Error creating Live USB

[NagaVenkat_K_Intel]

Hi,

I have created a Live USB using dd and after a while the USB died. I tried using a different pen drive and while booting it always displays MBR 1FA. I tried reformatting but still not able to succeed. Tried googling but no success. Is the problem with USB or am I doing something wrong?

Regards,

Raghu Kona

[Brendan_L_Intel]

NAGA VENKATA RAGHU KIRAN K. (Intel) wrote:

I have created a Live USB using dd and after a while the USB died. I tried using a different pen drive and while booting it always displays MBR 1FA. I tried reformatting but still not able to succeed. Tried googling but no success. Is the problem with USB or am I doing something wrong?

Can you post the exact dd command you are using? Few common issues:

1. no conv=fsync dd option and no `sync` done before unplugging USB stick for writing
2. wrote to partition instead of directly to device node (/dev/sdX1 vs correct /dev/sdX)
3. Image was not uncompressed (it's bz2 compressed so you need to `bunzip2` before writing
4. USB stick is too small
5. Image not fully downloaded

[NagaVenkat_K_Intel]

I am using this command

sudo dd if=devkit-live-img-final.binblob of=/dev/sdX bs=8M conv=fsync

Now I am getting a different error

dd: fsync failed for ‘/dev/sdb1’: Input/output error
955+0 records in
955+0 records out
8011120640 bytes (8.0 GB) copied, 692.881 s, 11.6 MB/s

[Matthias_H_Intel]

- check the filesize of the image (ls -la devkit-live-img-final.binblob) and compare with the size of your flashdrive (sudo fdisk -l /dev/sd<X>)

> is you your flashdrive sufficiently large at all?

- I would need to check - but the bunzipped bz2 image I downloaded was about 4GB as far as I remember. I am a bit puzzled your image is that large

- it looks like you dd'ed to /dev/sdb1 rather than to /dev/sdb (" ‘/dev/sdb1’: Input/output error") which would be wrong

[NagaVenkat_K_Intel]

The size of the devkit-live-img-final.binblob file is 8011120640 my flash drive size is 16 GB (14.9).

The downloaded unzipped file size is 4521773191

When i type the command df -h, USB is represented as

/dev/sdb1        15G  1.1M   15G   1% /media/raghu/C065-8342

so I used /deb/sdb1

[Matthias_H_Intel · Accepted solution]

that means your flashdrive is automounted. Pls unmount first (sudo umount /dev/sdb1) and then dd over to /dev/sdb rather than /dev/sdb1.

In order to use all your 16 GB you will have to resize the partition after dd'ing which is described in another IoT threa (e.g. using gparted)