Hardware :: Unknown Partition Table On USB Thumb Drive
Jul 29, 2010
My friend gave me a flash drive with some important files on it that one day didn't work with his windows box. Upon plugging in the thumb drive, Windows gives a "you must format this disk before it can be used" message. I tried running a data recovery program (Easeus) on it but didn't have great results- only recovered some .wav files, a few .avi files and a .exe- none of which were very important, so I figure'd I'd try to mount it in Linux and possibly see the rest of the filesystem. The thumbdrive is a 2GB Lexar JD Firefly I plugged in the thumb drive and it is picked up by the system, but I can't access it. Here is the output of lsusb
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Jan 10, 2010
i have FC10, and have loss my grub because a windows 7 instalation (other partition). I am trying to re-install the grub version 0.97, so i used:
FC10 DVD install + repair a system
then:
Code:
chroot /mnt/sysimage
grub
but i got:
unknown partition table signature.
so i can not make any grub command:
Code:
grub> find /boot/grub/stage1
error 15: file not found
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Apr 17, 2016
I update Jessie "stable" 8.2 to 8.4 and now I get 5 minute interval kernel messages:
Apr 18 06:39:52 OraHost kernel: [131985.494726] sdc: unknown partition table
Apr 18 06:45:03 OraHost kernel: [132295.755942] sdc: unknown partition table
Apr 18 06:50:03 OraHost kernel: [132595.946564] sdc: unknown partition table
Apr 18 06:55:13 OraHost kernel: [132906.139327] sdc: unknown partition table
Apr 18 07:00:23 OraHost kernel: [133216.340555] sdc: unknown partition table
I believe this has something to do with an mdadm update which was included in the release. When I configured the array, I didn't partition the disk devices, so maybe that has something to do with it. I am thinking of rebuilding the array and partitioning prior to build, but a quick fix would be referable.
And also something appears to have happened to the raid device since the update.
Prior to update, the array was /dev/md0 - now it is /dev/md/0 which is a symbolic link back to /dev/md0.
mdadm --detail --scan now reports /dev/md/0 where previously it reported /dev/md0
I created a new RAID1 array on a fresh system and immediately after the create, these messages appear at 5 minute intervals.
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Mar 23, 2011
I want a subset of files on a usb to be less likely to corrupt or, have any contact with/ acess to, the rest of the files on the usb.
Q: is there any advantage in putting the subset on a separate partition within the USB drive?
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Jan 26, 2011
I have tried to automate the configuration of a usb drive with not much success.
The problem that I have is that I have a large amount of usb drives that have a partition table of type "loop" and I need to change them to "msdos". The size of the drives vary and I need to use FAT32 or FAT16 file system.
I've tried various partitioning commands and gui applications but cant find one that I can give a one line command to to set the partition table, maximum partition size and file system.
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Aug 6, 2010
Is there a difference between using GPT partition table when formating hard drives and MS-DOS partition table? What are the advantages/disadvantages of using either?
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Dec 21, 2010
I have an external USB drive, with GPT partition label. The drive is cut up into two ~1.5TB partitions When I plug this into my CentOS 5.5 box, the drive is not detected. Instead, dmesg gives me this:
usb-storage: device found at 7
usb-storage: waiting for device to settle before scanning
Vendor: Seagate Model: FA GoFlex Desk Rev: 0155
Type: Direct-Access ANSI SCSI revision: 04
SCSI device sdh: 732566645 4096-byte hdwr sectors (3000593 MB)
sdh: Write Protect is off
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Apr 2, 2010
I'm upgrading from a 250GB drive to a 500GB drive. I booted into the live-CD, ran gparted and created the necessary partitions:
/dev/sda1 ext4 /
/dev/sda2 swap
/dev/sda3 ext4 /home
then I used dd to transfer data from the old drive to the new drive. Now I am unable to boot into the new drive. I tried to boot again from the live-CD but fdisk reports that the drive has no partition table. I can still mount the devices (e.g. mount /dev/sda3 /mnt/sda3) and I can see all the files. But without a partition table, I can't set one partition to be bootable. Why doesn't gparted create a partition table? it created the filesystems just fine. how do I boot into the new disk? What do I have to do to make grub handle the new disk?
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Apr 5, 2010
Are there plans to alter or improve our partition options surrounding the change from 512 to 4096 byte sectors? It seems that the DOS-world of four primary partitions is a bit screwy in a world of tera-byte drives.
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Jul 31, 2010
GParted tells me my hard drive is not partitioned and has an unrecognised partition table, but I know it has because i'm using it now to write this on here, and fdisk shows the following:
Quote:
Anyone know of anyreason GParted may not be working or can offer an alternative to create a partition?
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Mar 30, 2010
The software: Ubuntu Server Edition 9.10.The wetware: A programmer doing his best (read: ignorant, shitty) as an ad-h.When I plug the USB thumb drive in, the install OS gives it a drive letter -- /dev/sdb -- and it pushes the original /dev/sdb down to /dev/sdc. The installation works without a hitch, and GRUB2 installs, dutifully pointing the root at /dev/sdc1 instead of /dev/sdb1.I let GRUB2 start normally ("drive not found"), holding the <shift> key to get to the "rescue>" prompt.From there, I issue "ls" to discover that GRUB can NOT see /dev/sdb, and I can tell that because what is showing up as (hd1) does NOT have three partitions as it should.GRUB2 sees a total of 16 drives, not 26, and one of the drives it sees is "fd0" (there is no floppy drive).Issuing commands like "set prefix=(hdx,y)" and "root=(hdx,y)" have no effect as, I think it's just pointing to the (reiserfs)content drives and this GRUB2 tells me "unknown filesystem".I did try them all in vain, hoping that maybe I'd find a kernel somewhere.I used the "rescue" mode of the Ubuntu installer (the USB thumb drive) to get to a root prompt.From there, I mounted /dev/sdc2 (the "shifted" /dev/sdb2) onto /mnt, I mounted /dev/sdc1 (the "shifted" /dev/sdb1) onto /mnt/boot,and then I chroot'ed to /mnt.I edited /boot/grub/grub.cfg, editing every instance of "root=(hd2,1)" to the appropriate UUID for the "real" /dev/sdb1. Then I issued update-grub2.It refused to work giving me an banal "no such partition" error or something like that.
We originally had this server functioning by putting / and /boot on the SS SanDisk, which caused no problems during installation because /dev/sda doesn't get shifted.We then figured it was a good idea to put our OS files on something with failover capability. And that started us down this crappy "shifting drive letter" path.Can I control which drive letter the USB thumb drive gets assigned during the install process?If I could make it be /dev/sdc then I wouldn't be facing this problem.An alternate solution would be to know the cryptic GRUB2 commands that I can issue from the command prompt post-install, pre-reboot.But I'm wondering if that will ultimately work at all considering that GRUB2 couldn't see /dev/sdb at all.
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Feb 4, 2010
I am new to Linux ,i did one project in windows which will block the thumb drive with respect to serial number(Device instance ID) of the device.i am planning to do the same project in Linux using c/c++.I am very new to Linux,there is no drive letter for thumb drives we insert into Linux OS.How to get Drive letter and how to get Device instance id of thumb drives please help me get some clues.please provide me any tutorial or any links .w if have any other clues to block devices with respect "block list" and "allow device list".if the serial number in block list it has to block if serial number in allow device list it has to allow thumb drive to access.
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Mar 24, 2009
Nothing happens when ordinary users plug in a USB thumb drive or insert a CD into CDROM drive. Works fine for root. After root mounts the drives then all users can use them. How can I enable mounting/unmounting by all users?
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Oct 27, 2010
when I try to send emails to new created emails account, I get this error:
<teste@topdapop.com>: Recipient address rejected: User unknown in virtual mailbox table�
And if I try to send a e-mail, the authentication fails if I setup the account at the desktop email client to password requirement on.
But it works when I try it using a webmail client (Horde) and I receive the email.The old emails accounts work fine. The new accounts and old ones were created with Plesk.I find an entry with
/usr/local/psa/admin/sbin/mail_auth_view | grep teste@topdapop.com
I get no output from
strings /var/spool/postfix/plesk/virtual.db | grep teste@topdapop.com
Using mchk and mailmng does not seems to change that.
I also found the file /etc/postfix/virtual.db .strings /etc/postfix/virtual.db : no output
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Jan 10, 2010
hen I change innodb_log_file_size to more than 5mb no php script is working... and I have this strange error in my scripts errror_log
Date: Sun, 10 Jan 2010 15:00:39 +0200
Error Number: 1286
Error: Unknown table engine 'InnoDB'
IP Address: 77.7.246.165
Page: /index.php?showtopic=174868
mySQL query error: SELECT * FROM ibf_topics WHERE tid=174868
I change it in my.cnf than restarted mysql
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Aug 1, 2010
i tried to connect my samsung usb mp3 player and it is not showing up in mycomp. i tried to debug the issue but being a noob i didnt get anywer.
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May 1, 2011
So i saw a thread somewhere about using a thumb drive to make extra ram for your pc. This was of course on a windows pc. I was wondering if this works on Ubuntu also and if it is really worth it?
Also if you have 4 USB ports could you put in 4 usb thumb drives and have a fantastic amount of ram?
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Jun 25, 2011
I have a new Giada cube with no hard drive, so my plan is to simply run a Linux/MythTV distro called MythDora from a Patriot 8GB USB stick (this Giada does not PXE boot). I am having trouble figuring out exactly how to make this work. Yesterday, although I have forgotten exactly how, I was able to put a MythDora Live image on the stick and boot up. I went through the initial setup, and then, when I was all done, I rebooted, and..it started all over again...as if I was doing it for the first time. So...What do I need to do to create a proper bootable USB stick?What ISO image should I use? The full DVD? Or the Live ISO? or the Network image?Do I need to partition the stick and load the O/S from one small partition, transferring the installation to another larger one?What utility should I use to create the bootable stick? unetbootin? or similar?Do I have to do anything special to make my O/S and configuration changes persistent on the USB stick?
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May 9, 2011
I want to copy my /home to a USB thumb drive recursively. I've wrestled with this for a few hours now and continue to spin my wheels.The device is listed in my Disk Utility as /dev/sdc. However a little further down it is listed as /dev/sdc1 ? Anyway, I relabeled the volume as usb stick and formatted it to Ext4. I mounted it at /media/usb stick Do I have to enter this drive into the fstab? If so, how? what do I write? Using the command : cp -R (what follows... I want to copy /home recursively to the usb thumb drive.)
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Dec 10, 2009
I need to have a web app that is feeding ip camera feeds across internet to a server. Need to have thumb drive preconfigured with cameras prior to shipping. End user plugs in cameras, puts thumb drive in any running PC, have WEB app start with some menu options to like name the feeds. Back at server receiving feeds are broadcasted via secure web site.I have never worked with Linux but have read some incredable things already.
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Jun 3, 2010
How exactly do i do it, I can't find any clear step's on it?I got no CD-R's left and can't get to the shops.
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Mar 13, 2009
When I insert a USB thumb drive into a USB socket a "CD-ROM Disc" icon appears on the desktop. When I double-click on the icon I get a "CD/DVD Creator" window. Messages in "/var/log/messages" shows Vendor (Sandisk) and Model (Cruzer) for the USB thumb drive. Those are correct. But for Type it says CD-ROM. What's up with that?
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Oct 28, 2009
I have a Fedora box running a domain and a sub domain. It also is the mail server running Postfix and Dovecot. I have created a new user account in the Virtual Alias.conf file and run postfix reload.
"e.g [URL] admin_company"
This new account can send mail internally and externally but cannot receive mail internally and externally.
The error message internally is: 5.1.1 <admin@threadneedle.com.pg>: Recipient address rejected: User unknown in virtual alias table
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Sep 8, 2010
I just install Gnome live 5.0.6 on a USB thumb drive and would like to know how to save my setting?
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Dec 3, 2009
The following quote is the sad, sad story of a thumb drive with the partition table nuked, as told by a friend of mine:
Quote:
Data was recovered from an XP system by booting with a BartPC CD and copying onto a USB thumb drive. Nothing unusual.
System was rebooted into the XP install CD.
The first drive that was found was the 16gb thumb drive (AKA flash drive) and the person (re) installing XP didn't catch the fact that XP presented the 16gb thumb drive instead of the 160gb hard drive.
The drive partition function in XP deleted the partition table - on the thumb drive.
A freeware utility in Windows shows the data but can't recover the file names, so that everything is gobbledygook. Does anybody know of a utility or program under Linux that can help? I have a laptop running F 12 and can do the work if needed, but don't know what program to use.
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Nov 28, 2010
I am looking for OpenVMS distribution on a thumb drive for a PC. I image it would be a Linux system that automagicly starts a VAX simulator then boots OpenVMS on that. Either it would run live off of the thumb drive or it would install to the system's hard drive.
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Mar 27, 2010
I've just installed UNR version of Ubuntu on one of my thumb drives and was wondering what I needed to do to for making it have persistent changes? I've seen the different tools and the usb creator they have on Ubuntu already but I want to do it myself from scratch. What files do I need to edit to make the drive persistent? I made the bootable thumb drive using UNetbootin.
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Apr 6, 2010
i inserted a thumbdrive on one of the usb slots on my laptop upon inserting it shows:[sdb] Assuming drive cache: Write through[977.113519] sd 5:0:0:0: [sdb] Assuming cache: Write through
how to read the contents of my thumbdrive?Do i need to mount it first or what should be the procedure?
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Dec 4, 2010
I have a thumb drive that I cannot get a clean format done to use it as a boot device.Is there some way to do a lower level format (I am using Gparted) to get rid of this error?
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Jan 25, 2011
I want a USB drive for emergency situations. It will have sensitive information, family photos, etc. stored on it. I want it to have one encrypted portion (TrueCrypt) for the sensitive materials. I want the files to be able to be viewed on a Windows machine first and foremost. If no Windows machine is available I would like to have a bootable version of Ubuntu on the USB drive so I can boot it and also view the files.
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