Extl Drive : No longer mounting

I use my Lacie Firewire to backup my system. It is bootable and recently no longer mounts. It is daisy chain to another External Lacie Burner. I have taken the Drive
to another Mac, to ensure that my firewire connections are OK. I have also removed all peripherals and done a PRAM. Repaired permissions and Diskwarrior.
No joy. Any other suggestions please. Thanks

Could try this, except without doing the hot plugging for Firewire (some debate about whether or not Firewire hot plugging, plugging while a device is on, is harmful or not. Probably not harmful, but just to play it safe.)This helped someone else recently.
I solved such an issue with my firewire 800 drives via shutting down the Mac, pulling all cables (power, usb, audio, etc.), waiting for at least 15 seconds (I waited longer), and putting the power cable and keyboard/mouse cable back in.
Then start the Mac, and when it finished loading the system try again mounting your drive by putting the cable in.
It's an official procedure from Apple, but I can't seem to find the explanation on their side, the name of it escapes me.
http://forums.appleinsider.com/showthread.php?t=86528

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Daisy-Chained External Drive No Longer Mounting

I have two external hard drives daisy-chained (firewire 800) to my iMac. The hard drive directly connected my iMac mounts fine. The daisy-chained hard drive no longer mounts, after mounting perfectly fine for a few months. I've tried restarting, etc with no success. Any help would be appreciated.

moretoexplore wrote:
No, it does not mount directly. I did however try using the other hard drive's power cord and it mounted without problem. But this doesn't fix the problem.. only one drive is mounting. At least it seems I have ruled out a more serious problem with the drive itself. I'm contacting Lacie to get a new power cord. Hopefully, with a new power cord, this will resolve the issue and it isn't some sort of daisy-chain issue.
I think you have solved the problem by elimination.
You can prove that it's the power cord by using the "bad" one on the working drive. If it stops working, it's guaranteed to be the power cord.
I believe that there were some issues with some of the LaCie Power Supplies.
Message was edited by: nerowolfe

Drives no longer mount - Only after restart do they mount

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I seam to be having the same issue. I have a number of Flash cards and a flash card reader, well tow card readers actually. I cant get the cards to mount. I have tried swapping usb cables and card readers. I have tried both readers in all my USB ports (17" Mac Book - 10.5.4). The only way that I can get them to mount is if I plug the cards back into the cam,eras an connect them. I think there is a software glitch somewhere. I don't think its the usb ports as I have tried keyboards and mice connected via these ports with no issue. I don't expect an answer to this, but Grant - if you are still out there - I wanted you to know you weren't alone. I am going to try re-installing the 10.5.4 combi download and see what happens. Oh yes and 'repair permissions' (which I have already done once...) but am beginning to think that this is just a bit like saying a mantra as a way of calming me.
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Hello,
My LaCie 600 GB Hard drive will no longer mount onto my iBook G4. I had this problem about 6 months ago. It was solved by reformatting my whole computer through the installation disks that came with my computer. After I reformatted it, the hard drive was immediately recognized. I don't want to go that route again because I have a lot of programs on there that would take forever to reinstall. I have all of my important info backed up, just not the programs itself.
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Firewire 800 external drive no longer mounting

My firewire 800 external hard drive is no longer mounting on my MBP. It powers up, spins, but has no reaction to being plugged into my computer. I've tried connecting it and the turning it on, and connecting it while it was already turned on. I've tried different cables and different types of adapter cables (fw800 to 400, fw800 to USB, etc.), but there is no communication between my drive and my Mac. Same goes if I connect it to my wife's Macbook, or my iMac at work.
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who makes the drive set up?
OWC for example has a history of bad power supplies that make the drive not accessible (drive spins up but never spins all the way up)
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hi, hopefully someone can help with this -
new macbook pro (couple months old)
i've used the optical drive twice, to burn onto a couple maxell dvd+rw discs - this worked fine.
today, i put one of the discs i'd previously used in, hit "erase" in disk utility ...
since then, the drive won't mount or recognize any blank media ... (the drive just hums for a bit, then nothing)
i tried the erased DVD-RW disc in another mac, it mounted fine - so the problem's not the discs ....
the optical drive seems to mount old data DVD-R's, authored DVDs, and CD's just fine ... but it now won't mount any blank media at all (whether CD-R, DVD-RW, or DVD-R)
weird - it's like erasing a DVD+RW has somehow wiped the drive's ability to mount fresh, blank discs...
is it possible the erase operation busted something in the drive ... maybe that kind of operation uses part of the hardware mechanism that only affects the reading of blank media ? or could this be a software problem?
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here's the spec of the optical drive :
MATSHITA DVD-R UJ-875:
Firmware Revision: DA09
Interconnect: ATAPI
Burn Support: Yes (Apple Shipping Drive)
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -R DL, -RW, +R, +R DL, +RW
Write Strategies: CD-TAO, CD-SAO, DVD-DAO
Media: Insert media and refresh to show available burn speeds

ok, just to add to this -
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External drives no longer mounting on other Mac since Leopard Install

I have recently upgraded my old iMac to a Mac Mini with Leopard, however since using my Iomega 320GB External Hard Disk and also my 2GB Kingston USB Stick on my Mini they no longer mount on my old iMac, it's like Leopard has somehow created a volume on them ensuring they won't mount elsewhere anymore.
I still have lots of files on my old iMac that I need to transfer over to my Mini so this is a problem to me.
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* BUMP *
Anyone experienced similar problems?

External drive no longer mounts or unmounts or formats. Help!

I have a 1TB external Seagate drive which is used to store my time machine backup for an iMac (2010). My time machine is failing as it says there is no backup disk. I ran disk utility. I see it on the external drive on the list below the line on the drive listings. I see the external drive and the time machine volume indented below it. I verified the external disk and it says it is fine. However it will not let me mount the external drive or the time machine partition. I cannot even re-format the disk because it says it cannot be unmounted (which is obvious it it does not let me mount it). It is connecting to the drive because it can see the verify results. I also tried every combination of unplugging power and cables to both the unit and the Mac itself.
Question(s):
1. Is there anyway to remount the external seagate drive?
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Disk Utility - Format, Erase, or Reformat a Drive

External firewire hard drive no longer mounted.

Greetings!
I have a 2 TB Seagate external drive attached to my MacBook Pro (15", late 2008; Mavericks) by Firewire, which has worked without problem until yesterday. Now it is no longer recognized by Finder!
I ran Disk Utility which shows the drive as unmounted.
Any assistance would be greatly appreciated.
Thanks,
Joel

I mean Firewire HD (no idea what a HAD is...)

External drives no longer mounting

I have two external drives connected via Firewire. The Lacie d2 is partitioned in two and it mounts automatically every morning when I start up the computer. The other is a NewerTech with a built-in Firewire/USB hub that I use to clone my iMac using SuperDuper. I only turn it on when I'm going to run SD because it's noisy. I bought a Seagate Barracuda drive and put in in a Macally enclosure for my daughter. I hooked it up via FW and turned it on. It mounted, a window popped up saying it couldn't be read and I clicked the button to Initialize, which opened Disk Utility. I clicked on Partition, then Options and chose the GUID partition. I clicked Partition and it chugged away for about an hour, getting nowhere. I then chose Erase and Zero Out Data. A window came up saying it couldn't be erased because it wasn't configured, and the drive icon disappeared. I turned it off and back on – no icon. I switched from FW to USB – no luck. I restarted with the drive on – no icon. Now neither of my other two drives will mount. They don't show up in Disk Utility or System Preferences > Startup Disk. I would appreciate any explanations of what I've done wrong and how to fix it. Thank you.
Cheers, Peter

Thank you for the information, baltwo. The problem now is that none of my drives mount, so I can't do anything with them. They don't show up on the Desktop, in Disk Utility or in System Preferences > Startup Disk. When I turn on the drive I use with SuperDuper, SD says it can't be found. In System Profiler > Firewire, I get a Warning, in red, Unable to list Firewire devices.
Cheers, Peter
Message was edited by: Pram

Disk drive no longer mounting

Hmm. Last night I took the QT upgrade and somehow during the 'optimization' process after it installed, a whole bunch of the unix files went walking - over a dozen files in the /sbin/ folder, including the mach_init (oh joys!).
Thankfully I have a second system running and I put the damaged HD into an external USB sled and copied the files back into the correct folder.
The system now boots and launches fine but I cannot get it to recognize the disk drive. The drive powers up but doesn't mount. I've run through all the system tricks to get it to do so, but it will not. I have a feeling that there may have been more files that got lost than I could get an accounting of.
Where else would I look to find and copy missing binaries for the disk drive? Not knowing this level of the code so well - I don't relish pecking and poking through everything all day - I don't really know where to hunt.
Much thanks to anyone who can get me on the right path.
Deb.

Outstanding! I'll start with those five.
The first two I've already gone through and matched up files. I was missing a 'mount_cd9660' file - found that by sorting through with a list view.
Houston, the Eagle has landed!
Now that I think of it, earlier on Sunday, I had a glitch while OnyX was running a maintenance and it locked-up. The system recovered, but I think you're right, in that the QT upgrade unmasked the problem.
Beyond that, it's been running rock-solid, and I run DiskWarrior every month or so.. but this is kind of cool, in that I'm getting to see the hierarchy of the unix system.
Thanks!
Deb.

After 10.5.6 Update, external drives no longer mount

For some time, I have been using a Western Digital external drive for my Time Machine back-ups. Sometime after the 10.5.6 upgrade (Dec), When I plugged in the drive I get a "USB Over Current Notice: A USB device is currently drawing too much power. The hub to which it is attached to will be deactivated."
I assumed the drive had failed, so I bought another drive (A Verbatim). It mounted fine, so I formated it to use for my Time Machine back up and it then it immediately refused to mount once it was reformatted. Neither drive will mount, though other USB devices like memory sticks mount fine.
There is a discussion strand about a problem in Time Machine after the 10.5.6 upgrade, however, all the fixes posted assume that the drive will mount and you can then use the Terminal Application to repair a damaged file on the external drive.
I'm stuck. Any advice?

Bradleysp wrote:
For some time, I have been using a Western Digital external drive for my Time Machine back-ups. Sometime after the 10.5.6 upgrade (Dec), When I plugged in the drive I get a "USB Over Current Notice: A USB device is currently drawing too much power. The hub to which it is attached to will be deactivated."
Is the drive attached to a powered hub? Bus-powered drives often cause this problem as they start to fail. Des the drive work if attached to your MBP?
I assumed the drive had failed, so I bought another drive (A Verbatim). It mounted fine, so I formated it to use for my Time Machine back up and it then it immediately refused to mount once it was reformatted. Neither drive will mount, though other USB devices like memory sticks mount fine.
Again, the hub question. If you are using a powered hub perhaps its power supply brick is failing.
There is a discussion strand about a problem in Time Machine after the 10.5.6 upgrade, however, all the fixes posted assume that the drive will mount and you can then use the Terminal Application to repair a damaged file on the external drive.
I'm stuck. Any advice?
One step at a time
Luck-
-DP

Flash drive no longer mounts

As of last night, it always did, but today, I see nothing on the desktop or finder sidebar to indicate the flash drive's mounted. My MBP mounts other flash drives thru the same usb port and mp3 players, just not this one anymore. And I see it on our windows computer. Whasup widat?

Ick. I had that happen with a set of drives last week. In my case it turns out the adapter I was using was bad. In your case there's fewer options (since you say other drives work) - it's either a bad connection or a bad drive. As I said, Windows will detect drives if they are just plugged in, even if they aren't functional. Flash drives don't last forever... Do you have a USB extension cord to see if it's just a bad connection?
You can peruse the following but it doesn't sound like one of these issues.
[USB and FireWire Quick Assist|http://support.apple.com/kb/HT1151]
[Common fixes for USB device issues (unrecognized, etc.)|http://www.macfixit.com/article.php?story=20070824012114701]
[What to do if your computer won't recognize a FireWire or USB device|http://support.apple.com/kb/HT1317]

Firewire Drive no longer mounting

Hi, I've been using a Western Digital Firewire External My Book drive for time machine for awhile now, but it suddenly will not mount anymore. I have 2 others that I use for other stuff that still mount fine though.
It won't show up in Disk Utility either. I've tried shutting down my computer completely and unplugging everything and restarting like some said but that didnt work. I've rebuilt permissions also. The light is on on the front of the drive so it seems to be working.
I don't have a copy of disk warrior so I can't try that.
Any help would be appreciated,
thanks!!
Jeff

The only internationally available Firewire hard drive cases I've never had to put a firmware update on or change cables from are from http://www.macsales.com/ You can remove the hard drive from the external case from Western Digital, determine if it is Parallel ATA or SATA hard drive, and get the appropriate firewire hard drive case from http://www.macsales.com/ to read that kind of drive. After which time, it should work great. Other companies seem to require firmware updates from time to time, but not http://www.macsales.com/ Can't explain why.

Firewire external hard drives no longer mount

I had 2 firewire external hard drives connected, not always at the same time and not running all the time. Suddenly they won't mount. I have run System Profiler and it shows "No information Found". The drives themselves mount on my other Mac laptop.
An external DVD writer, when mounted, shows up in profiler though not on the desktop. I have set the finder preferences to -show all mounted drives. System profiler lists all my USB devices. It's just the 2 Firewire hard drives that show no information found. The DVD writer works in either Firewire port.The hard drives are each made by a different manufacturer.
I have re-started with everything off. I have hot swapped.
Help-I need these drives to store photo files and print publications.
Fairview
iMac Mac OS X (10.3.9) G4
iMac Mac OS X (10.3.9) G4

fairview:
The next step is to see if it is directory related and Repair Disk:
Insert Installer disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu (Panther and earlier) or Utilities menu (Tiger) and launch Disk Utility.
Select your HDD (manufacturer ID) in the left panel.
Select First Aid in the Main panel.
(Check S.M.A.R.T Status of HDD at the bottom of right panel, and report if it says anything but Verified)
Click Repair Disk on the bottom right.
If DU reports disk does not need repairs quit DU and restart.
If DU reports errors Repair again and again until DU reports disk is repaired.
If DU reports errors it cannot repair you will need to use a utility like Tech Tool Pro or Disk Warrior
Good luck.
cornelius

Extl Drive : No longer mounting

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