External drive unmounted improperly

AS part of the Hard Drive Replacement Program for my iMac, I was restoring iMovie events from external disk (iomega usb 1 TB drive), the application froze and the external drive was unmounted improperly and now I cannot remount. In the past, I had a unix guru perfrom a command to unmount and then remount and it worked. I have tried unsuccessfully to recreate. Can you help?
iMac 27" Intel, OSX 10.6.8

for log file
07:03:56 filesystems have been refreshed.
07:03:56   created filesystem, id = /System/Library/Filesystems/afpfs.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/cd9660.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/cddafs.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/exfat.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/ftp.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/hfs.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/msdos.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/nfs.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/nofs.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/ntfs.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/smbfs.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/udf.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/ufs.fs/.
07:03:56   created filesystem, id = /System/Library/Filesystems/webdav.fs/.
07:03:56
07:03:56 iokit [0] -> diskarbitrationd [220]
07:03:56   created disk, id = /dev/disk0s2.
07:03:56   created disk, id = /dev/disk0s1.
07:03:56   created disk, id = /dev/disk0.
07:03:56   created disk, id = /dev/disk1s3.
07:03:56   created disk, id = /dev/disk1s2.
07:03:56   created disk, id = /dev/disk1s1.
07:03:56   created disk, id = /dev/disk1.
07:03:56
07:03:56 diskarbitrationd [220] -> diskarbitrationd [220]
07:03:56   probed disk, id = /dev/disk1s1, with hfs, ongoing.
07:03:56   probed disk, id = /dev/disk0s2, with hfs, ongoing.
07:03:56   probed disk, id = /dev/disk1s1, with hfs, success.
07:03:56   probed disk, id = /dev/disk1s2, with hfs, ongoing.
07:03:56   probed disk, id = /dev/disk1s2, with hfs, success.
07:03:56   probed disk, id = /dev/disk1s3, with msdos, ongoing.
07:03:56   probed disk, id = /dev/disk0s2, with hfs, success.
07:03:56   probed disk, id = /dev/disk1s3, with msdos, failure.
07:03:56 unable to probe /dev/disk1s3 (status code 0xFFFFFFFC).
07:03:56   probed disk, id = /dev/disk1s3, no match.

Similar Messages

External Drive UNMOUNTING On Its Own...

Hello.
I have a quite-brand new Iomega External Drive FireWire 800 2TB, bought recently to replace my old failed drive, to be a Time Machine Drive for my iMac.
For the past few days I have observed something very very strange: This TM Drive will for no reason, unmount itself from the Desktop; Sometimes I will be at the computer and that usual warning window message about not unmounting your external drive properly will appear. But sometimes when I get back to my iMac, the ext drive has already unmounted, not sure for how long since the icon is not there anymore.
I just have to turn off and on the drive again to get it mounted.
Before this strange thing, there was a couple of times when TM failed to back up, but it was nothing serious, I just back up again and it is fine. There was once prior to this, that I re-format the drive again (GUID partition) and TM all over again.
I ran Disk Utilities and it says the drive is OK and need no repairs.
So what went wrong here? I have doubts that the drive is faulty because I just got it recently as a new replacement to a previous dead drive. Could it be the iMac itself? The OS? Or the physical FW800 port itself?
Need some advice and help, thanks and cheers

Over the last few days, I have noticed this behaviour (external drive unmounting itself), but I have a 2TB Western Digital USB2 My Book Mac Edition drive that has been working fine with Apple's Backup program since I bought the drive exactly one month ago. The Backup files have now half-filled the drive, and when Backup is attempting to save a new file the drive unmounts and the backup fails. Hers is the backup log from Console for the last couple of days (Cassini is the name of the WD external drive):
2010-11-18 11:54:05.080 Backup[22672:8537] debug: unable to test mount disk image {
"image-components" = (
"/Volumes/Cassini/Backups/Phobos - 2010.11.18-00.30.22.847.backXX/Contents/Contents/Backup.sparseimage"
"shadow-file" = "(null)";
"system-entities" = "(null)";
2010-11-18 11:54:05.107 Backup[22672:8b03] unable to gzip /Volumes/Cassini/Backups/Phobos - 2010.11.18-00.30.22.847.backXX/Contents/backup.log: file does not exist
2010-11-19 08:42:53.803 Backup[22672:bb9f] debug: unable to rename disk image {
"image-components" = (
"/Volumes/Cassini/Backups/Phobos - 2010.11.19-07.36.08.399.backXX/Contents/Contents/311805478.972355.sparseimage"
"shadow-file" = "(null)";
"system-entities" = "(null)";
2010-11-19 08:42:53.848 Backup[22672:9e3f] unable to gzip /Volumes/Cassini/Backups/Phobos - 2010.11.19-07.36.08.399.backXX/Contents/backup.log: file does not exist

External drive unmounting periodically

Hi all,
I've been using an external drive for time machine and cloning of my imac hard drive (each on their own partition). This setup has been working flawlessly for the past 6-7 months.
Just recently TM backups have failed to run and it appears that the external disk is shutting down or unmounted or something (the drive icons on the desktop disappear anyway).
So far if I unplug the power cord or the FW800 cord to the drive and re-insert the imac promptly sees the drive again and all is well.
The first time this happened I just put it down to bad luck or power spike or something, but for the last week or two the drive is disappearing in a day or two. I leave my mac on pretty much 24/7.
Any ideas ? I've also pinged the drive manufacturer WD too.
Not sure if its significant but I have an apogee duet daisy chained off the FW800 system as well, but thats also been there for a few months.
Thanks

Related to the other reply, I had a somewhat similar issue with two Firewire drives daisy-chained together to my iMac. It turned out to be because the first drive in the chain does not pass Firewire signals between its ports when it is powered down. (Some do, some don't.) As long as the first drive was powered up, the second drive was fine, but if the first powered down, I got a warning saying the second was unmounted incorrectly.
Because the first drive has an automatic power down on computer sleep feature, & it takes about 10 seconds after the Mac wakes for it to decide to power back up, I would sometimes see this happen just by sleeping & waking the Mac, depending on how quickly the OS tried to access the second drive.
I don't know if this applies to the devices on your Firewire chain but it is something to check.

External Drive Unmounting?

I have 2 G-Drives daisy chained via fire wire 800 to my iMac. I mac set set to never sleep.
My external drive is set to wake for access. The problem is over night my iMac losses the
external g-drive. Sometimes it looses both other times it drops the second one in the chain.
Now I can leave the drives to never sleep but rather not. Any suggestions as what is causing this problem?

I have this exact same problem. But with respect to the helpful advice above, I don't think this is related to a bad SATA bridge. (At least, in my case). The reason I think this is because:
This problem only occurs when I connect the external drive to my iMac (late 2103, 3.4 Ghz CPU, Fusion drive, etc)
Everything works perfectly fine if I connect to a USB 2.0 port on my older Macbook pro.
Everything works perfectly fine if I connect to my Windows 7 laptop using USB-3.
I am pretty sure this is related to the iMac hardware. Some things I read suggested the iMac might not have enough power being supplied to the external drive. (Even though the drive enclosure has its own power supply)
The drive manufacturer suggesed I connect the device using a powered USB hub. That would make sense in a way, although I don't want to have to buy a powered USB-3 hub just to connect a single external hard drive!
The only other devices I have connected via USB are my apple keyboard.
Does anybody else have any other thoughts?
I am using OS 10.9.0 (Mavericks), which is currently the most recent version of OS X.

External drive unmountable & invisible after sleep (osx 10.8.1)

Hello,
yesterday evening, the lid of my mbp (retina, medio 2012) was closed while it was displaying the screensaver, with an external USB disk plugged in.
After I opened the lid and logged back in, I saw a dialog mentioning that the disk was removed without being properly unmounted.
Since then. I have not only been able to mount it; but it doesn't show up at all.
Not in the finder, not in Disk Utility, not in the Terminal under /Volumes or under /dev/...
I tried the following, so far without any result:
restarting the Finder
rebooting the machine
resetting the pram & nvram
trying the disk on another mac
using either one of the MBP's two USB slots
I have used this disk in this enclosure to store my photo's and music on, until yesterday without any problems. The only thing that I wondered about was that it did not seem a lot faster than I was used to with USB 2 - but that wasn't really an issue.
Further details:
The disk is a 2.5 inch 700 GB disk in a USB 3.0 enclosure. It's formatted as Mac OS Extended (Journaled).
The disk has been used only a few months without any prior problems.
The enclosure is a König CMP-MOBSTOR96, it's about a month old.
The disk has run fine until now without using an additional power supply. There is, however, a 5 volt input on the enclosure.
The enclosure is connected to the MBP via the USB 3.0 cable that came with the enclosure.
I looked in the Console messages, and found that there were a couple of messages apparently related to this issue:
04-09-12 13:42:55,000 kernel[0]: USBF:
2540.458
[0xffffff802ed5ce00] The IOUSBFamily is having trouble enumerating a USB device that has been plugged in. It will keep retrying. (Port 2 of Hub at 0x14000000)
04-09-12 13:42:59,000 kernel[0]: USBF:
2544.946
[0xffffff802ed5ce00] The IOUSBFamily was not able to enumerate a device.
04-09-12 13:43:01,000 kernel[0]: USBF:
2546.268
[0xffffff802ed5ce00] The IOUSBFamily is having trouble enumerating a USB device that has been plugged in. It will keep retrying. (Port 2 of Hub at 0x14000000)
04-09-12 13:43:05,000 kernel[0]: USBF:
2551.148
[0xffffff802ed5ce00] The IOUSBFamily was not able to enumerate a device.
04-09-12 13:43:07,000 kernel[0]: USBF:
2552.470
[0xffffff802ed5ce00] The IOUSBFamily is having trouble enumerating a USB device that has been plugged in. It will keep retrying. (Port 2 of Hub at 0x14000000)
04-09-12 13:43:08,000 kernel[0]: USBF:
2553.790
[0xffffff802ed5ce00] The IOUSBFamily gave up enumerating a USB device after 10 retries. (Port 2 of Hub at 0x14000000)
04-09-12 13:43:08,000 kernel[0]: USBF:
2553.790
[0xffffff802ed5ce00] The IOUSBFamily was not able to enumerate a device.
I found some discussions googling for these messages that seemed to suggest that the cause of the problem is either the cable, insufficient power available to the drive, or failure of the enclosure.
But because this issue happened directly after the "disk not unmounted properly" warning message that followed the closing and opening of the MBP lid, it would be very unlikely that the enclosure or cable would have failed at exactly the same time.
I can (and will) get another enclosure and try it with that, but I was wondering if anyone had any other suggestions that I could look into? It is in any case a bit awkward that problems if this caliber arise after someone merely shuts the lid of the computer causing it to sleep. Also. it was in all likelyhood not writing to the disk at that time.
Thanks in advance!

update
I had kept the electronics part (with the SATA and USB connectors) of a damaged USB 2.0 enclosure. Using that on the above drive DOES work. Also reversely, putting another (known working) drive in the enclosure also fails to show up on the MBP.
Apparently, either the enclosure or the USB cable is broken. That's not strange in itself. But what puzzles me a lot is that it broke at the exact time that the lid of the MBP was closed (for a few minutes) and opened again, causing the "disk not unmounted properly" warning.
I'd really like to know if there is any imaginable way in which the one can have caused the other.
Of course, it is also possible that it is not truly broken but that it somehow, suddenly found the power supply through the USB cable insufficient. Which would be even weirder.
The good thing is that my data and disk are fine. Replacing the enclosure isn't a big deal. But I am hugely confused.

Western Digital External Drive unmounts when USB used

I have a Western Digital 1TB My Book Studio edition external HDD. Its been unmounting recently without warning. I fianlly narrowed it down to when I plug or unplug a USB device such as a headset.
The drive is running in FW as I dont have any spare USB ports. WD are now blaming the computer. After reading other issues people have had with WD I dont believe them. I'm about to install 10.5.8 but I doubt this will fix it, also the HDD has the latest firmware.
Has anyone else had this sort of problem or have any suggestions?

I have a Western Digital 500 GB My Book that mysteriously mounts or doesn't mount about 50% of the time. Am using it in FW, though I've also tried USB with no change in behavior.
The drive gets fiercely hot - I suspect this might be contributing to the bad behavior of the drive. If I check the System Profiler when the drive doesn't mount, it is showing in the System Profiler - but doesn't appear on my desktop.
Out-of-warrantee support is $50 - or I can throw it out and buy a different brand for about $100! Guess which one I will choose!

Repairing external drive when improperly dismounted

not sure if anything can be done. i screwed up- i unplugged the drive while the computer was restarting, to plug it into a more secure power source (through battery backup). anyhow, i know i should have unmounted it first and i was stupid- it was a heat of the moment while crawling around under my desk kinda thing. when i rebooted my comp, disk utility keeps telling me that
"Volume check failed.
Error: The underlying task reported failure on exit (-9972)
1 volume checked
0 HFS volumes verified
1 volume failed verification"
it won't repair the disk- gives me a similar message. tried running cocktial, but the disk isn't showing up to do anything with.
is there any program that will enable me to save some of the data on this extrenal? it's a 500 gb firewire lacie drive. i was thinking of reformatting it anyhow, because it was stuttering some while i was working on a file on it, but wanted to get the stuff off first. fortunately, i have only had it for about a week (it's about a yr old, and worked fine for the person i boughtit from), and don't have anything except a small amount of stuff that isn't somewhere else on it. but, it's stuff i really didn't want to lose.
so, is my only option going to be reformatting, or is there some software that will force it to mount long enough for me to get the data off?
banging head on wall, vowing to be better about backing up....
thanks for any help!

wanted to let you know that disk repair was able to see the files, but couldn't rebuild the disk. data rescue II (which was recommended by the lacie site) was able to pull the files off. it took 3+ days to run the thorough scan before i could do that, though!! so i got my files, and reformatted the disk. copying a bunch of stuff to backup to it, and will really test it out before i trust it completely again. thanks for your help!

(Big) iPhoto Library opening empty from external drive

I need help! I have a new 2014 MacBook running Yosemite, as well as an older MacBookPro. I copied my large iPhoto Library from old laptop (labeled old library "iPhoto Pics 2008-2014", or similar) onto an external drive so that I could access all my photos on this new laptop in iPhoto. I have been holding the "option" key and then opening iPhoto & choosing this 2008-2014 Library to open, and it has been working great. All my 6 yrs worth of pictures immediately populate iPhoto just like it did on my old laptop. HOWEVER, my external drive was accidentally unplugged yesterday without properly "ejecting" it, and it gave me a warning/error message saying something like "your external drive was improperly disconnected". The next time I went to open iPhoto, choosing my 2008-2014 library, it said (something along these lines...) that I had to update the format of the library I was trying to open and it might take a few hours. I had received this message (or similar one) the 1st time I opened this library in my new laptop iPhoto app and so I said yes, for it to fix it. However, it didn't seem to do it properly this time and ended up closing itself. When I tried to open it again, it said some other errors needed to be fixed and I said yes again. Sorry, these details are a bit fuzzy about what went wrong & what messages I got...I just know something didn't seem right as my laptop wouldn't let me close iPhoto and I ended up having to do a force quit to shut down my laptop and reboot.
So now when I rebooted, and I click "option" and open iPhoto, I am able to choose my normal 2008-2014 Library, but it opens with the basic "To get started with iPhoto, do 1 of the following 3 things...", with NO PHOTOS or VIDEOS showing up at all in events, places, albums, etc. It looks just like a brand new Library. However, when I look in Finder and find my 2008-2014 iPhoto Library file, it says the size of it is 171.72 GB, which I think is large and would indicate photos are still in there? These are ALL My photos from the last 6 years. I have most of them still saved on my old laptop (everything before getting my new laptop Nov 20th), just don't have pics I've downloaded to that Library on the external drive between Nov 20th and now. Can anyone help me figure out why iPhoto is opening up an empty library when it should have 6 yrs wroth of pics in it? Did I accidentally erase all the photos in my Library on my external drive??? Thanks in advance for your help/thoughts.

Thanks guys. I did what you said and am about to choose option #4. I cannot really back up this drive before starting rebuild as I don't have a backup of this library exactly, but it is a copy of my entire iLibrary off my old laptop, which I copied over on Nov 20th, so I should have a complete copy of this Library though 11/20 date on my old laptop. I will just potentially lose any photos I've taken and downloaded to external drive since then (luckily not many or any since I haven't downloaded my SLR camera since Dec 5th, so all pics are still on my camera). One last question...is it worth doing the rebuild, or would be be safer (long term...this external library on this drive will be my primary source of ALL my 2008-2014 photos) to just copy over my original library again from my old laptop to this drive?
One additional question though...I just came back to my computer after being away from it for 30 minutes, and again got the "you improperly disconnected your external drive" message. However, my drive is still plugged in and I did not touch it!! So it is disconnecting itself somehow. Any advice on why it's doing this or how to get it to stop? Is it because my computer went to "sleep" or something? Should I not leave my external drive plugged in? Seems like a pain if that is the case as I need to access these pics on my drive often and don't want to be constantly plugging in and then ejecting my drive all the time to keep it safe.

My second internal drive ejects improperly

I installed an optical drive when I purchased my iMac in June 2012. When my iMac falls asleep the otical drive ejects and I have to restart to remount it since disk doctor can't see it. Does anyone know why this is happening and how to solve it?

Hello babowa,
I misspoke, I installed a 2nd internal hard drive, a Fusion 2 TB drive. It "ejects improperly" when the iMac is put to sleep. I've set up energy preferences to either put the hard drive to sleep whenever possible and have also checked that option off with the same results. I create aliases on the side bar for easy access to folders on that drive that disappear when this happens and I have to keep recreating them. I installed the internal drive to avoid the issue of external drives ejecting improperly which forces me to restart my machine or the ext. drive. I also wanted to take advantage of the speed gain from the internal connection. I can't find any info with anyone else having this problem. The Fusion drive is partitioned into 3 volumes. I'm going to reformat it into 1 and see if that makes a difference.
Thanks for your response, although it wasn't helpful.

External hard drives get improperly unmounted

I recently upgraded to Mavericks (clean install) on my mid 2011 MacMini. I have an external hard drive connected via USB3 to eSATA cable. I leave the computer on around the clock as iTunes serves my AppleTV with it's music and videos.
I've repeatedly come back to my computer to find a message stating that my hard drive had been "improperly unmounted" and when I plug the drive back in it won't mount. Disk Utility reports that there are invalid b-tree nodes and the disc can't be repaired. I manage to get the disc fixed using DiskWarrior 4.4 (version 4.1.1 couldn't fix it).
I've read that it's an issue with the energy saver program, so I've turned that all off so the computer does not go to sleep and the drives do not get put to sleep whenever possible. And the hard drive is still getting booted off.
What is going on? I've taken to removing my drives when the computer is not in use, but that's usually when I run my time machine backups, so now those aren't getting done.
What's the solution?

Hello Ari,
USB3 is prone to interference from Wifi & Blutooth for one thing.
Another... are the external drive(s) ıus powered or do they have their own AC power?
Can happen on earler one's also, but...
See if it's related to this...
The 2012 macs (and later apparently) not waking normally from sleep after hours being in sleep. (noted here ...
http://www.xlr8yourmac.com/archives/feb13/022813.html#2012macswontwake
"Why 2012 iMac/2012 Mac Mini won't Wake After Hours of Sleep (Hibernates/Powers Off)")
The sleepimage file still reappears even if never slept. Delete it (hibernate off, etc) - within minutes its back.
A note on that here - http://www.xlr8yourmac.com/feedback/Chameleon_SSD_Optimizer.html
About iMac sleep...
http://forums.macrumors.com/showthread.php?t=1529750
Try this: "sudo pmset autopoweroff 0" and "sudo pmset standby 0"
http://xlr8yourmac.com/archives/sep13/091313.html#10.8.5SleepEjectTip

How can I transfer files from one external HD (WD My Passport) to another external HD (Seagate Backup Plus)? WD drive was improperly ejected and Finder no longer recognizes it. Tried fixing with Disk Utility but failed.

How can I transfer files from one external HD (WD My Passport 2T) to another external HD (Seagate Backup Plus 2T)? WD drive was improperly ejected (although we did tell it to eject) and now Finder no longer recognizes it. Using MacBook Pro and I just upgraded to Yosemite before this happened. Was told at Apple Store to use Disk Utility to repartition, but it failed. It says to backup files and restore. But how do I backup files? Or would appreciate any other suggestions to repair drive.

You may drag & drop between external hds.
Should you run into trouble.
Take the exernal drive appart. Take out the harddrive. Try reading the data via a usb adapter. Put a household finan on the hd.
http://www.cablewholesale.com/products/usb-firewire/usb-2.0-products/product-40u 2-01000.php?utm_source=Nextag&utm_medium=cpc&zmam=54972865&zmas=1&zmac=4&zmap=4 4 77

How to recover files off unmountable seagate external drive

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I did try Disk Utility Repair disk command, but when I ran it this is the report I received:
2013-03-07 17:02:52 -0500: Verify and Repair volume “disk1s3”
2013-03-07 17:02:52 -0500: Starting repair tool:
2013-03-07 17:02:52 -0500: Checking file system2013-03-07 17:02:52 -0500: Checking Journaled HFS Plus volume.
2013-03-07 17:02:52 -0500: Invalid node structure
2013-03-07 17:02:52 -0500: Invalid B-tree node size
2013-03-07 17:02:52 -0500: Invalid node structure
2013-03-07 17:02:52 -0500: Invalid B-tree node size
2013-03-07 17:02:52 -0500: The volume could not be verified completely.
2013-03-07 17:02:52 -0500: Volume repair complete.
2013-03-07 17:02:52 -0500: Updating boot support partitions for the volume as required.2013-03-07 17:02:52 -0500: Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
Disk Utility stopped repairing “disk1s3”: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
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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?
2. Can I format it without mounting it. I don't care if I lose anything as it is all time machine backup files only
3. Do I need to format it on my windows PC and then reformat it again on a Mac!?
Help I am at my wit's end!!
Thanks
RZ

Disk Utility - Format, Erase, or Reformat a Drive

Mavericks and unmounting external drive issues upon sleep

Greetings fellow Mavericks users,
I'm hoping someone here can provide some insight as to how to correct the issue I'm experiencing.
Little background:
I was using 10.6.8 for years on a 2008 Mac Pro. I saw no reason to update the OS until I recently acquired a USB 3.0 PCI card and an external drive. In order to use my new hardware, I had no choice but to upgrade to a new version of OSX. Rather than spend money, I took advantage of the free 10.9.2 upgrade available for my machine. The upgrade went surprisingly well with no major hiccups or problems encountered. Yes, a few apps and programs I had running prior to the upgrade were no longer compatible but in the grand scheme of things, my Mac Pro was still alive and kicking along with my most important programs and data. In fact, the upgrade to 10.9.2 fixed a sleep issue I had with 10.6.8 which required the use of an app called PleaseSleep. I don't need that app anymore as the machine goes to sleep and wakes up fine.
Now, on to my dilemma. Prior to the upgrade, I was using an external USB 2.0 drive to house media that I'd share between multiple network devices around the house via SMB (AFP stinks in this regard, hence my refusal to use it); i.e. BoxeeBox. I had run out of space on the USB2 drive hence the need to move everything to my new external USB3 drive that's connected to an internal USB3 PCI controller. The first problem I ran into was that Mavericks now uses Apple's own iteration of Samba (SMB2). After a bit of head scratching and research, I used an application called SMBUp as a replacement to Apple's SMB implementation. That's one problem solved. The next thing that I kept running into was that whenever the machine would sleep then wake up again, I'd get an annoying "Disk was not properly ejected" error message. After more head scratching and research, I've discovered that this appears to be a bug in OSX and how the OS interfaces with 3rd party USB controllers. Fine. I purchased a small app called Jettison which for all intents and purposes unmounts any external drives automatically before allowing the system to sleep. This is where my long-winded (apologies) description above starts to come into play. Now that I have the SMB issue figured out and am using Jettison to eject this USB3 drive when the machine sleeps, I've discovered that I'll still get the "Disk did not properly eject" error message despite Jettison IF there are users connected to the USB3 media drive. Is there a work around this where I can either get Jettison or Mavericks to kill the network connection to the share drive before it's unmounted prior to the machine sleeping?
TL:DR?
Using Jettison with Mavericks, I'm still getting "Disk did not eject properly" when waking the machine from sleep mode. Any way to fix this?
Thanks in advance for any help/suggestions provided.

I had the same problem with Time Machine and solved it by enabling "Enable Power Nap" in Energy Saver:
System Preferences...
Energy Saver
Restore Defaults
Check "Enable Power Nap: While sleeping, your Mac can back up using Time Machine and periodically check for new email, calendar, and other iCloud updates."
2013 21.5 iMac
OSX Mavericks
Seagate 1 TB slim USB 3.0 (power is drawn from USB port), formatted to Mac Journaling File System

My external drive is always unmounted?

Hi. I have a 2TB external drive that I have been using for two years, without ever having any problems with it - until now.
Everytime I plug it in my Macbook Air, it doesn't show up my desktop, and when I go to Disk Utility it says that the disk is unmounted. Then I usually have to verify the disk once, and repair it twice to get it to show up on the desktop and to work properly, but if I eject it and plug it back in, the same thing happens again.
When I plug it in a Windows computer, it shows up immediately, without any problems - however, the last time I did this, a 1TB folder full of movies and tv shows was deleted from the drive. Also - the external drive is in an exfat format.
Does anyone know anything that I could do?

Finder -> Preferences -> General -> Show these items on desktop -> External disks

External drive unmounted improperly

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