Can't format pen driver of 16GB, it just show 4.1GB

Question

After create a bootable disk, I can't format my pendrive, I use the command

"sudo dd if=/dev/zero of=/dev/sdb bs=512 count=1" and after that, it just shows 4.1GB instead of 16GB. The Gparted just shows 4GB too and I can not erase or create a partition table from it. The Disc utility from Ubuntu gives me an error if I try format the pendrive. What can I do to get the real size of my pendrive?

score 1 · Accepted Answer · answered Oct 16 '16 at 03:54

1

blockdev --getsize64 /dev/sdb will print device size in bytes. See the man page.

answered Oct 16 '16 at 03:54

kenberland

61
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It gives me the size but how can I format it? – Renan Willamy Oct 16 '16 at 11:31
What does `sudo fdisk -l` give you? – kenberland Oct 17 '16 at 20:23
It gives me this: – Renan Willamy Oct 18 '16 at 01:28
Disk /dev/sdb: 15,7 GiB, 16840130560 bytes, 32890880 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes – Renan Willamy Oct 18 '16 at 01:30
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That looks good to me. Partition and format it. See: http://www.howtogeek.com/106873/how-to-use-fdisk-to-manage-partitions-on-linux/ – kenberland Oct 18 '16 at 05:04

Can't format pen driver of 16GB, it just show 4.1GB

1 Answers1