LinuxQuestions.org
Help answer threads with 0 replies.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 01-04-2016, 03:37 AM   #1
vincix
Senior Member
 
Registered: Feb 2011
Distribution: Ubuntu, Centos
Posts: 1,032

Rep: Reputation: 76
sees only a 6MB partition on usb stick with Centos 7


Hi,

I've written a Centos 7 on a usb stick with Rufus. On Mac OS and on Windows I can only see a 6MB partition the label of which says "ANACONDA". The usb stick works all right, I have already installed Centos from it. The question is, why does this happen? Why can't I see the bigger partition?
 
Old 01-04-2016, 04:07 AM   #2
Ztcoracat
LQ Guru
 
Registered: Dec 2011
Distribution: Slackware, MX 18
Posts: 9,484
Blog Entries: 15

Rep: Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162
I'm not sure why you can't see the bigger partition but you can use the command fdisk -l (small letter L) while you have Centos up and running to view all partitions.

Maybe there is something proprietary on your Mac that prevents you from seeing the partition because Mac doesn't recognize it. (guessing)

The 6 MB partition is labeled ANACONDA?

-::-Anaconda is the installer for Centos so I find that odd.-::-
 
Old 01-04-2016, 04:37 AM   #3
ilesterg
Member
 
Registered: Jul 2012
Location: Kuala Lumpur
Distribution: Debian, CentOS/RHEL
Posts: 582

Rep: Reputation: 61
Out of interest, I also encountered this same "problem" when I installed a Debian and CentOS installers on my USB stick. I can't find the technical explanation why my Windows (8.1) can only recognize a small partition of the USB stick, but it appears that it's the case with USB devices which have Linux installers on them.

When you format the drive (still using Windows), you will still get the small size. You still need to plug it to your Linux machine and fdisk to wipe it clean so you can see the whole USB disk size in Windows.
 
Old 01-04-2016, 04:47 AM   #4
vincix
Senior Member
 
Registered: Feb 2011
Distribution: Ubuntu, Centos
Posts: 1,032

Original Poster
Rep: Reputation: 76
Quote:
Originally Posted by Ztcoracat View Post
I'm not sure why you can't see the bigger partition but you can use the command fdisk -l (small letter L) while you have Centos up and running to view all partitions.

Maybe there is something proprietary on your Mac that prevents you from seeing the partition because Mac doesn't recognize it. (guessing)

The 6 MB partition is labeled ANACONDA?

-::-Anaconda is the installer for Centos so I find that odd.-::-

There's nothing proprietary on the mac that could interfere. On Windows disk manangement it says that the partition is unallocated. As I was saying, given that the Centos works, I don't have a problem with it, I would just like to understand why this is happening.

On the other hand, I would like to still use the usb for copying files while still being bootable. That wouldn't hurt.
 
Old 01-04-2016, 04:55 AM   #5
Ztcoracat
LQ Guru
 
Registered: Dec 2011
Distribution: Slackware, MX 18
Posts: 9,484
Blog Entries: 15

Rep: Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162
Which partition are you referring to that says it's 'unallocated'?

W/O seeing all of the partitions on your machine it's hard to visualize.

If you would list all of the partitions on your machine I could tell you what is going on and perhaps why to your question.

Last edited by Ztcoracat; 01-04-2016 at 05:02 AM.
 
Old 01-04-2016, 08:08 AM   #6
michaelk
Moderator
 
Registered: Aug 2002
Posts: 19,049

Rep: Reputation: 2895Reputation: 2895Reputation: 2895Reputation: 2895Reputation: 2895Reputation: 2895Reputation: 2895Reputation: 2895Reputation: 2895Reputation: 2895Reputation: 2895
Hybrid images contain their own master boot record so the entire flash drive is overwritten including the partition table. Therefore the drive will appear to be smaller than its actual size. As stated if you delete and recreate the partition table then format the drive it will be back to "normal".
 
Old 01-04-2016, 08:42 AM   #7
yancek
LQ Guru
 
Registered: Apr 2008
Distribution: PCLinux, Slackware
Posts: 8,608

Rep: Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772
Windows won't see any partition except the first on a flash drive, at least a standard install of windows. There may be some convoluted way around this some windows user could explain. It doesn't matter what filesystem the second/third, etc. partition are, windows or other. Check the links below. With a standard drive attached by usb port, windows will show all partitions.

http://www.sevenforums.com/general-d...s-windows.html

http://superuser.com/questions/43653...ive-in-windows

Some suggestions at the windows 10 forum you might try.

http://www.tenforums.com/drivers-har...ash-drive.html
 
Old 01-04-2016, 02:04 PM   #8
John VV
LQ Muse
 
Registered: Aug 2005
Location: A2 area Mi.
Posts: 17,454

Rep: Reputation: 2601Reputation: 2601Reputation: 2601Reputation: 2601Reputation: 2601Reputation: 2601Reputation: 2601Reputation: 2601Reputation: 2601Reputation: 2601Reputation: 2601
Microsoft dose not and will never support partition formats that they DO NOT OWN

the ect4,lvm,ext3,... partitions can NOT be seen by windows

Because Microsoft WILL NOT support it
 
Old 01-04-2016, 08:00 PM   #9
Ztcoracat
LQ Guru
 
Registered: Dec 2011
Distribution: Slackware, MX 18
Posts: 9,484
Blog Entries: 15

Rep: Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162Reputation: 1162
Quote:
Originally Posted by John VV View Post
Microsoft dose not and will never support partition formats that they DO NOT OWN

the ect4,lvm,ext3,... partitions can NOT be seen by windows

Because Microsoft WILL NOT support it
Thanks for making that clear.
 
Old 01-05-2016, 07:47 AM   #10
vincix
Senior Member
 
Registered: Feb 2011
Distribution: Ubuntu, Centos
Posts: 1,032

Original Poster
Rep: Reputation: 76
Thank you all for your answers. You've offered a lot of ideas. I inserted the stick into a Cent OS computer. When I run fdisk -l, the two partitions show up twice, once as /dev/sdb1 and /dev/sdb2, and secondly as /dev/sdb1p1 and /dev/sdb1p2 respectively.

The first partition, which is the big "missing" one is "Empty". This is what it says under the "System" column. For the second one, it says EFI (FAT-12/16/32). So I probably wrote the disk using the UEFI option. So what is happening exactly, why is this happening? Does anyone know?
 
Old 01-05-2016, 08:08 AM   #11
yancek
LQ Guru
 
Registered: Apr 2008
Distribution: PCLinux, Slackware
Posts: 8,608

Rep: Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772Reputation: 1772
Take a look at the link below to see if that helps.

http://www.linuxforums.org/forum/red...artitions.html
 
Old 01-05-2016, 08:28 AM   #12
oldtechaa
Member
 
Registered: May 2015
Location: US
Distribution: Fedora
Posts: 364

Rep: Reputation: 83
I've written an isohybrid image of several distributions. All appear to have a small partition and a larger EFI partition. That's just the way the partition table looks. However, from Linux, other partitions can be added with fdisk. It's probably because the bootloader is in that region of the disk.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
How to remove usb stick U3 partition Pedroski Linux - Hardware 5 12-05-2012 05:35 AM
What is the best way to install CentOS to a USB stick to use as a harddrive, not live abefroman Linux - Server 1 11-30-2012 08:58 PM
anaconda sees RAID devices (aic-94xx); installed CentOS sees individual drives JMCraig Linux - Hardware 0 01-31-2011 02:56 PM
usb stick partition problem patrickman Linux - Newbie 5 01-24-2011 04:45 PM
CentOS / USB stick. zaxonus Linux - General 3 02-22-2008 10:08 AM

LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 08:56 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration