USB 2.0 Mass Storage Device mounting issues and cannot write data on it

I have a 250 GB external Simpletech Hard Drive (with a USB 2.0 interface). It works flawlessly in a Windows XP environment (strange!!). But when I connect it to my iMac thru the USB port 2 things happen:
1. Sometimes it mounts, sometimes it does not. It's just capricious. If I boot the system with the USB device attached it mounts. If I connect it "hot", sometimes it does, sometimes it doesn't. Sometimes it does not appear as mounted...I disconect the device and the Mac gets angry.
2. I can read all the data on the disk, but I can't write any. That is, I cannot use it for backing up any iMac data. The backup utility won't recognize the device either.
I've seen people going thru the mounting issue (not sure if there is a solution), but I am puzzled about the inability to write data on the hard drive. I am wondering if this is due to a formatting incopatibility? Any hints??
iMac Mac OS X (10.4.10) 2.33 GHz, 2GB, 750 GB

For both the Mac and a Windows PC, format it as 'MS-DOS'.
Both platforms can read/write to it. A Windows PC is not capable of reading/writing to a Mac formatted (HFS, HFS+) disk without additional software.
MacFixit has been covering some apparent USB issues which may or may not help you. http://www.macfixit.com/
I'm still at a loss. I have yet to experience or reproduce the USB issues that a number of users seem to be having. Now that I have sufficient free time, I may look into it.

Similar Messages

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!

MSI Gt60 0nd wont recognize USB 3.0 mass storage device (WD)

Hi all
my notebook MSI Gt60 0ND wont recognize USB 3.0 mass storage device (WD), Western digital my passport 1TB USB 3.0 \ USB 2.0Compatible.
i connect the WD my passport to the SS USB 3.0 but it wont be recognized it only gives it electricity to spin but that's it, on the other hand if i connect it to the USB2.0 it is recognized.
i installed all the drivers from MSI to this computer the Intel USB 3.0 and the Intel chipset which are the only drivers that can be related to this.
i use windows 7, even when i had windows 8 it didn't work.
i tried upgrading the Western digital my passport firmware and even got the software thought that maybe it could help but still no luck.. any one got any idea for a solution ?
Thanks in advance,
David.

Does anything else work when you plug it into your USB 3.0 port? How about a mouse? Keyboard? Another USB Flash drive?
If nothing works in that port, your USB 3.0 port or card is probably bad. RMA time.

ITunes recognizes other mass storage devices/network but not iPod

When I plug my iPod into the computer, Windows and iTunes recognize that the iPod is connected. A windows bubble from the sys tray tells me that a mass storage device was detected, and a iPod icon appears in iTunes. However, iTunes does not connect to the iPod; for some reason it connects itself to the network (ethernet connection) or to my external hard drive (USB connection), in that order. It will recognize the network as the iPod, unless it is disconnected, and then it will recognize the hard drive as the iPod. If neither of these devices are connected, then the computer doesn't recognize the iPod at all unless I restart it. Thus, to get the computer to recognize my iPod, I have to disconnect my network, and my external hard drive, restart the computer and plug in the iPod. After this point, I can reconnect both devices and everything works. What's going on?

hi ephmike!
that sounds like classic symptoms of a Windows drive letter confusion problem. let's see if this document will help:
http://docs.info.apple.com/article.html?artnum=93499
keep us posted.
love, b

USB Ports - Mass Storage Devices - Unknown Device

Model: Satellite A135-S2276
OS: Vista
I recently tried plugging in my media card reader that I've had for several years now and has worked many dozens of times. Windows responded with an 'Unknown Device' response. I thought this was odd, so I changed and tried each USB port. To no avail the device wasn't recognized. I tried it in another computer and it worked fine.
I began to try two other mass storage devices that I know used to work, up until recently, on the laptop. Both now are 'Unknown Devices'. I now have a strong feeling that someting was wrong with windows vista. So I search around and find methods to force the driver (inf) cache to reset which should reload any corrupted drivers. Tried many methods, nothing worked, same results. I saw that Vista Service Pack 2 just came out, I installed that hoping that it would fix. Nope.
I gave up on it being a software issue after I did a fresh reinstall of the OS and with the base OS with no other software installed same results.
Is there a way to diagnose if the USB is malfunctioning from a hardware standpoint? Is it possible the USB, even thought windows recognizes it, is dead on the motherobard? If so, how do I get this fixed? Motherboard replacement?
Help!!

It sounds like it is working enough that it can recognize that soemthign is plugged into it.
You say you did a fresh install of Windows. Did you use the recovery disk or a retail Windows copy. If oyu didn't use the recovery disk then maybe you are missing a driver. Best woudl be to use the recovery disk. If a USB mouse doesn't work after that then the hardware has an issue. Assuming the BIOS is OK.
This signature left intentionally blank.

USB Mass Storage device problem

Hello, I cant use my USB mass storage device in my computer, it is a SanDisk ImageMate CF/SM unit, which works perfectly in every other computer I have tried it, but in this one it hangs while accessing the device, and in linux, it hangs while mounting it (the same thing).
I dont know what might the problem be but some other people have seen the same problem, perhaps someone here can help me.

Yeah, I though so, but first I wanted to know what might be causing this incompatibility, in the linux posts people have said that it is a nForce2 generic problem, perhaps a big nvidia bug? heh

USB Mass Storage Device won't Eject/Unmount

My brother bought a Sanyo ICR-B180NX digital voice recorder last year to use with his iBook. It was working very well up until about August of 2005. At that point, the recorder would mount on the desktop, and he could get all the files off (it records direct to MP3 format rather than WMV, so he can edit his files very easily), but when it came time to eject it, the device icon would disappear and then immediately re-appear on the desktop. The display on the voice recorder remained static at the "Connect" screen.
I believe this happened in conjunction with some sort of OS update, as it was a "sudden" thing. We can't quite recall what happened between the times it worked and the time it stopped working.
I have tried the device on a PC, and it works the way it should, so I don't believe there's anything wrong with it.
Now, I know the system requirements on the website say that you must have Windows, but a statement from a support company (we returned it to the place where we got it, and they sent it out for repairs, and it came back with a letter) states that the device does act as a generic Mass Storage device, and thus may work with most systems.
All my other USB storage devices (ie. SanDisk 12-in-1 card reader, SanDisk Cruzer Titanium 2GB, iPod Photo), and FireWire devices (ie. WiebeTech TrayDock Extreme) work fine and unmount fine.
Does anyone know of any changes to the way Mass Storage devices are ejected in the current iteration of the OS? I haven't had a chance to test the device under an older OS, but will soon.
Alternately, if anyone has any suggestions regarding replacements (not really looking forward to that, given this recorder cost almost $300CAD), let me know. We need a device that can plug in via USB and transfer files to his iBook which he can edit together (he's a newspaper reporter in training, and needs to edit the interviews to take out such things like dead air, etc).
Thanks!
Mike Ma.

Hi
+USB mass storage device. An error occurred during the installation of the device the data is invalid+
This typical error message appears if the installation of external USB devices failed.
Why? This is not easy to say
What you could do firstly is to clean your registry using the freeware software called CCleaner (Google for that).
Install it and clean your OS and the registry entries.
After cleaning access the device manager and remove all USB root hubs and all USB Host controllers from the device list and reboot the notebook.
New reboot should cause a new installation of USB drivers.
Finally try to connect and try to install your external USB devices again.

PCI USB Card Does NOT Work With Mass Storage Devices

I have a StarTech PCI card with 6 USB 2.0 ports that I inserted in my 500 MHz (overclocked) B&W Power Mac G3. It works great for any USB device EXCEPT for any hard drive or DVD/CD-RW drive. I checked the system.log file for errors. Nothing shows up in System Profiler or Disk Utility, obviously. Here's what it consistently says:
Dec 16 23:33:28 Geoff-Myers-Power-Mac-G3 kernel[0]: USBF: 674.997 [0xf9c000] The IOUSBFamily is having trouble enumerating a USB device that has been plugged in. It will keep retrying. (Port 6 of hub @ location: 0x62000000)
Dec 16 23:33:33 Geoff-Myers-Power-Mac-G3 kernel[0]: USBF: 679.977 [0xf9c000] The IOUSBFamily was not able to enumerate a device.
I'm running the latest version of Mac OS X Tiger 10.4.3. What is wrong? StarTech doesn't have a driver, but nothing should be necessary. Is there a 3rd party USB Mass Storage Device driver that might work better than the Apple generic driver? PLEASE HELP ME! I cannot live with USB 1.1.

Some users have reported problems with certain brand cards and their controller chipsets, so trying a different card may resolve the problem. Keyspan and Macally are often mentioned as being more "Mac-friendly" than some other lessser-known brands or generic cards. Does the card have a mini-power port to supplement the power requirements? With USB 2.0, each port is on a separate bus, so a card with six ports should have one. To minimize the overall draw on the available power, I prefer to install USB cards with as few ports as are needed.

My ipod 4th generation wont show up on itunes or my compute, but there is a file for USB mass storage device in my device management with a yellow triangle next to it. how do i get it to sync? HELP!!!

my ipod 4th generation wont show up on itunes or my compute, but there is a file for USB mass storage device in my device management with a yellow triangle next to it. how do i get it to sync? HELP!!!

Here:
iOS: Device not recognized in iTunes for Windows
I would start with
Removing and reinstalling iTunes, QuickTime, and other software components for Windows Vista or Windows 7
or
Removing and Reinstalling iTunes, QuickTime, and other software components for Windows XP

USB Mass Storage Device - ?

Shuffle shows up as a USB Mass Storage Device under the drive (USB Port) i plug it into.
It will not take an update or reformat.
Wondering if it is possible that the factory format could be erased and now the unit is just being recognized as a storage device and unable to be used in the manner it was originally intended for...MUSIC.?
What does it mean when you get a message "Media in Drive - Changed" ?
Fixed many other ipods in past but only one shuffle so far....now this one has me going...no clue what else i can do to it.
Any help would be appreciated.

i think it was trying to read the shuffle when i wanted to format and restore.
i never did get it to work.
no way of knowing now..i just got through tearing into this one to make one good shuffle out of the two i was working on.
all was good till i went to put the slide bar on/off switch back on....broke the switch again.
do you have a switch?
thanks

Mass Storage Driver Severe Crash - USB Mass Storage device useless

I am running the latest, updated version of OSX Leopard; Hardware Growler; and Parallels Desktop. Today, as I was doing a very resource-intensive task on Windows XP - via parallels - I plugged in my Samsung M610 to try to access the memory card. I then closed Windows XP, and noticed that my cpu was still registering at 100% output. Opening Activity Monitor and looking at the processes there, I saw that Mass Storage was taking 100.00 units of CPU output, and was not responding, I immediately clicked end process. Much to my dismay however, Activity Monitor then proceeded to lock up, so I forced it to quit, which caused finder to lock up in turn. Throughout this time, my cpu was still working overtime, so I decided to power the computer off. Upon rebooting and much "whew"-ing I tried to plug my Cell Phone in again; as usual Hardware Growler notified me of the connection and it's details, however, confusingly finder had no knowledge of any mass storage connection. After multiple connects and reconnects, testing all USB ports on my MBP (and being annoyed by the system telling me to properly find and eject hardware before removing it, which I suppose I should take as a good sign) my memory card remained invisible to finder. Hardware growler continues to perfectly recognize the device connection.
The most odd thing about this particular problem, is that other USB devices are recognized... at least one other Mass storage device is, but I have only one other device to test at the moment.... Any help would be greatly appreciated.

Check the following link and find the part of the text "Common resolutions for Code 10 error".
http://support.microsoft.com/kb/943104/en-us

USB 2 Mass storage device on Mac 0s 9.2.2.

I have a USB 2 mass storage device connected up to my Mac 0s 9.2.2. It is recognized as a USB 1 device.
Other than going to OS 10, is there a way to get USB 2 performance from my current classic Mac ?

Hi Ian;
This might be a reason to consider upgrading to OS X.
Allan

Arch instance living on USB mass storage device is very slow

I installed an instance of Arch on a USB stick. This is a full installation, not a ramdisk-based "installer" or anything. However, this little guy is very, very slow. Sometimes, I have to wait for almost a minute between writes while the UI locks up (XFCE4, in case you're curious).
I think a lot of the problem comes from iowait load and pending write requests. I've been considering experimenting with data=writeback, but I've never used this ext option before, and thought I'd ask you guys about it first. I hear that sudden power failure can lead to pretty severe data loss with writeback enabled. Anyone have any experience with this? Are there any other tweaks I can apply to increase performance that would be appropriate for a USB mass storage device? I have noatime enabled, but that only gives it an almost unnoticeable bump.

@hifi25nl You can link a post directly, by copying the link that is behind the date, at least with my theme, on the same height as the post number.
https://bbs.archlinux.org/viewtopic.php … 2#p1428782

Internal Flash Not Mounting as Mass Storage Device

I just switched from a Storm to a Tour. In Mass Storage Device Mode, the Storm would mount as two drives -- Blackberry1 for device memory and Blackberry2 for the SD card. The Tour only mounts Blackberry2. Anybody know why the difference or if this can be corrected? Thanks.

I used to see that same thing on the tour, but now I can not. I want to see my SYSTEM MEMORY IN WINDOWS EXPLORER!!!! PLEASE HELP!!!
I have a verizon tour 9630.

PCI Communication Controller and USB Mass Storage Device driver was missing

Hi,
Recently i formated HP Pavilion Slimline 400 PC series and reinstalled with windows 7 32 bit.\
initially i found a lot of driver was missing. i have gone through hp support forums and almost all drivers are running on 64 bit with minimum requirement OS windows 8.1.
i couldn't find it anywhere. under device manager, these two devices are being shown with yellow exclamation
PCI Simple Communication Controller :
PCI\VEN_8086&DEV_8C3A&SUBSYS_2AF7103C&REV_04
PCI\VEN_8086&DEV_8C3A&SUBSYS_2AF7103C
PCI\VEN_8086&DEV_8C3A&CC_078000
PCI\VEN_8086&DEV_8C3A&CC_0780
USB Mass Storage Device :
USB\VID_054C&PID_02A5&REV_0100
USB\VID_054C&PID_02A5
Please kindly provide the link for the drivers, so i can use my PC.
thanks in advance

Hi:
Did you install the USB3 controller driver so the device you installed could work?
https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=21129&lang=eng&ProdId=3467
The USB Mass Storage Device is something you have connected to the PC.
Specifically a Sony® MicroVault USB Flash Drive.
If my suggestion to let windows update find the Intel Management Engine driver, didn't work, see if this driver from Intel works. It also has the hardware ID for that device in the setup information file.
https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=22093&lang=eng

USB 2.0 Mass Storage Device mounting issues and cannot write data on it

Similar Messages

Maybe you are looking for