External USB 3.0 Hard Drive not recognized

Please help!!!!
I had been using my hard drive for a while and everything was fine, but when I went to plug it in today nothing happened. The blue light still comes on, but there are no sounds. It does not show up in windows explorer (8). It does, however, show up under "remove hardware safely," "devices and printers" and, as USB Mass Storage Device under USB Controllers in Device Manger. It does NOT show up in disk management.
I have tried every way of unplugging and re-plugging the USB cable and power cord (along with restarting/shutting down the computer). I have tried using different USB ports. I have tried using a different USB cable. I have tried unistalling the USB Controller in Device Manager and re-installing it (and one time I tried uninstalling it, then unplugging the power, then plugging power).
Now, I have had it plugged into my computer for about an hour, and when I open Devices and Printers, I can see it there, but it keeps disappearing and re-appearing.... this is where I am at... I am at a loss of what else to try.
Any help would be GREATLY appreciated!!!
Thanks!!!!!

Have you tried it with another computer? Does that computer see it?
- Peter

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External USB 2.0 Hard drive not showing up

I have a 120gb Western Digital external 2.0 USB hard drive.
When I plug the drive in (have tried both speeds of USB) nothing shows up.
The drive powers up and spins.
The first time I plugged it into the computer it ran perfectly. 5 minutes later after I restarted it would not show up.
I can confirm the drive works fine as it transferred data with no issue when it did show up.
I have tried the disk utility function and it just hangs and never resolves.
I have tried to look at it via the system profiler under the usb and again it just hangs.
This drive is used back and forth between a PC, my G4 Power book, and now this G5. For about 2 months it was working fine between the G4 and the PC. Just the other day it stopped working on the G4, and then when I tried it on the G5 I just got, as mentioned, it showed up the first time then nothing.
Any help would be fantastic.
Please note I'm not the most proficient in getting under the hood on these machines, so please talk slowly. lol

The USB disk icon is also lost. I had just finished re-formating the drive to the MAC format, backup up mail and all of my pictures - and 2 users of mail files. Shutdown the system to install Leopard from Tiger. My IMAC is 20 days old ... not a lot of files.
After Leopard was fully installed and updated with all fix's, I re-connected the drive, but it never appeared. A waited for a while .. no change, so I pulled the USB cable. Leopard give me a trap like error and said to old down the power button until powered off. When the system came back up .. its still not showing. I tried the Disk Util .. it does not see it also
Suggestions Greg

External USB 2.0 hard drive reconnects on its own after power-down

I have an external USB 2.0 hard drive which I'm trying to power off (after unmounting all partitions, of course) using:
$ udisksctl power-off --block-device /dev/sdb
When I do this, the drive spins back up after a few seconds. Only when I issue the same command again does the drive stay powered off.
I'm running:
linux 3.13.7-1
udisks2 2.1.3-1
This is what I see in the journal log when I:
- Plug in the drive's USB cable
- Issue the power-off command
- After the drive spins up again, issue the command again
Mar 29 19:51:01 miki-desktop kernel: usb 1-5: new high-speed USB device number 10 using ehci-pci
Mar 29 19:51:01 miki-desktop kernel: usb-storage 1-5:1.0: USB Mass Storage device detected
Mar 29 19:51:01 miki-desktop kernel: usb-storage 1-5:1.0: Quirks match for vid 1058 pid 0704: 8000
Mar 29 19:51:01 miki-desktop kernel: scsi12 : usb-storage 1-5:1.0
Mar 29 19:51:01 miki-desktop mtp-probe[21301]: checking bus 1, device 10: "/sys/devices/pci0000:00/0000:00:04.1/usb1/1-5"
Mar 29 19:51:01 miki-desktop mtp-probe[21301]: bus: 1, device: 10 was not an MTP device
Mar 29 19:51:02 miki-desktop kernel: scsi 12:0:0:0: Direct-Access WD 5000BMV External 1.75 PQ: 0 ANSI: 4
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/465 GiB)
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Write Protect is off
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Mode Sense: 23 00 00 00
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:02 miki-desktop kernel: sdb: sdb1 sdb2
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Attached SCSI disk
Mar 29 19:51:47 miki-desktop udisksd[21107]: Powering off /dev/sdb - successfully sent SCSI command START STOP UNIT
Mar 29 19:51:47 miki-desktop udisksd[21107]: Powered off /dev/sdb - successfully wrote to sysfs path /sys/devices/pci0000:00/0000:00:04.1/usb1/1-5/remove
Mar 29 19:51:47 miki-desktop kernel: usb 1-5: USB disconnect, device number 10
Mar 29 19:51:47 miki-desktop kernel: usb 2-5: new full-speed USB device number 9 using ohci-pci
Mar 29 19:51:48 miki-desktop kernel: usb 2-5: not running at top speed; connect to a high speed hub
Mar 29 19:51:48 miki-desktop kernel: usb-storage 2-5:1.0: USB Mass Storage device detected
Mar 29 19:51:48 miki-desktop kernel: usb-storage 2-5:1.0: Quirks match for vid 1058 pid 0704: 8000
Mar 29 19:51:48 miki-desktop kernel: scsi13 : usb-storage 2-5:1.0
Mar 29 19:51:48 miki-desktop mtp-probe[21555]: checking bus 2, device 9: "/sys/devices/pci0000:00/0000:00:04.0/usb2/2-5"
Mar 29 19:51:48 miki-desktop mtp-probe[21555]: bus: 2, device: 9 was not an MTP device
Mar 29 19:51:49 miki-desktop kernel: scsi 13:0:0:0: Direct-Access WD 5000BMV External 1.75 PQ: 0 ANSI: 4
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/465 GiB)
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] Write Protect is off
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] Mode Sense: 23 00 00 00
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:52 miki-desktop kernel: sdb: sdb1 sdb2
Mar 29 19:51:52 miki-desktop kernel: sd 13:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:52 miki-desktop kernel: sd 13:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:52 miki-desktop kernel: sd 13:0:0:0: [sdb] Attached SCSI disk
Mar 29 19:52:20 miki-desktop udisksd[21107]: Powering off /dev/sdb - successfully sent SCSI command START STOP UNIT
Mar 29 19:52:20 miki-desktop udisksd[21107]: Powered off /dev/sdb - successfully wrote to sysfs path /sys/devices/pci0000:00/0000:00:04.0/usb2/2-5/remove
Mar 29 19:52:20 miki-desktop kernel: usb 2-5: USB disconnect, device number 9
What is interesting is that on first connect, the drive is using ehci-pci driver, then after the first try powering it off, the drive appears to reconnect using the ohci-pci driver. Not just that, it appears to 'jump' from one USB bus to another. How is this even possible?
$ lspci
00:00.0 Host bridge: NVIDIA Corporation MCP73 Host Bridge (rev a2)
00:00.1 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a2)
00:01.0 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.1 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.2 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.3 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.4 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.5 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.6 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:02.0 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:03.0 ISA bridge: NVIDIA Corporation MCP73 LPC Bridge (rev a2)
00:03.1 SMBus: NVIDIA Corporation MCP73 SMBus (rev a1)
00:03.2 RAM memory: NVIDIA Corporation MCP73 Memory Controller (rev a1)
00:03.3 Co-processor: NVIDIA Corporation MCP73 Co-processor (rev a2)
00:03.4 RAM memory: NVIDIA Corporation MCP73 Memory Controller (rev a1)
00:04.0 USB controller: NVIDIA Corporation GeForce 7100/nForce 630i USB (rev a1)
00:04.1 USB controller: NVIDIA Corporation MCP73 [nForce 630i] USB 2.0 Controller (EHCI) (rev a1)
00:0a.0 PCI bridge: NVIDIA Corporation MCP73 PCI Express bridge (rev a1)
00:0b.0 PCI bridge: NVIDIA Corporation MCP73 PCI Express bridge (rev a1)
00:0c.0 PCI bridge: NVIDIA Corporation MCP73 PCI Express bridge (rev a1)
00:0d.0 PCI bridge: NVIDIA Corporation MCP73 PCI Express bridge (rev a1)
00:0e.0 IDE interface: NVIDIA Corporation MCP73 IDE (rev a2)
00:0f.0 Ethernet controller: NVIDIA Corporation MCP73 Ethernet (rev a2)
01:06.0 Multimedia audio controller: C-Media Electronics Inc CMI8738/CMI8768 PCI Audio (rev 10)
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV710 [Radeon HD 4550]
02:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RV710/730 HDMI Audio [Radeon HD 4000 series]
$ lsusb
Bus 001 Device 009: ID 1058:0704 Western Digital Technologies, Inc. Passport External HDD
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 007: ID 15ca:0101 Textech International Ltd. MIDI Interface cable
Bus 002 Device 003: ID 04d9:1603 Holtek Semiconductor, Inc. Keyboard
Bus 002 Device 002: ID 046d:c001 Logitech, Inc. N48/M-BB48 [FirstMouse Plus]
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Before the first power-off attempt:
$ lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/10p, 12M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 4: Dev 7, If 0, Class=Audio, Driver=snd-usb-audio, 12M
|__ Port 4: Dev 7, If 1, Class=Audio, Driver=snd-usb-audio, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/10p, 480M
|__ Port 5: Dev 9, If 0, Class=Mass Storage, Driver=usb-storage, 480M
After the first power-off attempt:
$ lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/10p, 12M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 4: Dev 7, If 0, Class=Audio, Driver=snd-usb-audio, 12M
|__ Port 4: Dev 7, If 1, Class=Audio, Driver=snd-usb-audio, 12M
|__ Port 5: Dev 10, If 0, Class=Mass Storage, Driver=usb-storage, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/10p, 480M
Does anyone know how to fix this problem? Is it a device quirk, a driver bug or something?
Last edited by ackalker (2014-03-29 19:21:04)

Just to be sure, I rebooted my system, shut down lightdm from another VT, made sure that really nothing is using the drive, no partitions are mounted, no services that could try to use the drive (except udisks2.service, could this one be the problem? But how am I supposed to use the udisksctl command when the service isn't running?).
Tried the same command again. same result: I needed to run it twice in a row for it to 'take'.
What I find even more fascinating: how can a USB device jump from one USB bus to another like that? I've honestly never seen anything like this before :-)
Last edited by ackalker (2014-03-29 19:35:29)

Is it possible to connect an external USB 2.0 hard drive to a Thunderbolt Display?

Hello,
Is it possible to connect an external USB 2.0 hard drive to a Thunderbolt Display and back up a MacBook Air to the external hard drive using Time Machine?
I intend to connect my MacBook Air to the Thunderbolt Display using a Thunderbolt cable.
I would also like to connect my printer via USB 2.0 to the Thunderbolt Display. Will this also work?
Effectively using the Thunderbolt Display as a USB hub or docking station.
Regards,
Ben

Ok, thanks.
My 1 cable to ThunderBolt Display objective
MacBook Air -> (via 1 x Thunderbolt cable) -> Thunderbolt Display -> (via 1 x USB cable) -> USB 2.0 external hard drive
I would like to know if this configuration is possible and Time Machine will run correctly.
Your 2 cable suggestion (I think)
MacBook Air -> (via 1 x Thunderbolt cable + 1 x USB cable) -> Thunderbolt Display + USB 2.0 external hard drive
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Hard drive not recognized during windows server 2008 setup

hard drive not recognized during windows server 2008 setup

Hi,
Whether the hard disk is recognized in BIOS?
Connect it to another computer to see if it could be recognzied incase the cause is the disk itself. Also please check if it is really a RAID instead of a single hard disk - a single disk should be recognized directly while RAID cannot be recognized until
a suitable driver is installed.
Please remember to mark the replies as answers if they help and un-mark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

External hard drive not recognized... help please.

okay, well here is the story:
my iBook G4 had its stock 30gb hard drive in it and it was running extremely low on space. so i figured i didn't want to carry around an external hard drive, therefore i would buy an internal hard drive an install it. so i purchased a new 2.5" 80gb hard drive and called up the local apple store. they told me that although it was under warranty, that it did not cover hard drive installation. so i looked it up online and found step by step instructions to install the hard drive. so after lots of hard work and many screws, i installed the new hard drive successfully... but i still had this perfect 30gb hard drive. i thought maybe to save a few bucks i could turn it into a usb external hard drive. i found an enclosure for the hard drive and a usb 2.0 cable and plugged it into my ibook. it was recognized and everything. i put some files on the external hard drive and transferred it to another mac. this is where the trouble started. i plugged the hard drive into a PowerMac G4, and it was not recognized... so i tried it on a different mac. this time on a PowerBook G4, but no luck. this issue has been troubling me for a few weeks. but then i tried it on a similar iBook G4... and it was recognized. but i don't know why it was only recognized only on the iBook G4 (not the same iBook G4 it was pulled out of) and no other macs.
does anybody have any ideas what we can do to get this hard drive to be recognized by other macs?
any of even the smallest ideas would be greatly appreciated.
thanks,
tyler
iBook G4 Mac OS X (10.4.3)

I can walk you through formatting the hard drive:
1. Hook it up to an iBook that recognizes it.
2. Go into your Applications folder, then scroll down to Utilities. Open Utilities and scroll down a bit and you should see Disk Utility. Double-click.
3. On the left side you should see your internal hard drive and your external one. Each hard drive will have a sub-catagory with the partition indented.
4. Your external hard drive will probably be the second catagory. Click it.
5. In the center-top you should see the tabs First Aid, Erase, Partition, RAID, and Restore. Click the Erase tab.
6. You should see Volume Format: and then a drop down menu, and Name: and a text box. Type in the name you want the external hard drive to be named.
7. In the drop down menu, select Mac OS Extended (Journaled).
8. Then, simply click Erase, watch the progress and it should be good to go!!
Hope I helped you out. Oh, and it might be the enclosure...and also what OS's? Since it's USB it is probably using a USB Mass Storage driver. Mac-wise, if formatting doesn't help, I would get a FireWire enclosure because FireWire is much faster than just USB 2.0. Oh, thats nother thing...Is the enclosure Hi-Speed USB? If it isn't, I would definitely get a FireWire one...If it is, the PowerMac G4 doesn't have Hi-Speed so you're not taking full advantage..Just some insight
iBook G4 Mac OS X (10.4.3) 512 MB Ram, CD-RW Combo Drive, 40 Gig HD, bought in October of 2005...
Message was edited by: Hilary_Rose

Advanced Format Hard Drive not recognized by HP DV6000 Controller

Hello,
I have an HP DV 6000 laptop (6276 I think, I'm at work can't check) that came preinstalled with a Western Digital 160gb 1.5gb/s 5400 RPM drive (Vista) that failed a couple of weeks ago. So i bought a Western Digital 750 GB WD Black SATA III 7200 RPM 16 MB drive to replace it. I read about people having some problems with Advanced Drive Format hard drives not being recognized by their controller, but also read that depending on the controller and specific Dv6000 model laptop they had-one wouldn't run into problems.
Well sure enough, when attempting to install Windows 7 I received the error that the hard drive was not detected. After researching online I came across an article on WD's site that noted
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My question(s) are.
1)Is the problem that I am trying to install a Sata ||| hard drive on a laptop with a controller that will only recognize SATA | hard drive?
2) Or is the problem that the hard drive is an Advanced Drive Formatted hard drive and I need to buy a hard drive with out that specification?
3) Or Should I buy a SATA controller card as WD suggests on their website and if so will this definitely allow my laptop's controller to recognize the new hard drive and proceed with the installation?
4)Or Should I just return the hard drive and buy a SATA | non Advanced Drive Format hard drive? (question 2 basically)
Thanks for your help!

Hi @jasmine00
Welcome to the HP Support Forums.
I certainly understand your issue with the drive upgrade. Unfortunately it is a bit of the nature of notebooks, the sacrifice of a large amount of upgradeability, in exchange for compactness and portability. Whenever a new technology comes out, older notebooks are never really going to be easy to upgrade, it at all. Normally the unit as a whole is tested with a set list of hardware, and only those items are supported.
That being said there is this document that could be helpful with your problem.
Preparing Advanced Format hard drives for Microsoft Windows installations on HP Business Notebook PC...
And for your reference:
HP Pavilion dv6000 Notebook PC Maintenance and Service Guide
Malygris1
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 Kudos Thumbs Up on the right to say “Thanks” for helping!

External USB Hard Drive not recognized on iMac HELP!!

I am currently using a i5 iMac running Lion 10.7.5
I have recently partitioned a Verbatim USB external hard drive and uploaded all my footage from a wedding. This was done with no problems and the QT videos could be opened from the hard drive.
A few weeks later, the hard drive does not show up in my finder. BUT it is recognized in disk utility. Here is a screen shot;
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Name : Hitachi HTS545032B9A300 Media
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          Media Name :           Hitachi HTS545032B9A300 Media
          Media Type :           Generic
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          USB Serial Number :           091004B3066D
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          Ejectable :           Yes
          Location :           External
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          Partition Number :           0
          S.M.A.R.T. Status :           Not Supported
Can someone give me a step by step on how to get the hard drive working again? It would mean the world to me as this footage is priceless and irreplaceable.
OR can you refer me to someone (Geek Squad? Apple Store?) that might be able to help me out?
Thanks in advance!

The error message invalid b-tree node size indicates that the directory on the disk is corrupt. The way that it can be repaired is to reformat as disk utiltiy says.
It is recommended that the data be backed up first before either of this solution are done.
Since it is not be recognized by the sytem at all it does sound like you can back it up now.
Do you have a backup?
If you don't there is every chance you may lose all your data.
You can check to see if a data recovery service can recover any data for you. If you go that route you are looking at spending $$$$
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I have a small 2.5" external USB hard drive that my intel iMac will not mount or see. My 12" G4 Powerbook sees it fine and it is formatted in Mac OS Extended. My iMac is bootcamped and XP on my iMac sees the drive but not OS X Tiger on the iMac, (wierd) I have Tiger on both my Macs too.
Why does the intel based OS X refuse to see this external 2.5 HD. It sees a 3.5" USB one I have but not the small one. I know it is software.

Hey coby,
Well thanks for the star. Not sure I deserve it.
i then tried connecting the drive to each USB port again, and voila! i have found one it works in. I guess my computer's ports must be a little worn.
Hmm well try looking inside and see if there's some smutz in there, if the contacts are dirty or bent or worn.
i was starting to think i would have to go out and get a USB hub to give it some more power.
Is it powered off the USB? If so that actually might be a good idea since that puts a lot of strain on the connectors. Even if it's self powered it might be a good idea since it would take the strain off an obviously flakey USB.
richard

USB external hard drive not recognized by computer - using WRTSL54GS

Hi, I have my router (WRTSL54GS) set up and seems to be working ok, but the computer does not recognize it in my network. It only recognizes it as a wireless connection. Also, the USB hard drive I have attached to the router is not recognized anywhere on my computer. What am I doing wrong? Any help would be appreciated!

hi - thanks for responding! I have comcast and have their modem. I hooked up the router with my laptop and went through the setup fine. Everything with that works ok. The USB drive is recognized on the web based utility program that you use to set up the router. However, no where on my computer can I find the USB drive or where to even set up that driver. The manual says that my router should be listed as a another computer in my network neighborhood and that I should be able to find the hard drive through that. It is not. Its only listed in my wireless connections. I talked to a rep at linksys for awhile. In the end, they just suggested unplugging it and plugging it back in......that didn't work! Does that help?

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My external Hard Drive is not recognized on start up. I have to unplug it and plug it back in for it to be recognized.
All this since 10.6.8 updated today.
I'm a fool for updating the same day.
This has happened before and I always forget the bugs in the software when it first comes out.

Alright, I'm gonna go ahead and close this thread. I found out the solution to my issue. Turns out it was a problem with a system file I changed right before installing. The error only occurred on a restart... the required 10.6.1 reboot was the first reboot since the change, so thus it looked like the culprit.
If you want a more thorough explanation of my problem (highly HIGHLY doubt it's gonna help you guys out), check this thread --> http://forums.appleinsider.com/showpost.php?p=1480362&postcount=8
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Lacie 250GB External Hard Drive NOT RECOGNIZED

HELP! My Lacie External HD that I've had for several years and holds a lot of my files is no longer being recognized on my MacBOok Pro. It used to recognize it instantly when I plugged the USB cable to the USB Port - now, nothing. The Lacie light is on, but my laptop isn't reading it at all. What's going on??? I did a disk utility - it's not showing up there at all either. Is it due to a software update? Don't get me started on losing out on using my entire Dreamweaver/Flash Studio MX 2004...
ALSO, I notice my iPhone is not being recognized in iPhoto anymore either. It is recognized in iTunes. And yes i've heard many folks say email photos should be removed, which i have done so and still nothing!
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Are other USB devices working normally, Eric?
If so, the most likely cause is that either the bridge or the drive itself in your external enclosure has failed (assuming you have tried a different cable)
No, it is most unlikely to be due to a software update. With an old external drive like yours the most likely explanation is that it has simply failed. If it is the bridge, rather than the hard drive itself, that has died you may be able to remove the HD from the LaCie enclosure, put it in a different enclosure, and recover your stuff. In some cases, too, a drive light will illuminate when the drive is connected to the computer, even if the power supply to the drive itself is faulty. You might want to contact LaCie to see if they have any advice to offer about such situations.
Have you tried the drive on another Mac or another drive on this Mac? THis would immediately narrow down the location of the problem, of course.
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Message was edited by: Rod Hagen

Help needed - External mobile hard drive not recognized by my iMac

Hi, i received a Freecom Mobile Drive XXS 250 GB USB 2.0 today, after plugging it into my iMac, i am finding that nothing is showing up, and it isn't being recognized at all.
I've tried connecting it via all the USB ports, i have tried connecting it and disconnecting other cables (like speaker + printer cables) and it's not working. I'm not all that computer literate, but after scouring the internet for hours i understand the problem could be that my USB ports are 1.1 and a bus powered hard drive might not get the sufficient power from them?
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Very puzzled, and am out of ideas on how to get this to work (need to transfer files quite urgently - want to upload some new software and don't want to risk losing the files on my internal hard drive, as my computer is getting about slow and unreliable also have the problem of my cd burner now being defunct for some reason, but thats unrelated to this hopefully)
Has anyone got any ideas on how i could get this to show up on my computer? Any info will be much appreciated!
Regards, coby x

Hey coby,
Well thanks for the star. Not sure I deserve it.
i then tried connecting the drive to each USB port again, and voila! i have found one it works in. I guess my computer's ports must be a little worn.
Hmm well try looking inside and see if there's some smutz in there, if the contacts are dirty or bent or worn.
i was starting to think i would have to go out and get a USB hub to give it some more power.
Is it powered off the USB? If so that actually might be a good idea since that puts a lot of strain on the connectors. Even if it's self powered it might be a good idea since it would take the strain off an obviously flakey USB.
richard

Toshiba External Hard Drive not recognized by computer. Please help!

I was wondering if anyone could help me. I have an external hard drive and it will not show up in "My computer" when I plug it in. I have tried other USB drives and other computers. I am starting to think it is a hardware issue but I don't want to lose hope. The blue light is coming on when you plug it in but it doesn't blink and there is no noise whatsoever. Is there anything I can do to fix this issue so that I can recover the information on it? Thanks in advance for any help. It is greatly appreciated.
Additional information: I'm not sure how old this thing is but the model number is HDDR160E03X.

Same problem: I can't see my Toshiba PH3100U-EXB (Gen 2) external hard drive when I plug it in. After awhile I get this error message (see attachment): USB Device Not Recognized. One of the USB devices attached to this computer has malfunctioned, and Windows does not recognize it. FOr assistance in solving this problem, click this message."
When I click it, I get a list of USB ports and devices, with Unknown Device in bold face. No real information there.
Yes, I ran Disk Management and the Toshiba did not show up when I plugged it in and hit Refresh.
Does it make a difference that the last time I used the external hard drive, we were in Windows XP and now we're in Windows 7?
Please help! It's not just the backing up I'm worried about...it's being able to retrieve files later!
Thanks!
Attachments:
USB-NotRecognized.jpg ‏28 KB

External hard drives not recognized by imac

I am a new Mac user and have been having lots of trouble getting my external hard drives to mount. I have a simpletech and a seagate external hard drive both NFTS formatted neither of which is recognized by my iMac. They don't show up on disk utility or system profiier under USB ports. They both work on my PC laptop and a friends iMac (OS 10.6.4) just fine. I have a card reader and flash drive that work perfectly on my iMac. Apple support orginally thought it might be the logic board so they replaced it. The new one is having the exact same problem. Does anyone have any idea what could possibly be the problem?? This is driving me insane.

I'm having exactly the same problem with a new iMac purchased one week ago. I have two Maxtor drives and one WD, all firewire 400 drives, all of which mount briefly and then unmount and will not mount again. I am not new to Macs. The drives work fine on the older PowerPC Mac running 10.4.11. These drives contain my backups and aren't recognized by the new iMac. I cannot believe that 3 external drives are all going into failure mode at the same time since they were all purchased at different times and only used as backup drives, so they weren't on all of the time. Is there an incompatibility between 800 and 400?? I'm using a LaCie 800 to 400 firewire cable. Suggestions??

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