External drives not showing in disk utility

All of a sudden, my mid 2011 iMac has stopped recognizing 2 external hard drives via either FW800 or USB. The drives don't even appear in the Disk Utility. I switched to another account, and the drives still do not appear. Flash cards still work, either via the slot on the side or via an external reader plugged into the same USB port which would not connect to an external hard drive.
How do I sort this out? Thanks.

Hello
try use your 2 HD into other mac ?
try change cable ? check for power cord ?
HTH
Pierre

Similar Messages

External hard drive not showing in disk utility

my samsung external hard drive has always worked with no problem on my mac..
I have just plugged it in to do some work and it will not appear anywhere..
not even in disk utility
i have tried the USB port and it is working fine because i also have a mouse and that worked fine in that port..
PLEASE SOMEONE HELP ME!

Try following tips.
USB and FireWire Quick Assist - Apple Support

External hard drives not showing in disk utility

When I connect a new Eagle/Consus W-Series external hard drive enclosure to my 15" PB, the hard drive doesn't show-up in the left hand pane of the Disk Utility window. The only thing that shows is the drive in the PB. The hard drive in the enclosure is a WD SATA and is connected via USB cable. The same thing happens, or doesn't happen, when I'm connected via ethernet to my G5 2.3GHz Dual Core: when I open Disk Utility on the PB, the drive on the G5 doesn't show. What I'm trying to attempt is to mirror/clone Tiger from my PB onto the new, to me, G5 using SuperDuper.

Hi, Bob. I obviously didn't understand the situation properly, and now that I realize that, I'm afraid I still don't.
When the G5 is connected, via ethernet to my PB, the hard drive does not show-up in the PB's disk utility pane.
The G5 doesn't have a hard drive in it now, is that correct? So why connect it via Ethernet to the Powerbook?
If you're trying to clone the Powerbook's hard drive onto the G5's drive inside the external enclosure, all that needs to be connected is the external enclosure to the Powerbook, via USB cable. The G5 itself isn't involved in that process at all. When the G5's drive is in the enclosure and connected to the Powerbook, does it appear in Disk Utility on the Powerbook? If not, see my previous suggestions, with the exception of my comment about it not working with either computer.
If the SATA hard drive doesn't appear on the Powerbook's desktop or in Disk Utility when it is in the G5 and the computers are properly networked via Ethernet, recheck your sharing settings: the G5's drive must be shared to be visible to the Powerbook. In that mode, you may not be able to clone the Powerbook's drive to the other one, because the drive in the G5 is being used to run the G5. But if the G5's drive is partitioned, you should be able to clone the Powerbook's drive, via Ethernet, to a partition other than the one which contains the OS that's running the G5.
While the hard drive is in the external enclosure, I can hear it spinning, and am assuming that all the connections are working properly.
If the drive spins, you can be sure it's getting power, and that's good. But you can't safely conclude from that that any or all of the data connections are working properly; in fact the evidence suggests the contrary.
In short, there may be not one but two problems at work here: incorrect sharing settings when the two computers are networked, and a bad cable, connection, or enclosure when the drive is connected to the Powerbook via USB.
EDIT: Let me also add that if the only Tiger installer discs you have are the ones that came with the Powerbook, then having copies of that Tiger installation on both of your computers would be a violation of the software license that accompanied those discs, which entitles you to have Tiger installed on only one computer at a time. If that's the case, you should really buy a retail Tiger installer disc to use on the G5.
Message was edited by: eww

Non-formatted External Harddrive not showing in Disk Utility

I have an empty external hard drive that is not formatted. I would like to format this and use for storage of some of my larger files. However, it doesn't show up in Disk Utility, or also doesn't show up when checking off "Show External Drives" in finder preferences. If I have it plugged in to the mac during start up, I only get a grey screen, the mac will not start. I've tried this on my 2010 Macbook Pro and 2012 Macbook Pro, same results. I have to unplug it for the computers to start. Both are running OSx Yosimite. Any suggestions of programs that will format this

Sounds like a broken ext HD. Replace it.
27" i7 iMac (Mid 2011) refurb, OS X Yo (10.10.2), Mavs, ML & SL, G4 450 MP w/10.5 & 9.2.2

Hard drive not showing in Disk Utility?

Recently, I went to install Windows 10 via Bootcamp and set up two partitions (one for OS X, 500gb and one for Windows, 500gb). I accidentally installed Windows onto of the OS X partition and somehow the Windows OS disappeared so I currently have no OS to boot in to. I can run Yosemite off of a USB, but when I go to Internet Recovery or Disk Utility, it only shows this.
Disk Description : Media
Total Capacity : 0 Bytes
Connection Bus : SATA
Write Status : Read/Write
Connection Type : Internal
S.M.A.R.T. Status : Not Supported
Partition Map Scheme : Unformatted
I know the hard drive can't be dead because this is a brand new laptop and it was working just fine before. How can I get the drive fixed?
Instead of buying DiskWarrior since it's $110, can I just buy a new 1TB HDD and put it into the computer? Can I hook up my laptop via Firewire to my iMac and reformat the drive or something?

OGELTHORPE wrote:
Or try and boot the MBP with the OPTION + COMMAND + R keys. The display should show a revolving globe. By following the instructions, this will connect the MBP to the Apple servers and allow you to erase the HDD and reinstall the ORIGINAL OSX.
Ciao.
The problem with this option is that the computer does not recognize that there is any space on the hard drive itself. The hard drive is just labeled as "Media" and has 0 bytes available. I tried using GUID partitions but Disk Utility says the drive is too small.

Hard Drive not showing in Disk Utility (but showing fine on PC)

I have been using an 1TB USB powered Hard Drive with my MBP for a year or so.
I got a new 2 TB drive and loaded it and installed the seagate dashboard software.
At that point, it appears something may have happened to my HP and it no longer appears on my Mac or in Disk Utility. It appears to be getting power, and it shows up fine on a Windows PC.
Any thoughts??
This one is really baffling me?
Thanks

One other note
A folder called TheVoumeSettingsFolder now appears on the HP, in case that is causing the issue.
Thanks

My iMac does not see the new Toshiba external drive in Finder or Disk Utility. How can I get it to see the drive?

My iMac does not see the new Toshiba external drive in Finder or Disk Utility. How can I get it to see the drive?

From the menu bar, select
 ▹ System Preferences ▹ Energy Saver ▹ Power Adapter
and uncheck the box labeled Put the hard disk(s) to sleep when possible, if it's checked.
If the drive has more than one interface (USB, FireWire, Thunderbolt, eSATA), try one of the other interfaces.
Check that the data cable is securely inserted at both ends.
Try a different cable.
If you're connecting the drive through a hub, connect it directly to a built-in port on the Mac.
If you're connecting it directly, try a different port.
Disconnect all other devices on the bus, or as many as possible.
Test the drive with another Mac. Test another drive with this Mac.
If the drive is bus-powered, but has an AC adapter, connect the adapter.
Start up in Recovery mode and launch Disk Utility. Is the drive recognized?
Start up in Safe Mode and test.
Reset the NVRAM.
Reset the System Management Controller.
If the drive doesn't work under any of the above conditions, and if another drive does work with the same Mac, then the drive is malfunctioning.

USB External drive not showing in Finder, or on Desktop

I have two USB external drives from the same manufacturer. One is for regular storage, the second is for Time Machine and movies.
The first one shows everywhere, on the desktop, in finder and in Disk Utility.
The second drive shows in Disk Utility only. However, it is functioning fine with Time Machine. So it is mounted. I have tried several repairs, and it reports no fault found. So it is certainly functioning correctly, but a setting or error in the operating system is not allowing it to be viewed in finder, or on the desktop.
Any suggestions.

Correction: Title should be Firewire External drive not showing in Finder, or on Desktop.

External drives not showing on desktop

I have a situation where my external drives are not showing up on my desktop and need additional help on figuring out the problem.
So far I have read the suggestions to Repair permissions in Disk Utility. However, the drives that aren't showing on the desktop are not showing in Disk Utility either.
I tried downloading the 10.4.4 Combo Update but upon trying to install it, I am being told that neither my system drive nor my 2nd, internal drive will accept it (red explaination points on both drive icons).
I tried unplugging all firewire and USB devices and then unplugging AC power. Left computer shut down for 4 hours. No fix.
Tried zapping P-Ram. No fix.
Tried my external drives on a G4 computer at work (running OS 10.3). Worked fine.
Swapped out fire wire cables. Nothing.
Ran Tech Tool pro. Tests confirm that fire wire drivers are working properly. Passed. I know that this test only checks for drivers and not whether the info is being passed through the connectors.
The only thing I didn't try was replacing the battery. However, my clock and all other battery dependent items are working just fine and not showing any spuratic signs of malfunction.
The two external drives I am using are a Western Digital and a one Touch Maxtor. The Maxtors, (so I've read on this thread) have been known to show some signs of inconsistent behavior. However, I've had no issues with it up to this point and I've had it for over two years.
Any help would be appreciated. Thanks to all of you who have already posted some possible fixes. I appreciate it greatly.
Thanks.
Steve
Power Mac, G5 Mac OS X (10.4.10) 2.5 GIGS RAM, Dual processor

DP
Thanks. Are you talking about booting from my external drives?
Yeah, I haven't actually booted from any of my external drives as they do not have any system software on them to boot from.
If you have a good backup procedure, I'd love to hear it as I'm always documenting and using new ways to backup my info.
From here, I plan on going in and running Tech Tool on my two external drives, (now that the computer is regognizing them) to see what I can find out. My guess is that my firewire ports or drivers on the G5 may have gotten a little mixed up when last Thursdays lightning strike cut the power to the neighborhood. However, I do have a battery backup/ surge protection system that's been in place for about a year. It's been working great so the lightning strike may not be the problem. It was a pretty harsh one, though. After looking over the backup system, nothing looks fried or damaged in any way. Still working fine.
As far as not relying on just one drive, I'm heading into town and picking up a third drive that will back up what's on my existing two externals. This will then be kept safely stored away. By the way, what does IMHO mean? I'm a little rusty on my computer accronyms.
Thanks again!
Back to work.
Steve
Power Mac, G5 Mac OS X (10.4.10)
Power Mac, G5 Mac OS X (10.4.6)

TS1338 I have 4 Trojan Horse viruses on my external drive I use for Time Machine. My MacBook Pro hard drive is clean. I have eased the external drive 3 times using Disk Utility and it still has the 4 Trojan Horse viruses. How do I get rid of them. Wayne

I have 4 Trojan Horse viruses on my external drive I use for Time Machine. My MacBook Pro hard drive is clean. I have eased the external drive 3 times using Disk Utility and it still has the 4 Trojan Horse viruses. How do I get rid of them. I am using 10.8.3 Wayne

ksu62 wrote:
The infection names are: classload.jar-719ef6a5.zip
                                          classload.jar-5db452le31.zip
                                          ar3.jar-6ce3b2f-45l483f.zip
                                          classload.jar-lef99412-63bsd3fl.zip
Those look alot like file names and not infection names. I don't find any reference to anything like that on Norton or VirusTotal. Since you said these were Trojans, I would expect to see "Trojan" as part of the infection name.
".jar" files are executable Java applets. The random alpha-numerics would seem to indicate a cache file, likely from a browser with Java enabled. And we all know what ".zip" means.
Worst case is that you had Java enabled in a browser and were infected by one of the late variants of the Flashback Trojan over a year ago or one of a couple of other attacks using the same vulnerability but targetted against a small number of political sympathizers. Much more probable is that thes were Windows only Trojans. Hopefully you have a fully up-to-date OS X, including Java, and have disabled Java in all your browsers by now.

Thunderbolt WD Duo, does not show in Disk Utility

Hi Have imac 27 (late 2012) with 10.8.3 update OSX. Connecting to WD Thunderbolt Duo, the disk does not show in disk Utility, sys log or in any connection to the system. WD utility does not seems it either. Restart does not help. By disk returning to seller, the disk works fine on other comp (with the same cable, with the same power adapter)
Is there any issue known with the thunderbolt ports? Tried both all found on internet, but no resolution, to my issues.
Seems to be my imac hardware or maybee the software (thunderbotl 1.2) update.
Lukas

All thunderbolt port tried, cable exchanged, no change
I have done following procedure , no change
Resetting NVRAM / PRAM
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

Airport extreme hosted hard drive not recognized by Disk Utility

Hi, all. I've had success for a month now hosting a 4T hardrive wirelessly via my Airport Extreme. I use it for Time Machine backups and remote storage. So I'd like to repartition that hardrive via Disk Utlity, however Disk Utility no longer recognizes the 4T hardrive hosted via my Airport Extreme. How can I get my Airport Extreme external drive to show up in Disk Utility so I can format it again?

I'm not sure you're aware but I wanted to let you know that using an external drive connected to the Airport USB port as a Time Machine backup device isn't supported/recommended by Apple. don't be surprised if you think it's working and you go to use it to restore from a crash, and you can't. Just a warning.

External drive not showing up on desktop

I have an external hard drive (2T Newertech ministack). We had a power outage the other day. Even though the drive is on it no longer appears on the desktop. I went to Disk Utility and see if it could be repaired but the drive is not even showing up there. Does this mean the ministack was fried by the outage or is there another way I can save it? And yes, the finder preferences are on for external drives to show up on desktop.

It's not likely it would be fried if it's connected to a UPS because then it would not lose power and crash. Have you tried disconnecting the device from the computer, rebooting the computer, then reconnecting the device?
Since you have another Mac try directly connecting the device to it and using Disk Utility to repair the drive. Then give it a try on the other computer.

External drive not showing in sidebar

I have set my Finder Preferences for the Sidebar to show connected servers and external drives. However, I can not get a mounted external drive to show under Devices in the sidebar. It has appeared previously, but now I can't get it to stick on the sidebar when dragging the external drive from the finder window to the sidebar. Noticed some older posts on the Internet from others experiencing this issue. Is there a fix?
MacBook Pro RD, early 2013, OS 10.8.5, with attached Dell external monitor.

Can you see it in Disk Utility? If so, try the mount command in the top menu bar.
You can also try deleting the Finder .plist.
In Finder hold down the option/alt key while selecting the Go menu item. Select Library. Then go to Preferences/com.apple.finder.plist. Move the .plist to your desktop.
Re-launch Finder by logging out/in and test. If it works okay, delete the plist from the desktop.
If the same, return the .plist to where you got it from, overwriting the newer ones.
If you want to make your user library permanently visible, run the below command in Applications/Terminal.
chflags nohidden ~/Library/
You will need to do that after any updates.

Macbook Pro 2012 HDD not mounting/not showing in disk utility

I opened the macbook to find all apps freezing, nothing would work. So i did a hard shutdown and restarted the machine, and when it booted i just got the flashing folder icon. I re-booted into internet recovery, and went in to Disk Utility and found that the hard drive was not mounting and showing in there. I swapped the hard drive with a spare SSD and it worked fine, so it's not the cable. Also when i boot up, i can hear the hard drive spinning so its not completely dead. I have booted it up as a target disk with the iMac and it still will not appear. There's some photos and other bits that i really want to recover from this drive. Any advice?

Okay, so i have held off going to an Apple store because i wanted to recover the data from the hard drive before repair/replacement. I fitted a 120GB SSD drive which worked fine until today when i opened it up and the same thing occurred. It would seem that it is not the hard drive that had a problem, but perhaps a software issue. I managed to boot up once after the crash and the error report listed a kernel panic as the root of the problem. Here is the full report, which i also got the first time it happened...
Anonymous UUID:       810341CF-8185-F411-7C6C-347DC4B4CDBA
Wed Aug 27 01:24:36 2014
panic(cpu 1 caller 0xffffff80226dc24e): Kernel trap at 0xffffff802267bf83, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0x000000000000003c, CR3: 0x000000004de2c03d, CR4: 0x00000000001606e0
RAX: 0x0000000000000000, RBX: 0x0000000000000000, RCX: 0x00000000cbb09500, RDX: 0x0000000000000821
RSP: 0xffffff8144263ac0, RBP: 0xffffff8144263af0, RSI: 0x0000000000000000, RDI: 0xffffff8022c9f500
R8: 0x0000000000000000, R9: 0x0000000000000000, R10: 0xffffff8022cd1600, R11: 0x0000000000000000
R12: 0xffffff8022c9f500, R13: 0x0000000000000000, R14: 0x0000000000000000, R15: 0x0000000000040000
RFL: 0x0000000000010286, RIP: 0xffffff802267bf83, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0x000000000000003c, Error code: 0x0000000000000000, Fault CPU: 0x1
Backtrace (CPU 1), Frame : Return Address
0xffffff8144263750 : 0xffffff8022622f79
0xffffff81442637d0 : 0xffffff80226dc24e
0xffffff81442639a0 : 0xffffff80226f3746
0xffffff81442639c0 : 0xffffff802267bf83
0xffffff8144263af0 : 0xffffff80226705a1
0xffffff8144263b70 : 0xffffff80226706b0
0xffffff8144263b90 : 0xffffff80226711a0
0xffffff8144263bd0 : 0xffffff8022695c5b
0xffffff8144263c00 : 0xffffff802268f39d
0xffffff8144263c30 : 0xffffff802268e5ec
0xffffff8144263c70 : 0xffffff802267e58c
0xffffff8144263d80 : 0xffffff80226825cf
0xffffff8144263db0 : 0xffffff802263d9e3
0xffffff8144263df0 : 0xffffff80229cec5e
0xffffff8144263e60 : 0xffffff80229e25ed
0xffffff8144263ef0 : 0xffffff80229e2967
0xffffff8144263f30 : 0xffffff8022620b3b
0xffffff8144263f60 : 0xffffff80226dc883
0xffffff8144263f80 : 0xffffff80226f3712
BSD process name corresponding to current thread: xpcd
Mac OS version:
13E28
Kernel version:
Darwin Kernel Version 13.3.0: Tue Jun 3 21:27:35 PDT 2014; root:xnu-2422.110.17~1/RELEASE_X86_64
Kernel UUID: BBFADD17-672B-35A2-9B7F-E4B12213E4B8
Kernel slide:     0x0000000022400000
Kernel text base: 0xffffff8022600000
System model name: MacBookPro9,2 (Mac-6F01561E16C75D06)
System uptime in nanoseconds: 85519367877618
last loaded kext at 85449604909270: com.apple.driver.AppleIntelMCEReporter      104 (addr 0xffffff7fa44d8000, size 49152)
last unloaded kext at 83626591194872: com.apple.driver.AppleIntelMCEReporter    104 (addr 0xffffff7fa44d8000, size 32768)
loaded kexts:
com.apple.driver.AppleIntelMCEReporter 104
com.apple.driver.AudioAUUC      1.60
com.apple.filesystems.autofs    3.0
com.apple.iokit.IOBluetoothSerialManager        4.2.6f1
com.apple.driver.AppleMikeyHIDDriver    124
com.apple.driver.AGPM   100.14.28
com.apple.driver.X86PlatformShim        1.0.0
com.apple.driver.AppleHDA       2.6.3f4
com.apple.driver.AppleUpstreamUserClient        3.5.13
com.apple.driver.AppleMikeyDriver       2.6.3f4
com.apple.driver.AppleThunderboltIP     1.1.2
com.apple.driver.AppleBacklight 170.3.5
com.apple.driver.AppleSMCPDRC   1.0.0
com.apple.driver.AppleSMCLMU    2.0.4d1
com.apple.driver.AppleLPC       1.7.0
com.apple.driver.AppleMCCSControl       1.2.5
com.apple.driver.AppleIntelHD4000Graphics       8.2.8
com.apple.driver.AppleIntelFramebufferCapri     8.2.8
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport     4.2.6f1
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.Dont_Steal_Mac_OS_X   7.0.0
com.apple.driver.AppleHWAccess 1
com.apple.driver.SMCMotionSensor        3.0.4d1
com.apple.driver.AppleUSBTCButtons      240.2
com.apple.driver.AppleIRController      325.7
com.apple.driver.AppleUSBTCKeyboard     240.2
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless     1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeLZVN 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache     35
com.apple.iokit.SCSITaskUserClient      3.6.6
com.apple.driver.XsanFilter     404
com.apple.iokit.IOAHCIBlockStorage      2.6.0
com.apple.driver.AppleFWOHCI    5.0.2
com.apple.driver.AirPort.Brcm4331       700.20.22
com.apple.driver.AppleAHCIPort 3.0.5
com.apple.driver.AppleSDXC      1.5.2
com.apple.iokit.AppleBCM5701Ethernet    3.8.1b2
com.apple.driver.AppleUSBHub    683.4.0
com.apple.driver.AppleUSBEHCI   660.4.0
com.apple.driver.AppleUSBXHCI   683.4.0
com.apple.driver.AppleSmartBatteryManager       161.0.0
com.apple.driver.AppleACPIButtons       2.0
com.apple.driver.AppleRTC       2.0
com.apple.driver.AppleHPET      1.8
com.apple.driver.AppleSMBIOS    2.1
com.apple.driver.AppleACPIEC    2.0
com.apple.driver.AppleAPIC      1.7
com.apple.driver.AppleIntelCPUPowerManagementClient     217.92.1
com.apple.nke.applicationfirewall       153
com.apple.security.quarantine   3
com.apple.driver.AppleIntelCPUPowerManagement   217.92.1
com.apple.kext.triggers 1.0
com.apple.iokit.IOSerialFamily 10.0.7
com.apple.driver.DspFuncLib     2.6.3f4
com.apple.vecLib.kext   1.0.0
com.apple.iokit.IOAudioFamily   1.9.7fc2
com.apple.kext.OSvKernDSPLib    1.14
com.apple.iokit.IOFireWireIP    2.2.6
com.apple.driver.AppleHDAController     2.6.3f4
com.apple.iokit.IOHDAFamily     2.6.3f4
com.apple.driver.AppleSMBusPCI 1.0.12d1
com.apple.driver.AppleBacklightExpert   1.0.4
com.apple.driver.X86PlatformPlugin      1.0.0
com.apple.driver.IOPlatformPluginFamily 5.7.1d6
com.apple.driver.AppleSMBusController   1.0.12d1
com.apple.iokit.IONDRVSupport   2.4.1
com.apple.iokit.IOAcceleratorFamily2    98.22
com.apple.AppleGraphicsDeviceControl    3.6.22
com.apple.iokit.IOBluetoothHostControllerUSBTransport   4.2.6f1
com.apple.iokit.IOSurface       91.1
com.apple.iokit.IOGraphicsFamily        2.4.1
com.apple.iokit.IOBluetoothFamily       4.2.6f1
com.apple.driver.AppleSMC       3.1.8
com.apple.driver.AppleThunderboltDPInAdapter    3.1.7
com.apple.driver.AppleThunderboltDPAdapterFamily        3.1.7
com.apple.driver.AppleThunderboltPCIDownAdapter 1.4.5
com.apple.driver.AppleUSBMultitouch     240.9
com.apple.iokit.IOUSBHIDDriver 660.4.0
com.apple.driver.AppleUSBMergeNub       650.4.0
com.apple.driver.AppleUSBComposite      656.4.1
com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.6.6
com.apple.iokit.IOBDStorageFamily       1.7
com.apple.iokit.IODVDStorageFamily      1.7.1
com.apple.iokit.IOCDStorageFamily       1.7.1
com.apple.iokit.IOAHCISerialATAPI       2.6.1
com.apple.iokit.IOSCSIArchitectureModelFamily   3.6.6
com.apple.driver.AppleThunderboltNHI    2.0.1
com.apple.iokit.IOThunderboltFamily     3.3.1
com.apple.iokit.IOFireWireFamily        4.5.5
com.apple.iokit.IO80211Family   640.36
com.apple.iokit.IOAHCIFamily    2.6.5
com.apple.iokit.IOEthernetAVBController 1.0.3b4
com.apple.driver.mDNSOffloadUserClient 1.0.1b5
com.apple.iokit.IONetworkingFamily      3.2
com.apple.iokit.IOUSBUserClient 660.4.2
com.apple.iokit.IOUSBFamily     683.4.0
com.apple.driver.AppleEFINVRAM 2.0
com.apple.driver.AppleEFIRuntime        2.0
com.apple.iokit.IOHIDFamily     2.0.0
com.apple.iokit.IOSMBusFamily   1.1
com.apple.security.sandbox      278.11.1
com.apple.kext.AppleMatch       1.0.0d1
com.apple.security.TMSafetyNet 7
com.apple.driver.AppleKeyStore 2
com.apple.driver.DiskImages     371.1
com.apple.iokit.IOStorageFamily 1.9
com.apple.iokit.IOReportFamily 23
com.apple.driver.AppleFDEKeyStore       28.30
com.apple.driver.AppleACPIPlatform      2.0
com.apple.iokit.IOPCIFamily     2.9
com.apple.iokit.IOACPIFamily    1.4
com.apple.kec.corecrypto        1.0
com.apple.kec.pthread   1
Model: MacBookPro9,2, BootROM MBP91.00D3.B09, 2 processors, Intel Core i7, 2.9 GHz, 8 GB, SMC 2.2f44
Graphics: Intel HD Graphics 4000, Intel HD Graphics 4000, Built-In
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3431554638424455352D474E2D4620
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3431554638424455352D474E2D4620
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xF5), Broadcom BCM43xx 1.0 (5.106.98.100.22)
Bluetooth: Version 4.2.6f1 14216, 3 services, 15 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: Samsung SSD 840 EVO 120GB, 120.03 GB
Serial ATA Device: MATSHITADVD-R   UJ-8A8
USB Device: Hub
USB Device: FaceTime HD Camera (Built-in)
USB Device: Hub
USB Device: Hub
USB Device: Apple Internal Keyboard / Trackpad
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: IR Receiver
Thunderbolt Bus: MacBook Pro, Apple Inc., 25.1
Any help or ideas what may have caused this? I can't boot into safe mode, and i cannot mount the drive to repair in disk utility. Is there a way to resolve this myself?

External drives not showing in disk utility

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