb1 /boot
/dev/sdb2 (not mounted)
/dev/sdb3 (not mounted)
When I installed my kernel, I saw warnings about fsck.btrfs - not sure if that's related though:
>>> Generating initial ramdisk, using mkinitcpio. Please wait...
==> Building image from preset: 'default'
-> -k /boot/vmlinuz-linux -c /etc/mkinitcpio.conf -g /boot/initramfs-linux.img
==> Starting build: 3.6.5-1-ARCH
-> Running build hook: [base]
-> Running build hook: [udev]
-> Running build hook: [autodetect]
-> Running build hook: [pata]
-> Running build hook: [scsi]
-> Running build hook: [sata]
-> Running build hook: [filesystems]
-> Running build hook: [usbinput]
-> Running build hook: [fsck]
==> ERROR: file not found: `fsck.btrfs'
==> WARNING: No fsck helpers found. fsck will not be run on boot.
==> Generating module dependencies
==> Creating gzip initcpio image: /boot/initramfs-linux.img
==> WARNING: errors were encountered during the build. The image may not be complete.
==> Building image from preset: 'fallback'
-> -k /boot/vmlinuz-linux -c /etc/mkinitcpio.conf -g /boot/initramfs-linux-fallback.img -S autodetect
==> Starting build: 3.6.5-1-ARCH
-> Running build hook: [base]
-> Running build hook: [udev]
-> Running build hook: [pata]
-> Running build hook: [scsi]
-> Running build hook: [sata]
-> Running build hook: [filesystems]
-> Running build hook: [usbinput]
-> Running build hook: [fsck]
==> Generating module dependencies
==> Creating gzip initcpio image: /boot/initramfs-linux-fallback.img
==> Image generation successful
error: command failed to execute correctly
I checked the output from lsmod, I dont' see usb-storage, but I do see sd_mod.
Any thoughts?
Cheers,
Victor

WonderWoofy wrote:At least that is one of the very few times you have to reboot. MS just never actually ships you a new kernel. I have never been able to understand why I need to reboot my machine in windows when I install something like a word processor. What is it actually doing?
I have no idea, too. I usually don't reboot even after kernel update, because I always think "Oh, what the heck, I'll reboot it eventually anyway". As we can see, it's not always a good idea .
WonderWoofy wrote:Edit: Don't forget to mark as solved!
We have to wait for @victorhooi to confirm it .

USB Storage Devices not showing up in My Computer

I have had this issue for sometime now, and I have not been able to find my solution. Hopefully, someone may be able to assist.
I have done most of what other forums have said, including formatting the Disk in Disk Manager (It gives me an error every time I attempt to assign a letter or try to format it). It's not just my USB Thumb Drive either, its my phone, my mouse, everything
USB related. It just won't read any devices what so ever.
Thanks in advance,
Cobey

Hi Cobey,
It sounds like a USB driver issue if it affect all USB devices. Let's test to replace USB related inf files to see if issue could be fixed.
Please:
1. Uninstall your USB device in DEVMGMT.MSC (Device Manager).
2. Open Windows Explorer and go to C:\Windows\System32\DriverStore\FileRepository.
3. Find folders with the name usbstor.inf_xxxxxxxx. Open the folder with the newest date.
4. Copy usbstor.inf and usbstor.PNF inside and replace the same files in C:\Windows\inf.
Reboot to see if issue still exists.
If you have any feedback on our support, please send to [email protected]

Phatnoise Mass USB Storage Device : Not being detected anymore by my Mac...

Basically as the title says really.
It worked perfectly fine a few months ago and now nothing at all.
When I plug the USB lead in it used to be recognized straight away.
I have tried rebooting my Mac with the device already connected and that still has not solved the problem.
Any help appreciated.
Thanks

Regardless of what problems you do or don't have, you need to have a backup. These computers are mechanical beasts and can fail at any time.
That being said, if I was in your place I'd try going back to 10.5.6 to see if things keep working. If you have your original install discs (if the machine came with Leopard) or the Leopard disc you used to upgrade, you could try doing an Archive & Install, and once that completes, install the 10.5.6 combo update.
If things work well there, you could just stay at 10.5.6. If you want to further test things, upgrade to 10.5.7 again and make sure you use the combo update from Apple's download page. If the 10.5.7 update breaks things again, you may want to contact the manufacturer and let them know so they can look into things.
Hope that helps--sorry for being a bit long-winded. If you have more questions, feel free to ask!
~Lyssa

USB Thumbdrive causes "Mass Storage Device Not Responding"...

Everytime I connect a thumbdrive to my MBP, I cannot eject it. I always get the "disk in use" message.
When I go into Activity Monitor, I see "Mass Storage Device Not Responding" and it's eating up a lot of system resources.
After a short period of time, the fan will come on full blast, and stay on until I force the program to quit.
The only way I can eject the thumbdrive is to force quit through Activity Monitor.
I've tried multiple thumbdrives on every USB port and I get the same result.
I've searched through the Support site, but haven't found a solution.

Hi @Eman_Gamal
Welcome to the HP Forums!
It is a terrific place to find answers.
For you to have the best experience in the HP forum I would like to direct your attention to the HP Forums Guide Learn How to Post and More
I grasp that your USB ports are no longer functioning correctly. When you checked Device Manager under device status you see this message" cannot verify the digital signature for the drivers required for this device".
As they were previously working have you tried rolling back the drive in Device Manager?
Have you ran the HP Support Assistant to acquire any HP updates?
Have you tried using MS Fix it ?
Here is a link to the recommended drivers for your notebook. HP Pavilion dv6-6c45se Entertainment Notebook PC Drivers Please ensure you have all the latest updates installed.
If the above has not helped as it was previously working you could try a restore back to a known good date.
Using Microsoft System Restore (Windows 7)
Lastly you could do a recover back to factory.
Performing an HP system recovery (Windows 7)
There is an opportunity during the recovery to backup your personal files to prevent data loss. Now is the time to do one if not previously done.
Restoring Files that were Backed Up Using HP Recovery Manager (Windows 7)
At any time you may contact HP support for assistance. They can remotely access your system tto help you overcome difficulties.
Please call our technical support at 800 474 6836. If you live outside the US/Canada Region, please click the link below to get a support number for your region.
World Wide Phone Support
Good Luck!
Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!

Latest Initrd not recognising USB storage devices?

Just installed 2.6.30 with all the necessary files. Everything seemed fine, except for one thing: my external USB hard drive is no longer recognised on boot. Here is my fstab and my mkinitcpio.conf.
# /etc/fstab: static file system information
# <file system> <dir> <type> <options> <dump> <pass>
none /dev/pts devpts defaults 0 0
none /dev/shm tmpfs rw,noexec,nosuid 0 0
#/dev/cdrom /media/cd auto ro,user,noauto,unhide 0 0
#/dev/dvd /media/dvd auto ro,user,noauto,unhide 0 0
#/dev/fd0 /media/fl auto user,noauto 0 0
UUID=139cf76d-425a-4c40-a5b1-bbbf22533d9a /boot ext4 defaults 0 1
UUID=4eddd177-23f6-49ab-a8ad-d3e1303133e0 / ext4 defaults 0 1
UUID=ED83-B8D4 /media/flash vfat rw,user,noauto 0 0
#UUID=ac46c6ae-d9eb-47d4-809b-19a2484b3133 /iomega ext4 rw,noexec,nosuid 0 1
UUID=ac46c6ae-d9eb-47d4-809b-19a2484b3133 /media/iomega ext4 rw,user,noauto 0 0
UUID=da9e741f-3525-47c6-8c7f-edf1ded00e7a swap swap defaults 0 0
As you can see from this, I originally had my external usb drive mounted on /iomega @ boot. However, since that no longer works, I have changed it to /media/iomega and let HAL mount it automatically when I fire up GNOME (the same way I have my flash drive set up). I used the original line with 2.6.29 with no problems.
The strange thing is, the device is there, because, when it fails, I go into single user mode, remount / read-write and then run mount -a and the device appears with no errors. If I change the line so it doesn't do an fsck on boot, it doesn't mount the device, but I do get an error saying the device is not there. I can then mount it manually at the command prompt.
The device is shown in /etc/blkid.tab and in /dev/disk/by-uuid.
# vim:set ft=sh
# MODULES
# The following modules are loaded before any boot hooks are
# run. Advanced users may wish to specify all system modules
# in this array. For instance:
# MODULES="piix ide_disk reiserfs"
MODULES=""
# BINARIES
# This setting includes, into the CPIO image, and additional
# binaries a given user may wish. This is run first, so may
# be used to override the actual binaries used in a given hook.
# (Existing files are NOT overwritten is already added)
# BINARIES are dependancy parsed, so you may safely ignore libraries
BINARIES=""
# FILES
# This setting is similar to BINARIES above, however, files are added
# as-is and are not parsed in anyway. This is useful for config files.
# Some users may wish to include modprobe.conf for custom module options,
# like so:
# FILES="/etc/modprobe.conf"
FILES=""
# HOOKS
# This is the most important setting in this file. The HOOKS control the
# modules and scripts added to the image, and what happens at boot time.
# Order is important, and it is recommended that you do not change the
# order in which HOOKS are added. Run 'mkinitcpio -H <hook name>' for
# help on a given hook.
# 'base' is _required_ unless you know precisely what you are doing.
# 'udev' is _required_ in order to automatically load modules
# 'modload' may be used in place of 'udev', but is not recommended
# 'filesystems' is _required_ unless you specify your fs modules in MODULES
# Examples:
# This setup specifies all modules in the MODULES setting above.
# No raid, lvm2, or encrypted root is needed.
# HOOKS="base"
# This setup will autodetect all modules for your system and should
# work as a sane default
# HOOKS="base udev autodetect pata scsi sata filesystems"
# This is identical to the above, except the old ide subsystem is
# used for IDE devices instead of the new pata subsystem.
# HOOKS="base udev autodetect ide scsi sata filesystems"
# This setup will generate a 'full' image which supports most systems.
# No autodetection is done.
# HOOKS="base udev pata scsi sata usb filesystems"
# This setup assembles an pata raid array with an encrypted root FS.
# Note: See 'mkinitcpio -H raid' for more information on raid devices.
# HOOKS="base udev pata raid encrypt filesystems"
# This setup loads an lvm2 volume group on a usb device.
# HOOKS="base udev usb lvm2 filesystems"
HOOKS="base udev autodetect pata scsi sata usb keymap filesystems"
# COMPRESSION
# Use this to compress the initramfs image. With kernels earlier than
# 2.6.30, only gzip is supported, which is also the default. Newer kernels
# support gzip, bzip2 and lzma.
#COMPRESSION="gzip"
#COMPRESSION="bzip2"
#COMPRESSION="lzma"
This is essentially the same as I had it in 2.6.29. I did initially use LZMA, since that gives slightly faster compression & decompression, but changed it back in case it was a timing issue (and rebuilt initrd). No joy. I also tried usbdelay=10 on boot, but again no difference.
This isn't exactly a "show-stopper", since the device functions normally otherwise and everything else is fine, but it is annoying. I would much rather have this device available automatically on boot, so that it gets checked when the max mount count comes up.

This was the bug update I received today:
FS#15282 - [mkinitcpio] Latest initrd not recognising usb storage devices?
User who did this - Thomas Bächler (brain0)
You can never rely on external hard drives to show up "in time".
The difference was that adding the "usb" hook to mkinitcpio used to add a 6 second delay on boot by default, this doesn't happen anymore. I think external drives simply don't belong in fstab, because there's too many possible race conditions. If you insist, you can try to force the usb storage driver to scan for devices sooner after detection, see the delay_use parameter to the usb-storage module.
You're going to have to modify the delay_use parameter to get it to work. Be prepared for race conditions, though. I didn't bother myself as it wasn't a show stopper for me, so I've advised that it can be closed as a non-bug.
ETA: usbdelay=10 doesn't work as that flag is apparently no longer recognised for some reason.
ETTA: I've always used UUID in the fstab because udev can remap devices on boot (I've had fstab not recognising devices because of this).
In case some people don't know, to see what the uuid for a device is, use the following:
sudo tune2fs -l <device-name>
Last edited by jamesbannon (2009-06-28 18:30:23)

Windows Server 2012 Group Policy Block USB Storage devices @ User Level Not getting applied on a Domain Client machine with Windows Server 2008 R2. Why?

Hello,
I have a Windows Server 2012 R2.
I have configured the Group Policy on it to block the usage of USB - Storage Devices @ user level on the client machines. It works properly for my Windows 7 client machines but it's not working on one of the machine having Windows Server 2008 R2 installed
on it (this machine is also a domain client in the same domain).
I will really be thankful if anyone can suggest some solution to this issue.
Please feel free to write back in-case I have missed anything obvious to be shared.
Thanks!
-Vinay Pugalia
If a post answers your question, please click "Mark As Answer" on that post or
"Vote as Helpful".
Web : Inkey Solutions
Blog : My Blog
Email : Vinay Pugalia

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[solved] usb-storage-devices (sticks) are not longer mapped via citrix

Hello,
at work we have linux-clients (Arch, Plasma5, updated weekly) connected to a computing center (Win 2008 Servers) via citrix-receiver. In the past, usb-storage-devices were mapped, so we could acces them in Win. Now, they are not longer mapped. I can't say, since when. USB-Sticks are not in daily use. The computing center says, nothing has been changed there. So can someone help me to fix this issue?
Found solution myself: https://wiki.archlinux.org/index.php/Ud … udisks2.29
Last edited by uhoso (2015-04-23 08:57:49)

Hello,
at work we have linux-clients (Arch, Plasma5, updated weekly) connected to a computing center (Win 2008 Servers) via citrix-receiver. In the past, usb-storage-devices were mapped, so we could acces them in Win. Now, they are not longer mapped. I can't say, since when. USB-Sticks are not in daily use. The computing center says, nothing has been changed there. So can someone help me to fix this issue?
Found solution myself: https://wiki.archlinux.org/index.php/Ud … udisks2.29
Last edited by uhoso (2015-04-23 08:57:49)

Pls help! USB Storage Devices does not work for K7N2 Delta-L

hi all,
I am pulling my hair out trying to resolve this issue.
Everytime i plug in a USB Storage Device/Thumb Drive(eg Creative NOMAD), my system gives an error saying task cannot be performed due to a I/O device error.
Yet, the USB ports work well with other USB devices like mouse, keyboard, USB sound cards, printers and so forth??!!
I am using WinXP SP1 and have installed the patch that comes on the CD driver. Pls help me out if you know the answer. ...
Thanks!
Les

I'm pretty much going to confirm the same going with compatibility issues here...there is still alot of hardware out there on the market that is incompatible with many other types of hardware...
We've reached the day when alot of us like to think that ALL manufacturer devices should work flawlessly with everyone else's devices on the market. This just isn't the case and I don't ever see this being the case. Ideally it would be nice but the fact is is that no company can "cover all the bases" in this respect. There are literally hundreds of thousands of hardware mfg's out there now and this cannot be a reality unless the PC world goes Apple. Same standards for all period. No fluctuation or ability to expand on new ideas without going to the "Standard Setting Company" directly for full testing capability.
Regardless of that fact, I'm kinda surprised that you can't get this device to work on your rig. Have you tried a fresh install of XP? Have you tried using a PCI USB device to see if the MB ports are bad? Could be that the MB has a problem that doesn't show until you use that device...many things to try here to troubleshoot your problem.
Bonz 8)

[solved] USB storage devices problem

Hello everyone. I have MSI Wind U270 and recently I've moved from Ubuntu 11.04 to Arch. I really like Arch so far but I have one quite big problem and I can't find any solution, so I hope someone here could help me.
After I'd installed Arch, I tried to copy some file from/to USB flash drive. After just few seconds, transfer failed with information about I/O errors and USB flash drive disappeared along with any other USB drives connected at the same time but logitech usb mouse and keyboard continue to work.
My first thought was that it's simply broken USB drive, but same thing was happening also when I tried to move some files from/to any other USB storage device that I have.
Here is sample dmesg output after I connect device:
[ 4799.189720] usb 1-2: new high-speed USB device number 4 using ehci_hcd
[ 4799.369911] xhci_hcd 0000:06:00.0: PME# disabled
[ 4799.369935] xhci_hcd 0000:06:00.0: setting latency timer to 64
[ 4799.399707] ehci_hcd 0000:00:13.2: BAR 0: set to [mem 0xfeb48000-0xfeb480ff] (PCI address [0xfeb48000-0xfeb480ff])
[ 4799.399754] ehci_hcd 0000:00:13.2: restoring config space at offset 0x1 (was 0x2b00000, writing 0x2b00013)
[ 4799.399800] ehci_hcd 0000:00:13.2: PME# disabled
[ 4799.399819] ehci_hcd 0000:00:13.2: PCI INT B -> GSI 17 (level, low) -> IRQ 17
[ 4799.426731] ohci_hcd 0000:00:12.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[ 4799.520213] ohci_hcd 0000:00:13.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[ 4799.690262] usbcore: registered new interface driver uas
[ 4799.704107] Initializing USB Mass Storage driver...
[ 4799.704420] scsi7 : usb-storage 1-2:1.0
[ 4799.704959] usbcore: registered new interface driver usb-storage
[ 4799.704966] USB Mass Storage support registered.
[ 4801.166512] scsi 7:0:0:0: Direct-Access JetFlash Transcend 8GB 1100 PQ: 0 ANSI: 0 CCS
[ 4801.168550] sd 7:0:0:0: [sdc] 15826944 512-byte logical blocks: (8.10 GB/7.54 GiB)
[ 4801.169401] sd 7:0:0:0: [sdc] Write Protect is off
[ 4801.169411] sd 7:0:0:0: [sdc] Mode Sense: 43 00 00 00
[ 4801.170332] sd 7:0:0:0: [sdc] No Caching mode page present
[ 4801.170340] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 4801.175736] sd 7:0:0:0: [sdc] No Caching mode page present
[ 4801.175747] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 4801.176962] sdc: sdc1
[ 4801.181454] sd 7:0:0:0: [sdc] No Caching mode page present
[ 4801.181465] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 4801.181471] sd 7:0:0:0: [sdc] Attached SCSI removable disk
[ 4801.388155] xhci_hcd 0000:06:00.0: PME# enabled
[ 4801.439601] ehci_hcd 0000:00:13.2: PCI INT B disabled
[ 4801.439657] ehci_hcd 0000:00:13.2: PME# enabled
[ 4801.519628] ohci_hcd 0000:00:12.0: PCI INT A disabled
[ 4802.346484] ohci_hcd 0000:00:13.0: PCI INT A disabled
and when I start to copy some things to/from USB device this is what's happening:
[ 4981.389262] ehci_hcd 0000:00:12.2: force halt; handshake ffffc90000c1e024 00004000 00000000 -> -110
[ 4981.389271] ehci_hcd 0000:00:12.2: HC died; cleaning up
[ 4981.389377] usb 1-2: USB disconnect, device number 4
[ 4981.399810] sd 7:0:0:0: [sdc] Unhandled error code
[ 4981.399820] sd 7:0:0:0: [sdc] Result: hostbyte=0x01 driverbyte=0x00
[ 4981.399826] sd 7:0:0:0: [sdc] CDB: cdb[0]=0x2a: 2a 00 00 1f b4 7e 00 00 08 00
[ 4981.399840] end_request: I/O error, dev sdc, sector 2077822
[ 4981.399850] Buffer I/O error on device sdc1, logical block 259720
[ 4981.399854] lost page write due to I/O error on sdc1
[ 4981.404451] sd 7:0:0:0: [sdc] Unhandled error code
[ 4981.404461] sd 7:0:0:0: [sdc] Result: hostbyte=0x01 driverbyte=0x00
[ 4981.404467] sd 7:0:0:0: [sdc] CDB: cdb[0]=0x2a: 2a 00 00 20 34 7e 00 00 f0 00
[ 4981.404481] end_request: I/O error, dev sdc, sector 2110590
[ 4981.404489] Buffer I/O error on device sdc1, logical block 263816
[ 4981.404493] lost page write due to I/O error on sdc1
[ 4981.404500] Buffer I/O error on device sdc1, logical block 263817
[ 4981.404504] lost page write due to I/O error on sdc1
[ 4981.404509] Buffer I/O error on device sdc1, logical block 263818
[ 4981.404512] lost page write due to I/O error on sdc1
[ 4981.404517] Buffer I/O error on device sdc1, logical block 263819
[ 4981.404521] lost page write due to I/O error on sdc1
[ 4981.404525] Buffer I/O error on device sdc1, logical block 263820
[ 4981.404529] lost page write due to I/O error on sdc1
[ 4981.404534] Buffer I/O error on device sdc1, logical block 263821
[ 4981.404537] lost page write due to I/O error on sdc1
[ 4981.404543] Buffer I/O error on device sdc1, logical block 263822
[ 4981.404546] lost page write due to I/O error on sdc1
[ 4981.404550] Buffer I/O error on device sdc1, logical block 263823
[ 4981.404554] lost page write due to I/O error on sdc1
[ 4981.444899] usb 1-4: USB disconnect, device number 3
Next I thought – computer is broken. But it simply couldn't be true because in Ubuntu it's working.
I wanted to test if USB transfer is working in other distros, so I downloaded few and tried:
Ubuntu 11.04 – everything is working
Ubuntu 11.10 – it's not working, exactly same errors as in Arch
Ubuntu 12.04 Alpha 2 – it's not working
Mint 11 – it's working
Mint 12 – it's not working
So one thing in common that I can think of is fact that USB transfer is working in distros using kernel <3.0 and is broken in those using kernel >=3.0.
In dmesg output I can see ehci_hcd errors. When I remove this module before moving files, than everything is working fine apart from very slow transfer but it's obvious.
I really hope that someone will be able to help with my problem. I don't know if it's some bug or it's just some configuration error.
EDIT: problems were caused by rts5139 module (card reader). Blacklisting that module solved all the problems.
Last edited by wpb (2012-07-01 08:37:02)

Ok, so here is part of /var/log/messages.log with failed USB transfer:
Feb 28 20:21:40 localhost kernel: [ 117.263584] usb 3-2: new high-speed USB device number 4 using ehci_hcd
Feb 28 20:21:40 localhost mtp-probe: checking bus 3, device 4: "/sys/devices/pci0000:00/0000:00:12.2/usb3/3-2"
Feb 28 20:21:40 localhost kernel: [ 117.470130] ehci_hcd 0000:00:13.2: BAR 0: set to [mem 0xfeb48000-0xfeb480ff] (PCI address [0xfeb48000-0xfeb480ff])
Feb 28 20:21:40 localhost kernel: [ 117.470251] ehci_hcd 0000:00:13.2: PCI INT B -> GSI 17 (level, low) -> IRQ 17
Feb 28 20:21:40 localhost kernel: [ 117.546266] ohci_hcd 0000:00:13.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
Feb 28 20:21:40 localhost mtp-probe: bus: 3, device: 4 was not an MTP device
Feb 28 20:21:42 localhost kernel: [ 119.687034] usbcore: registered new interface driver uas
Feb 28 20:21:42 localhost kernel: [ 119.692675] Initializing USB Mass Storage driver...
Feb 28 20:21:42 localhost kernel: [ 119.693029] scsi7 : usb-storage 3-2:1.0
Feb 28 20:21:42 localhost kernel: [ 119.694285] usbcore: registered new interface driver usb-storage
Feb 28 20:21:42 localhost kernel: [ 119.694294] USB Mass Storage support registered.
Feb 28 20:21:43 localhost kernel: [ 120.353657] ohci_hcd 0000:00:13.0: PCI INT A disabled
Feb 28 20:21:43 localhost kernel: [ 121.110815] scsi 7:0:0:0: Direct-Access JetFlash Transcend 8GB 1100 PQ: 0 ANSI: 0 CCS
Feb 28 20:21:43 localhost kernel: [ 121.115125] sd 7:0:0:0: [sdc] 15826944 512-byte logical blocks: (8.10 GB/7.54 GiB)
Feb 28 20:21:43 localhost kernel: [ 121.117132] sd 7:0:0:0: [sdc] Write Protect is off
Feb 28 20:21:43 localhost kernel: [ 121.125243] sdc: sdc1
Feb 28 20:21:43 localhost kernel: [ 121.130244] sd 7:0:0:0: [sdc] Attached SCSI removable disk
Feb 28 20:21:44 localhost kernel: [ 121.570240] ehci_hcd 0000:00:13.2: PCI INT B disabled
Feb 28 20:21:44 localhost ntfs-3g[1936]: Version 2012.1.15 external FUSE 28
Feb 28 20:21:44 localhost ntfs-3g[1936]: Mounted /dev/sdc1 (Read-Write, label "", NTFS 3.1)
Feb 28 20:21:44 localhost ntfs-3g[1936]: Cmdline options: rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,dmask=0077,fmask=0177
Feb 28 20:21:44 localhost ntfs-3g[1936]: Mount options: rw,nosuid,nodev,uhelper=udisks,allow_other,nonempty,relatime,fsname=/dev/sdc1,blkdev,blksize=4096,default_permissions
Feb 28 20:21:44 localhost ntfs-3g[1936]: Global ownership and permissions enforced, configuration type 1
Feb 28 20:22:11 localhost kernel: [ 148.692914] usb 3-2: USB disconnect, device number 4
Feb 28 20:22:11 localhost kernel: [ 148.756937] sd 7:0:0:0: [sdc] Unhandled error code
Feb 28 20:22:11 localhost kernel: [ 148.756947] sd 7:0:0:0: [sdc] Result: hostbyte=0x01 driverbyte=0x00
Feb 28 20:22:11 localhost kernel: [ 148.756954] sd 7:0:0:0: [sdc] CDB: cdb[0]=0x2a: 2a 00 00 1e 2f f6 00 00 18 00
Feb 28 20:22:11 localhost kernel: [ 148.756983] lost page write due to I/O error on sdc1
Feb 28 20:22:11 localhost kernel: [ 148.757000] lost page write due to I/O error on sdc1
Feb 28 20:22:11 localhost kernel: [ 148.757016] lost page write due to I/O error on sdc1
Feb 28 20:22:11 localhost kernel: [ 148.761894] sd 7:0:0:0: [sdc] Unhandled error code
Feb 28 20:22:11 localhost kernel: [ 148.761905] sd 7:0:0:0: [sdc] Result: hostbyte=0x01 driverbyte=0x00
Feb 28 20:22:11 localhost kernel: [ 148.761911] sd 7:0:0:0: [sdc] CDB: cdb[0]=0x2a: 2a 00 00 1e 2f ae 00 00 08 00
Feb 28 20:22:11 localhost kernel: [ 148.761939] lost page write due to I/O error on sdc1
Feb 28 20:22:11 localhost kernel: [ 148.914173] usb 3-4: USB disconnect, device number 3
Feb 28 20:22:24 localhost ntfs-3g[1936]: ntfs_attr_pread_i: ntfs_pread failed: Input/output error
Feb 28 20:22:24 localhost ntfs-3g[1936]: Reading $BITMAP failed: Input/output error
Feb 28 20:22:24 localhost ntfs-3g[1936]: Failed to allocate clusters: Input/output error
Feb 28 20:22:24 localhost kernel: [ 161.862408] quiet_error: 2 callbacks suppressed
Feb 28 20:22:24 localhost kernel: [ 161.862424] lost page write due to I/O error on sdc1
Feb 28 20:22:24 localhost kernel: [ 161.862436] lost page write due to I/O error on sdc1
Feb 28 20:22:24 localhost kernel: [ 161.862446] lost page write due to I/O error on sdc1
Feb 28 20:22:24 localhost kernel: [ 161.862457] lost page write due to I/O error on sdc1
Feb 28 20:22:24 localhost kernel: [ 161.862466] lost page write due to I/O error on sdc1
Feb 28 20:22:24 localhost kernel: [ 161.862476] lost page write due to I/O error on sdc1
Feb 28 20:22:24 localhost kernel: [ 161.862485] lost page write due to I/O error on sdc1
Feb 28 20:22:24 localhost kernel: [ 161.862495] lost page write due to I/O error on sdc1
Feb 28 20:22:24 localhost kernel: [ 161.862505] lost page write due to I/O error on sdc1
Feb 28 20:22:24 localhost kernel: [ 161.862514] lost page write due to I/O error on sdc1
Feb 28 20:22:24 localhost ntfs-3g[1936]: Unmounting /dev/sdc1 ()
and here is complete /var/log/messages.log - I just started system and then tried to copy some files to USB drive:

What USB storage devices have a block size of 512 bytes?

After pulling my hair out for weeks trying to get a usb hard drive to work with my new AirPort Extreme (802.11n), I ran across this
http://docs.info.apple.com/article.html?artnum=305038
AirPort Extreme (802.11n): USB storage device supported formats and protocols
You can connect USB-based storage devices to an AirPort Extreme (802.11n). Learn which formats and protocols are supported.
The AirPort Extreme (802.11n) supports USB storage devices that have a block size of 512 bytes, and are formatted as Mac OS Extended (HFS-plus), FAT16, or FAT32. Not all USB storage devices use a block size of 512 bytes.
The AirPort Extreme (802.11n) shares storage devices based on the format used to initialize the storage device. For example, if HFS-plus formatting was used, AFP and SMB/CIFS protocols are used to share the device on the network. If FAT16 or FAT32 was used, SMB/CIFS protocols are used.
The AirPort Extreme (802.11n) works with disks that have a single partition and are not software RAID volumes (no more than one volume per physical disk). If the disk is a self-contained RAID that presents itself to a computer as a single volume requiring no software support, then it is supported.
Note: Use AirPort Disk Utility to discover and mount AirPort Extreme-based volumes over the network.
Now, this information is not easily obtainable while
shopping for a new usb hard drive. How do I find out which
ones support this 512 byte block size????
Would have bee nice to know that not all usb hard drives
are supported by the AirPort Extreme (802.11n) before I
purchased it.
Thanks
J Riley

Duane posted a link to an unofficial 802.11n Airport Extreme Hard Drive Compatibility List.
http://www.ifelix.co.uk/tech/8014.html
Still not enough information to make an informed purchase that
will work.

Computer thinks i pod is a data usb storage device

Had to change the i pod into a data retrival. Done this enable disk use. Now i tunes wont find the i pod atall updating etc the module is there but the computer thinks its a usb storage device. I pod under edit prefrences is saying that no i pod conneced. Done a restore on i pod and used the updater. Uninstalled i tunes and installed it again and again. Orange lights and green lights are flashing on my i pod its locked me out of it. Why if ive restored it to factory settings wont it let me use it for music and not data retrival storage. Ive done a add hardware wizard it simply says usb storage device and not i pod which is what it has to be to get music. Ive looked for options on i tunes for the i pod and the icons gone so i cannot untick enable disk use. All usb hubs are working i am at a total loss at what to do please someone help me out thanks mr d roberts

That's exactly what mine said. Tried to uninstall completely and reinstall, and it still didn't work. Apple tech told me to take it to apple service centre. Take a look at my post.
Home > iPod > iPod shuffle > Connecting iPod shuffle to Windows > Can't get shuffle to show up as shuffle and not as xtra disk

My new iPhone 5 won't connect to iTunes, and when I connect to my computer it comes up as a usb storage device, also in the phone itself under usage it shows internal memory of 2gb and sd card 64 gb, is this an original iPhone or have I been sold a copy

My new iphone 5 can not connect to itunes, it comes up as a usb storage device when I plug it in, also in the phone under settings/usage it shows internal memory of 2gb and SD card of 64gb, I cannot get it to connect to itunes at all so cannot sync etc, is this a genuine Iphone or a copy. I have owned 4 iphones and never had a problem with connecting to iphones and restoreing to a backup.

According to http://en.wikipedia.org/wiki/IPhone_5
the iPhone5 has 1GB of RAM, and internal storage of 16, 32, or 64GB.
It does not use SD cards.
Fake iphones are really Android phones using the skin of iOS6.
Click on the App Store icon. If it takes you to Apple's App Store, then it's a real iPhone.
But if you are directed to Google Play, then I'm afraid you've gotten a copy.

USB storage devices not shown in Finder, yet function, and show in System Information?

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