Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I am using a Seagate external hard disk on Windows. It is working properly, but the same hard disk is not working in Ubuntu 12.10. I would like to know what is the problem.

This is the output of lsusb:

Bus 001 Device 002: ID 8087:0024 Intel Corp. 
Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp.       
Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 
Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 
Linux Foundation 2.0 root hub Bus 001 Device 003: ID 04f2:0112 
Chicony Electronics Co., Ltd KU-8933 Keyboard with PS/2 Mouse port Bus 002 Device 003: ID 064e:e263 Suyin Corp.

This is the output of sudo fdisk -l:

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! 
The util fdisk doesn't support GPT. Use GNU Parted. 
Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors 
Units = sectors of 1 * 512 = 512 bytes 
Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes 
Disk identifier: 0x5b457659 

Device Boot Start End Blocks Id System /dev/sda1 1 976773167 488386583+ ee GPT Partition 1 does not start on physical sector boundary. 
Disk /dev/mapper/sda3_crypt: 499.6 GB, 499648561152 bytes 255 heads, 63 sectors/track, 60745 cylinders, total 975876096 sectors 
Units = sectors of 1 * 512 = 512 bytes  
Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes 
Disk identifier: 0x00000000 
Disk /dev/mapper/sda3_crypt doesn't contain a valid partition table

Disk /dev/mapper/ubuntu-root: 497.6 GB, 497570283520 bytes 255 heads, 63 sectors/track, 60492 cylinders, total 971816960 sectors 
Units = sectors of 1 * 512 = 512 bytes  
Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes  
Disk identifier: 0x00000000 
Disk /dev/mapper/ubuntu-root doesn't contain a valid partition table

Disk /dev/mapper/ubuntu-swap_1: 2025 MB, 2025848832 bytes 255 heads, 63 sectors/track, 246 cylinders, total 3956736 sectors  
Units = sectors of 1 * 512 = 512 bytes  
Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes 
Disk identifier: 0x00000000 
Disk /dev/mapper/ubuntu-swap_1 doesn't contain a valid partition table

Sometimes the external hard disk is detected, but sometimes it is not detected.

share|improve this question
3  
Hi! Welcome to Ask Ubuntu. Could you add some details to your question, like the output of lsusb? Also, if you go to the dash and further go to Disk Utility, is your External HD visible? –  Projjol Jul 20 '13 at 5:29
1  
Also, can you show us the output of sudo fdisk -l? This (and lsusb mentioned in the above comment) are executed in a terminal; open one by Ctrl+Alt+T. When you get the output, edit your question to paste the output. –  Alaa Ali Jul 20 '13 at 8:37
    
sometimes it is detected, but sometimes external hard disk is not detected... –  ashish Jul 21 '13 at 6:48

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.