The hard disk in a computer is formatted with specific file system so that the operating system can read and write into it. Or mount it manually sudo mkdir /mnt/mydriveĭrwxr-xr-x 3 root root 4096 Jan 31 9:28. Try to unplug and replug the device - it should be mounted automatically. Note: fdisk creates a partition 83 (Linux) by default.Īnd create now the ext4 file system on that new partition sudo mkfs.ext4 -L "J Connor" /dev/sdX1 (return for last sector default or set smaller size) Then create a partition (n), primary (p), part #1 (1), and whole size (default for first and last sectors (or set smaller size, ie lower last sector number)) n Or you can create one partition first, maybe smaller than 128 GB (from a "blank" disk)Ĭommands (h for help): ensure no partition p
If you want to assign the whole USB drive to one ext4 partition, you could simply overwrite the whole, including partition tableĬommand: sudo mkfs.ext4 -L "J Connor" /dev/sdX Unplug and, after a few seconds, re-plug the drive. Since writing directly to the device bypasses higher level mechanisms, a sync ensures data is actually written (not only in buffers)) sudo dd if=/dev/zero of=/dev/sdX bs=1M count=100 Then, optional, make the formatting tools "believe" the drive is blank by writing zeroes to the beginning of the flash memory (here 100 MB), to start from clean grounds. If necessary, umount whatever is mounted on that drive sudo umount /dev/sdXN To visually determine where you USB drive is, ie the letter X in /dev/sdX, and the partition(s), if any, N in /dev/sdXN.
Note: assuming to make a whole disk ext4 will destroy any existing data on that drive! Assuming you want to assign the whole drive to one ext4 partition. dev/mmcblk1 is apparently in use by the system will not make a filesystem problems with gparted running from the OS (ie not started from a "live" boot disk). However I got the same error that I get from gparted: sudo umount /dev/mmcblk1ġ04857600 bytes (105 MB) copied, 0.171444 s, 612 sudo mkfs.ext4 -L "J Connor" /dev/mmcblk1 I tried again, this time a different result (sort of) - when I checked the Chrome OS file system this time the device was not mounted like last time. If I remove the SD card the chromebook reboots. The system just sits at this point and doesn't do anything. Here is the output from the instructions below sudo umount /dev/mmcblk1 dev/mmcblk1p1 is apparently in use by the system will not make a filesystem here! Mkfs.ext4 -j -O extent -L "" /dev/mmcblk1p1 Set partition type on /dev/mmcblk1p1 00:00:01 ( SUCCESS )Ĭreate new ext4 file system 00:00:00 ( ERROR )
#LINUX FORMAT PARTITION EXT4 FULL#
The following is the full output from gpartedĬreate Primary Partition #1 (ext4, 116.73 GiB) on /dev/mmcblk1 00:00:03 ( ERROR )Ĭreate empty partition 00:00:02 ( SUCCESS ) I've Googled the error and everything seems to relate to RAID drives and the fixes get a little above my head I could successfully create a new partition but when I tried using mkfs.ext4 I get the same error message I get from gparted: /dev/mmcblk1p1 is apparently in use by the system will not make a filesystem here! This is what I am trying to do with the SD - is it essential to use ext4 for such an operation or would Fat32 work? However, when I inplug the card and reinser it, then format to FAT 32 it does it it within a minute or so.Īre there any known problems with formating SD cards of this size on Ubuntu? Is there anyway I can get it to format to ext4? Or does it just take forever and I need to be patient and let the operation run (it's been at least ten minutes so far and doesn't appear to be doing anything)? If I then try to format to FAT 32 it gives an error message. When I format to ext4 using gparted the operation never completes, I have to break the operation and get a warning that I am seriuusly damaging the file system.
I am trying to format a SanDisk 128GB SDXC card plugged into the internal SD card reader on a Toshiba Chromebook 2 running Crouton.
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