external hard drive not mounting

Similar Questions

• External hard drive not appearing is not on Macbook Pro

  Hello

  I have problems with my external hard drive not appearing is not on my mac pro book. I did disk utility, and yet nothing has worked. I turned my computer on and off and the UN-plugged in the external hard drive. This has been a problem on my mac for a while and im frustrated book now. Im not sure what else to do. My external hard drive is a WD elements 1 TB. I tried the external hard drive on my windows of parents and it shows but does not appear on my mac book. I'm doing youtube videos, so I wanted to free my desktop because that all cluttered now. All my videos and my green screens that I use are on this external hard drive. Help, please.

  Thank you

  Open the Finder, then go to the Finder menu bar and click Finder > Preferences then select the general tab, then check that the external drives is enabled.

  If this does not help, make sure that OS X is up to date.

  Update the software on your Mac - Apple Support

• External hard drive not detected with the error: "You must format the disk in the J: drive until you can use it."

  Hello

  I have an external hard drive to work perfectly. I'm back from vacation, and it does not appear under "My Computer". It appears under "Devices and printers", however. This is a link to a screencap of Device Manager: http://i.gyazo.com/9e91e1d71ed32c55dba0419e79b499d5.png

  The device in question is that of J:, and it says here that he has 100% free space, that worries me, because he had only 50 GB of free space when I used the latter. After that I open the disk management, I get a pop up message saying: "You must format the disk in the J: drive until you can use it."

  How can I get my hard drive appears again?

  Thank you

  Original title: external hard drive not appearing is not in Windows 7

  Hi John,.

  Thanks for posting your query in Microsoft Community.

  I imagine the inconvenience that you are experiencing and will certainly help you in the right direction to solve the problem.

  According to the error message, I suggest trying the suggestions posted by the NakulShridhar responded on 14 October 2011 and by that alexquiteguy replied on 13 January 2011 in the thread following link and check if it helps.

  "You must format the disk in drive J: before you can use it"

  [Steps apply to Windows 7]

  Hope this information is useful. Let us know if you need more help, we will be happy to help you.

• External hard drive not a letter from reader: I already installed device driver for the same thing and it's showing in disk management.

  External hard drive not a letter from reader: I already installed device driver for the same thing and it's showing in disk management. But when I checked in system information, it is also displayed device but sectors and the tracs where showing the value 0.

  Hello Sharan,

  These links may help:

  http://TechNet.Microsoft.com/en-us/library/cc750198.aspx

  http://TechNet.Microsoft.com/en-us/library/cc977219.aspx

• External hard drive not appearing is not in the side bar of the Finder

  My external hard drive does not appear in my sidebar of the Finder on my MacBookPro. It is mounted (I checked the disk utility) and my Finder preferences are set for the drives appear in the sidebar. It's a Toshiba 2 TB and I can access it on other MacBookPros.

  Just to check, you have the option turned on in Finder-> Preferences-> sidebar.

  Double check because there is another option in the Finder-> Preferences-> general of external drives to appear on the desktop.

  

• External hard drive not saved

  Time machine is not back up an external hard drive, even if it is removed from the exclusion list in the preferences of TM. The drive checks very well with disk utility and disk Warrior. Please notify.

  How the external hard drive is connected, and how it is formatted?

• External hard drive not in my computer

  Hello

  I have a question on my external hard drive. It's a drive hard 2.5 "of Toshiba (1 GB).
  I used it already for a long time on my laptop (WINDOWS VISTA) and it worked perfectly until today. I plugged in my hard drive as
  usual and it does not appear on my computer. I looked on the internet and found something about research
  Start - Run diskmgmt.msc, (uitvoeren) - so I tried.
  He showed the next thing on my HARD drive:
  Disc 1
  Unknown
  931,51 GB
  Not initialated (niet geinitialiseerd)
  Unassigned (niet toegewezen)

  I didn't know what to do, so I tried some things. I pressed the right mouse button and he said "initialize disk". I pressed on it and he gave me 2 choices: MBR or GPT.
  I tried both, but they both said: data error: Ketal redunatiecontrole.
  So, I tried something different. I pressed the right button of my mouse again but this time on the black bar beside the disc information. He said "New simple volume", but I dared not go further because I didn't know if I would lose my data or not, if I would. Also, I didn't know how big the new volume should be.

  He also said that the device works properly when I press 'characteristics '.

  I don't know what to do now, and also I don't want my files to be deleted.

  Can someone help me?

  (Sorry for my bad English, if I write it in Dutch because you do not understand my problem, please tell me ;)))

  Can you please test it on another computer just to be sure, the same thing happens again?

  When you connect you hear beep sounds when the new device is connected?

• Satellite click mini external hard drive not reconising or external DVD drive

  Hi guys,.
  I recently bought a Toshiba satellite click on mini, tried to use my external hard drive, but its does not at all. Any ideas on how to solve this problem?
  It is a Seagate 250 GB hard drive. Thanks in advance

  Posted by rachel.nickells
  

  Hi guys,.
  I recently bought a Toshiba satellite click on mini, tried to use my external hard drive, but its does not at all. Any ideas on how to solve this problem?
  It is a Seagate 250 GB hard drive. Thanks in advance

  It is powered by usb? If yes the hard drive turning upward? There are the sounds of rattling of the reader?

• 3 50 PX1394U external hard drive not recognized

  I recently bought the external hard drive, Toshiba PX1394U 3 50. I followed the instructions for the installation and everything went as planned either he found material etc. and returned with the message of successful installation.

  However, when I go in my computer that there should be an icon for the external hard drive and it does not exist.

  I saw the thread, recommending using REGEN, but this has no effect on the problem - the icon still does not appear in my computer.

  I use a laptop computer from a different manufacture running Windows XP and all updates are loaded.

  I also had the same problem when loading on my desk.

  Any ideas?

  If you get the message installation was successful, you should find the HARD disk in disk management.
  Control Panel > administrative tools > computer management > disk management

  Maybe you first create a partition or format, but normally you will see players all recognized.

• FireWire hard drives not mounting not always

  I have two G - Drive Mini 500 GB external hard drives. I use one on my iMac and the other on my Mac Book Pro. They are both partitioned so that Time Machine will run a single partition and SuperDuper on the other.

  I leave readers to market so that the computer can control them at startup and shutdown.

  The problem is that about 50% of the time, when I start to computers, the hard drive won't install, or sometimes get only one partition.

  When this happens, if both partitions are unable to climb, turn off the player, and then, and the player then goes up (most of the time).

  If only one partition goes, I have everything first eject the partition and then turn the disc and the.

  This has happened for years, with different firewire cables and external drives of different model.

  It is an intermittent problem. (My favorite kind!)

  A USB cable would improve this situation?

  I have not yet tried.

  Any ideas or suggestions would be greatly appreciated.

  Thank you.

  P.S. I'm on OS X 10.11.3 on both computers, although this problem exists with several older versions of the OS.

  The problem returned on my MBP last night and my iMac this morning.

  I went from Firewire cables USB to see if that helps.

  Will report back in a few days.

• PX1268E 400 GB external hard drive not detected

  Hi all

  I bought a Toshiba external hard 400GO USB Drive of DABS it delivered without a CD Rom. I plugged the USB cable into the computer, but it did not detect the drive, even after re - starts or try other USB slots. Not shown in Device Manager. I probably need this CD to complete the installation Yes? Download the installer from here?
  Any info/advice gratefully received.
  see you soon

  Hello

  I don't know if this external HARD drive needs an additional but installation CD everything must be shipped with the HARD m disk box!
  To my knowledge this HARD drive needs an external power supply. The cable must be delivered also with this HARD drive.

  So take your manual HDD and check shipped all parts! If something is missing you dealer of HARD drive!

  PS; the CD cannot be downloaded on the net!

• External hard drive not detected

  I have an external hard drive of 4 Marine to... .and a Macbook pro with the latest El Capitan... When I connect the external hard drive for Mac pro, an external hard drive can not detect, but there is a light flashing on the external hard drive. It worked well until last night after I used iTunes and went to another Mac. I still eject properly.

  Any ideas on how to solve this problem

  Try using disk utility to repair the disk. If the drive does not appear in the disk utility list, then he dies. Contact the manufacturer or supplier.

  Shut down the computer, disconnect the drive. Wait five minutes and then reboot and reconnect the drive.

• Library of photos on external hard drive: not possible repair

  Hello world

  Today, when I tried to open my library of Photos, Photos crashed. After I have reopened, Photos asked that the library must be repaired. I started who, but after 2%, Photos crashed with "an unexpected error has occurred." A restart does not solve this problem. I still can't view the contents of the library package.

  I saw on messages earlier (for example, 10.10.3 Photos can not repair permissions), the output of this Terminal command can reveal the underlying error:

  find ~ $TMPDIR...------(-+ flags sappnd, uappnd, schg, uchg o! - user $UID o! - perm-600 o - acl-) 2 >/dev/null | WC-l

  Outputs this line in my case: 4471

  Please note that I'm storing my photo library, including all images imported into a separate external hard drive connected via USB.

  So perhaps the command above (where I'm not sure what it does) may not be to give the required output to track down the problem.

  Following the crash of the pictures, here is the output of the Console:

  Dienstag, 22.12.15 19:39:22, photolibraryd 504 [1483]: failed to open the library Fotos Library.photoslibrary error: Domain = com.apple.lithium error Code = 303 '(null) '.

  Dienstag, 22.12.15 19:39:28, photolibraryd 720 [1483]:-[NSNull integerValue]: unrecognized selector sent to instance 0x7fff797dc780

  Dienstag, 22.12.15 19:39:28, photolibraryd 722 [1483]: * reason for termination due to an untrapped exception "NSInvalidArgumentException" app,: '-[NSNull integerValue]: unrecognized selector sent to instance 0x7fff797dc780'

  First throw call stack:

  (

  0 CoreFoundation 0x00007fff993b5ae2 __exceptionPreprocess + 178

  1 libobjc. A.dylib 0x00007fff955be73c objc_exception_throw + 48

  2 CoreFoundation 0x00007fff993b8b9d-[NSObject (NSObject) doesNotRecognizeSelector:] + 205

  3 CoreFoundation 0x00007fff992f1601 ___forwarding___ + 1009

  4 CoreFoundation 0x00007fff992f1188 _CF_forwarding_prep_0 + 120

  5 photolibraryd 0x000000010411f2ff _ZNSt3__114__split_bufferINS_4pairINS_10shared_ptrIN2Li6Sqlite9StatementEEEU8__ strongP31LiServiceSqliteNoteBufferReaderEERNS_9allocatorISA_EEED2Ev + 164451

  6 photolibraryd 0x000000010409a414 _ZNSt3__16__treeINS_12__value_typeImNS_4pairIU8__strongP16LiSearchKitIndexU8__s trongP8NSStringEEEENS_19__map_value_compareImSA_NS_4lessImEELb1EEENS_9allocatorI SA_EEE4findImEENS_15__tree_iteratorISA_PNS_11__tree_nodeISA_PvEElEERKT_ + 13196

  7 libdispatch.dylib 0x00007fff9b17933f _dispatch_client_callout + 8

  8 libdispatch.dylib 0x00007fff9b17a926 _dispatch_barrier_sync_f_invoke + 74

  9 photolibraryd 0x000000010409a34f _ZNSt3__16__treeINS_12__value_typeImNS_4pairIU8__strongP16LiSearchKitIndexU8__s trongP8NSStringEEEENS_19__map_value_compareImSA_NS_4lessImEELb1EEENS_9allocatorI SA_EEE4findImEENS_15__tree_iteratorISA_PNS_11__tree_nodeISA_PvEElEERKT_ + 12999

  10 libdispatch.dylib 0x00007fff9b18692e _dispatch_data_apply + 110

  11 libdispatch.dylib 0x00007fff9b18b44e dispatch_data_apply + 31

  12 photolibraryd 0x000000010409a114 _ZNSt3__16__treeINS_12__value_typeImNS_4pairIU8__strongP16LiSearchKitIndexU8__s trongP8NSStringEEEENS_19__map_value_compareImSA_NS_4lessImEELb1EEENS_9allocatorI SA_EEE4findImEENS_15__tree_iteratorISA_PNS_11__tree_nodeISA_PvEElEERKT_ + 12428

  13 photolibraryd 0x000000010414334d _ZNSt3__114__split_bufferINS_4pairINS_10shared_ptrIN2Li6Sqlite9StatementEEEU8__ strongP31LiServiceSqliteNoteBufferReaderEERNS_9allocatorISA_EEED2Ev + 311985

  14 libdispatch.dylib 0x00007fff9b199c0b ___dispatch_operation_deliver_data_block_invoke + 118

  15 libdispatch.dylib 0x00007fff9b184871 _dispatch_call_block_and_release + 12

  16 libdispatch.dylib 0x00007fff9b17933f _dispatch_client_callout + 8

  17 libdispatch.dylib 0x00007fff9b17df6f _dispatch_queue_drain + 754

  18 libdispatch.dylib 0x00007fff9b18463b _dispatch_queue_invoke + 549

  19 libdispatch.dylib 0x00007fff9b17cc87 _dispatch_root_queue_drain + 538

  20 0x00007fff9b17ca34 _dispatch_worker_thread3 + 91 libdispatch.dylib

  21 libsystem_pthread.dylib 0x00007fff9319468f _pthread_wqthread + 1129

  22 libsystem_pthread.dylib 0x00007fff93192365 start_wqthread + 13

  )

  Dienstag, 22.12.15 19:39:28, 723 diagnosticd [134]: error assessment process info - pid: 1483, puniqueid: 1483

  Dienstag, 22.12.15 19:39:28, com.apple.xpc.launchd [1 724]: (com.apple.photolibraryd [1483]) Service was released due to the signal: Abort trap: 6

  Dienstag, 22.12.15 19:39:28, 725 Photos [1785]: error: Domain error Code = com.apple.reddwarf = 504 UserInfo = {XPC = connection down, NSLocalizedDescription = RDErrorServiceCommandNotProcessed} "RDErrorServiceCommandNotProcessed" while trying to open the Library.photoslibrary Fotos

  Dienstag, 22.12.15 19:39:28, 742 Photos [1785]: file:///Volumes/MusicPhotos/Fotos/Fotos%20Library.photoslibrary/ lost connection

  Dienstag, 22.12.15 19:39:28, com.apple.xpc.launchd [1 752]: (com.apple.ReportCrash [1791]) endpoint has been activated through legacy launch (3) API. Please go to XPC or bootstrap_check_in(): com.apple.ReportCrash

  Dienstag, 22.12.15 19:39:29, ReportCrash 190 [1791]: report of incidents recorded for photolibraryd [1483] version 1.3 (350.23.0) to/Users/andrefischer/Library/Logs/DiagnosticReports/photolibraryd_2015-12-22-193 929_Fischi.crash

  Dienstag, 22.12.15 19:39:32, 586 pictures [1785]: connection to the lost storage engine. Recognized user exit.

  Dienstag, 22.12.15 19:39:32, com.apple.xpc.launchd [1 608]: (com.apple.Photos.9632 [1785]) Service came out with abnormal code: 1

  Here is my system information:

  MacBook Air 13 "mid 2012, El Capitan 10.11.2, Intel Core i7 2 GHz, 8 GB of RAM

  I'm not quite desperate, because I'm having several backups of the library (only a few images are not yet backed up). However, also in the interest of others less fortunate that me regarding backups, I would like to know

  (1.) what is the cause of this unexpected behavior

  (2.) what can be done to remedy this.

  Thank you very much in advance, any help is appreciated.

  How the EHD are formatted?  It must be formatted for OS X Extended (journaled) preferable with the property set to be ignored:

  

  You have a backup copy of the library just before this problem started?

  

• External hard DRIVES not detected

  I recently encountered a problem in the recognition of external hard drives of the company. But the usb recognizes pen mouse drivers, card readers etc... can someone help me pls.

  I use HP pavilion G6 2005ax win7 ultimate.

  If it is not giving an error message but it is to let you manually assign a drive letter, then the automount can be disabled (enabled by default).  See the jeffsrawr response in this thread to turn automount.

• external hard drive not recognized by my computer

  My external hard drive was working fine until I accidentally unplugged from its station USB then I backup my files on it. Now when I plug it in, the computer does not display its existence. Help, please

  Hello

  Who is the manufacturer of the hard drive?

  Try to connect the player to another USB port and see if it works.
   
   
  I also suggest you to run the Fixit provided in the link:
  A computer that is running Windows XP cannot detect a USB, an Apple iPod flash drive or an external hard disk drive

  http://support.Microsoft.com/kb/925196

   
   
  I hope this helps!