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cannot access usb

asked 2019-01-03 12:48:06 -0600

buzad gravatar image

Hi there, so I have a iMac with an old OS on, and I wanted to make a bootable drive out of an USB using my Windows Laptop. So I installed a program named TransMac and erased the FORMATTED DISK FOR MAC. I then tried to put the OS on, but the procedure failed. I went to see my USB, but I was unable to access it ("Please insert a disk into USB drive"). Then I went into proprieties and saw that there were 0 bytes used out of 0 bytes (even though my USB has 8GB). I didn't understand what's going on, so I tried to do ERROR CHECKING thing, but it didn't work. I went into disk management to see if I can do something there. I saw the drive "Disk 1 Removable Online" and nothing else, no capacity, no used space, nothing. Then I started looking on the web for explanations. There I found a command prompt option to solve the problem (the CHKDSK option) but it said that it was unable to perform the task because the drive is RAW. Then I downloaded M3DataRecovery app, hopping that it will solve the problem. It didn't though. I don't know what to do now. I didn't have any files on the USB, I just want to be able to access my drive again. Any reply will be useful for me. Thanks.

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answered 2019-01-20 19:46:38 -0600

If your USB has o bytes or no media, or RAW file system, the following causes is worth your attention: 1. USB flash drive is corrupted due to virus intrusion, or the MBR gets damaged.

  1. The formatting process gets failed due to some reasons.

  2. There are some bad sectors on flash drive.

  3. There is physical problem on the USB flash drive, such as circuits or boards fails to work.

  4. Power failure. Abrupt power failure while disk is writing data would damage the file system.

  5. Unplug the USB drive without ejecting or safely removing it. To fix this issue, you may need to rebuild MBR, or forcefully reformat it via a powerful 3rd party disk formatting tool. All those tasks can be easily achieved by AOMEI Partition Assistant, which i used before, worked great and totally free.

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answered 2019-01-04 00:01:11 -0600

nmgiffin gravatar image

If you have the gnome-disk-utility installed then you can install a new file system on the usb-drive. Just be sure that you know what device you are working with, (such as /dev/sdd1 for example). It should find the drive and allow you to install any file system you want such as ext4 or ntfs or other options. If you don't have this utility, then you can install a file system from the command line with the mkfs command. Again make sure you have read the manpages to understand what you are doing. You will need to use sudo or su to execute these. If you wanted to install the ext4 file system on a raw usb drive, in device /dev/sdd1 then you would specify: mkfs.ext4 /dev/sdd1 and you could accept the default options. The ext4 file system is the standard files system used with fedora linux, but if you want to make a portable usb stick readable from other OS's then perhaps ntfs is a better choice. Again be very careful on the drive designation or you can wipe out part of your file system.

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Of course all this is for using a linux system to format. If you are only using a windows laptop, then this forum might not be the best place to look for an answer. Sorry if I gave you a lot of useless (to you) info in the above answer if you are windows only.

nmgiffin gravatar imagenmgiffin ( 2019-01-04 00:16:03 -0600 )edit

Hi, thanks for the reply. I'm on Windows and I couldn't follow your indications. I found this article though and followed the manual method with command prompt and worked. Thanks anyway

buzad gravatar imagebuzad ( 2019-01-04 07:17:05 -0600 )edit

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Asked: 2019-01-03 12:48:06 -0600

Seen: 41 times

Last updated: Jan 04