Usb flash drive read only problem [solved]

Hi, im using spacefm, i have udevil and udisks2 installed, i can read my USB flash drive but i cannot delete files, i tried gparted that use spacefm as well and i can delete files from the usb flash drive with no problems, any ideas?
i solved i installed ntfs-3g and i can delete files again
thanks
Last edited by adcdam (2013-04-08 01:01:22)

I installed it and got this error : now my Macbook wont even see the flash drive...

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USB flash drive 'Read only' problem

Hi everyone,
I have a Trescend USB flash drive 16 Gb, and when I plug it into my desktop (using windows 7 64 bits) I'm able to write or read any file I want. When I plug it into my mid-2010 MacBook Pro 15' w/ lastest version of OS X Lion, the permission are 'Read Only' and I can't seem to be able to change the permission.
How am I suppose to change permission on my Macbook ?
Thanks in advance,
Cheers,
François

I installed it and got this error : now my Macbook wont even see the flash drive...

USB Flash Drive: Read-only filesystem

Hi
I'm trying to format a usb flash drive using various tools but they all say that it's a read-only file system. The drive is not mounted and I'm running as root. If I try to mount the drive like so with the command
sudo mount -o rw,users /dev/sdc1 /media/myflashdrive
I don't get any errors and when I go to /media/myflashdrive I can see and edit all the files (only as root however). However, any changes are not persistent. For example, if I delete any files or run
sudo rm -rf /media/myflashdrive/*
it seems to work and ls doesn't show anything, but then if a reopen the drive, the files are back.
I've tried this on other computers and even in Windows but nothing can put a scratch on it. I heard something about there being a certain bit in the first sector which can be flipped to make a drive read-only but I think it only applied to Windows.
Any advice would be greatly appreciated, but if I can't format the drive I'll probably use some thermite to toast the data on it.

Hmm. I wasn't very clear: my drive was usable originally but it stopped working while I was using Windows (I just plugged it in one day and it was read-only) and now that I use Linux I thought I'd try to fix it (I have been told that linux can do anything but I'm not so sure). I suppose it could just be a physical error on the drive but it's not got any marks or anything.
Just a thought here, if it was a physical problem, would it be possible to 'reset' it with an electromagnet or by shorting it out or would this just frazzle the chip? Maybe not the right forums for that kind of question.
Last edited by JJ.Eastwood (2011-05-26 19:50:56)

Why does my Macbook Pro make every flash drive read only?

Anybody else having this problem? I can write to a flash drive once on my Macbook Pro. After I remove it, it becomes read-only, but only on my Macbook (I still have read/write access on other computers). Happens with every flash drive, regardless of brand or size. File systems are all FAT 32.

I'd make a sound too if i was put into a bag haha.
Only thing i could think of it it has a mind of its own or your putting your computer to sleep. Try shutting down your mac before placing in your bag and see if that changes things.

USB Flash drive will only work on the Mac

I have a Toshiba 32 GB flash drive and tried to copy music to it. The music plays thru my Mac but when I put the drive into my Subaru or Sony amplifier I get the message that the drive is unrecognized. I tried to partition it with the same results. Is there a certain partition to use? I have tried all that were offered in Disc Utility.

From a subaru forum "Zero problems using 16gb SanDisk Cruzer USB 2.0 Flash drives in whatever head unit is in a non-nav"
It may depends what head unit you have, same for the sony amplifier, many units cannot read over 8 or 16gb, try a different / smaller usb and give it a go. Also maybe try formatting your stick at work or a friends computer to fat16

ExFat Flash Drive Read Only

I let a friend borrow my 64G Flash Drive and he returned it with a bunch of unwanted files. At first I tried deleting them but all I got was a dull "beep" so I figured I'd just erase the whole thing and reformat. Opened disk utility and it was recognized but the options to erase are greyed out. Looked at the drive's info and it says "Read Only".
I have Paragon's NTSF driver installed thinking that would cure the erase problem but that did nothing. I know no one with a Windows machine so I can't ask someone else to reformat the drive for me.
How do I get the Flash Drive out of read only, erase and reformat to Mac OS Extended (Journaled)?

I don't know anyone who uses Windows and took it to a Coffee House to ask if someone there would reformat it for me. Most of the time I got a 'no' fearing it may harm their systems (???) and those willing to had no idea how to perform a reformat. I figured it couldn't be that difficult on a Windows machine, there must be a disk utility somewhere on the system, but they wouldn't let me look or even try.
I did contact the manufacturer and was told the drive should work under OS X but they have never tested it and would not allow me to return it because the purchase date was beyond the 60-day warranty. I did tell them that I would alert the Mac community about the problem and suggest Mac users avoid PNY flash drives or other drives.
Because it was a 64G flash drive I paid a handsome price for it from Staples. I returned it to Staples and asked for my money back but again, according to my receipt, it was beyond their warranty period. Of course, they took me to the locked flash drive cabinet and suggested I purchase another brand but I was ticked and promised I would not buy another item from them.
I've asked the (former) friend who borrowed it to replace it with a different brand and mailed it to him because it contains all of his files. He has not responded thus far and I doubt that he ever will. Its too bad. I'll never loan another Flash Drive to anyone again, good friend or not.

Make flash drive read only with no copying

Here is the Situation. I have a 2h video of a high school play that i am editing and selling but with final cut you can only export 480 p video on dvd so i am going to sell hd digital copies on flash drives my question is can i make it so that the flash drive are read only and copy protected so it can't be distributed can i format the flahs drive insuch a way a way that prevents copying?

jfoppes wrote:
… can i format the flahs drive insuch a way a way that prevents copying?
technicallly, to playback you have to 'copy' content (from stick/disk/whatever to device) ....
So, the harder you make it to 'copy protect' your content, the more inconvenient it gets for your paying customers!
for example, on commercial DVDs I'm 'forced' to watch minutes of promos and 'legal advice', talking to me like I'm a 1st degree suspect No fun! And: When I like to watch/listen on diff. devices. again trouble to 'rip' it (anyone remembering the first slogan for iTunes? "Rip.Mix.Burn." Holy innocence ........... LOL
Forget the few copy-cats. Convince by quality (e.g. spelling ) .
Deliver an excellent product, perhaps bundled with some 'extras' (a nice designed box, with pics/t-shirt/memorabilia/…) And, hey - who copies a school-play????

Flash drive read only but in FAT32 format

I use my flash drive to house my itunes library but recently whenever I try to add a song to my itunes (and thus also copying that file to the drive) I get the error message that I don't have the privilege to copy to the drive. I checked to see what format it was and if that was the problem but it's still FAT32, as it always has been. Any insights?

does the flash drive have a hardware lock? some flash drives do. make sure it's not on. also, check that the folder you are trying to copy to is not locked. select that folder in finder and enter command+i. see if the locked box is checked in the popup.

External usb hard drive - read only

I connected an external hard drive to my macbook in hopes I would be able to use it for storage. I shows up and I can parse through all the files. When I try to add a file to a folder, it doesnt let me. Its says READ ONLY. I have never set any permissions. Any help on how I can fix this issue?

Select the drive on your desktop and hit command+i. This brings up an information panel.
At the bottom, click the lock and enter an admin username and password. Then, click the plus sign, choose the username you want to give read/write access to and select read/write. Then click the gear icon and select "Apply to enclosed items."
Cheers.

Ext4 flash drive partition permission problem (Solved)

I want to have a linux partition on flash drive which I can insert on any linux system and have it automounted and to have read and write permission so as to copy and transfer files. I tried ext4 partition but it is not allowing me write after automounting (I need to open thunar with sudo for writing). I do not want to use fat32 format. I tried searching for this in wiki/forums/web but mostly it is suggested to mount it manually for proper permissions. Is it possible to have the partition automounted with read/write permission for the default user? Can ext2/ext3 provide this facility? Thanks for your help.
Last edited by rnarch (2012-08-12 12:59:10)

well, the chown command makes it (presumably) your user as the owner, and then possibly the "user" group as the group owner. the chmod command then sets the permissions to 777 which is the same as setting it to ugo+rwx (user,group, and other add read, write and execute). So it should give correct permissions for access by anyone (hence other is given read write and execute permissions).
For access via same user, it is not the name, but rather the user id that is key. Same goes for group. For instance, on my machine, I previously dual booted with OSX, so in order to give mysefl access to my OSX partition without issue, I issued myself an UID of 501, which is where OSX starts issuing UID's. Whereas typically linux starts at 1000. But I can give mysefl any username I want as long as my uid matches.
Make sense?

External drives read only problem

iam a new mac user. i have 2 external drives formatted to ntfs that can only read. They are too large to transfer files to the mac to reformat to fat32. Any workaround suggestions?

yopadima wrote:
iam a new mac user. i have 2 external drives formatted to ntfs that can only read. They are too large to transfer files to the mac to reformat to fat32. Any workaround suggestions?
You can install NTFS3G, this will allow you to write to an NTFS drive

Copying files from iMac to USB flash drives

I am having problems copying files from my iMac computer to USB flash drives. Sometimes, I get the error message: "Sorry the operation could not be completed because an unexpected error occurred (Error Code -50)."
How can I solve this problem?
This error message does not happen everytime but rather occasionally. Most of the files I am trying to copy to my USB flash drives are MS Word documents. I have tried using various brands of flash drive, but I still get this error message.
I use my USB flash drives for both Mac and Windows OS computers. For my 2GB Kingston Data Traveller flash drive, I checked its product datasheet on the Kingston website, and it says that it is compatible with both Macintosh and Windows OS, and that I can use it for cross-platform PC/Mac file transfers.
I also checked the Properties tab for this flash drive, and the File System for the drive is listed as "FAT."

Hello Stedman:
I am pretty sure that these files were not open in MS Word when I tried to copy them.
I only get this error message/code for a handful of MS Word documents; the rest of my MS Word documents were copied successfully to my USB flash drive.

[Solved]USB Flash Drive inaccessible.

Hi there.
I have installed Arch Linux on my Sony laptop and I have configured it so that most stuff works. The only problem I'm facing now, is that my USB Flash Drive won't show up when I plug it in. I have tried restarting ehci service, but it does not solve anything. I had this problem many years ago with another computer running Linux, but I can't remember how it got solved. Connecting a USB-mouse works perfectly but not a flash drive. The drive is a FAT32 formatted Kingston.
This is my dmesg log:
[ 109.300651] usb 2-1.3: new high-speed USB device number 4 using ehci_hcd
[ 109.613294] Initializing USB Mass Storage driver...
[ 109.613459] scsi7 : usb-storage 2-1.3:1.0
[ 109.613577] usbcore: registered new interface driver usb-storage
[ 109.613579] USB Mass Storage support registered.
[ 110.614456] scsi 7:0:0:0: Direct-Access Generic Flash Disk 8.07 PQ: 0 ANSI: 2
[ 110.616674] sd 7:0:0:0: [sdc] 8237056 512-byte logical blocks: (4.21 GB/3.92 GiB)
[ 110.617821] sd 7:0:0:0: [sdc] Write Protect is off
[ 110.617835] sd 7:0:0:0: [sdc] Mode Sense: 03 00 00 00
[ 110.618550] sd 7:0:0:0: [sdc] No Caching mode page present
[ 110.618561] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 110.621899] sd 7:0:0:0: [sdc] No Caching mode page present
[ 110.621908] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 110.787723] sdc: sdc1
[ 110.880634] sd 7:0:0:0: [sdc] No Caching mode page present
[ 110.880647] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 110.880655] sd 7:0:0:0: [sdc] Attached SCSI removable disk
Running openbox with PCManFM. Any clues how to solve this?
Last edited by light (2013-03-17 21:26:26)

s1ln7m4s7r wrote:
For what i can see from the log there is no problem.
Have you tried to manually mount it? To see if it is a PCManFM issue. Also, have you checked this:
https://wiki.archlinux.org/index.php/PC … ge_devices
Hi.
I tried installing gvfs, apparently I uninstalled it for some reason before. But it did not help mounting the flash drive. So I tried mounting it manually and it worked (Yaay!). But it complained that my flash drive was not mentioned in fstab. So I looked in fstab and the only ones listed is my root partion "/" and "/home". So how do I add USB mounting to fstab? I'm a little bit confused.
And one off-topic question: Shouldn't my "/var" partion also be mentioned in fstab?
Thanks for helping me
Edit: This is how fstab looks right now
# /etc/fstab: static file system information
# <file system> <dir> <type> <options> <dump> <pass>
# /dev/sda2 LABEL=/
UUID=ed07bdb6-61c6-4cc7-b98d-122a869046f1 / ext4 rw,relatime,data=ordered 0 1
# /dev/sda4 LABEL=/home
UUID=7448100b-682b-430f-9e59-327ce6f9f22c /home ext4 rw,relatime,data=ordered 0 2
Last edited by light (2013-03-17 20:54:38)

[solved] Suddenly no permissions on specific USB flash drive

Hi,
since yesterday I can't delete or create new files on my primary USB flash drive.
I then tried my other USB drive and it works without a problem.
Both are from the same manufacturer and formated with the FAT16 file system. When I check the permissions of the files/folder I see myself as owner with read/write permissions on both drives.
the error message on the console is:
rm: cannot remove 'foo': Read-only file system
I'd really like to give you more information but honestly I don't know where to look since one works and the other suddenly stopped working.
\edit: Checked dmesg:
[ 769.912866] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 123716903)
[ 769.912871] FAT-fs (sdb1): Filesystem has been set read-only
Seems to be the problem. Any ideas?
Thanks in advance!
Last edited by Barghest (2012-06-20 07:06:48)

I wasn't aware that FAT filesystems had a concept of file permissions or ownership...
First of all, reboot if you recently updated your system. Because the linux package (the kernel) was also updated. Then install and use gparted to format the drive.

[SOLVED] Clone Archlinux to USB flash drive

Hello,
I want to clone an existing Archlinux installation (x86-64) from a hard drive to a 32 GB USB flash drive. I want to be able to boot from the USB stick on my Win7 labtop.
I already took some measures to prepare my hard drive (with gparted). After moving all movies, pics etc to external stores and shrinking the home drive (sda4), it now looks like this:
- sda1 Boot (small)
- sda2 Swap (small)
- sda3 Root ( ca.8GB)
- sda4 Home (ca. 22GB)
I tried to take an image of the entire hard-disk (ca. 250GB) with clonezilla and restore it to the USB flash drive, but got an error message - original disk to big (250GB vs 32GB), besides only ca 30GB of the 250GB being assigned to partitions.
Now I'm looking for a way to bring only the necessary partitions from the harddisk to the USB stick, hoping to have exactly the same Archlinux configuration as a bootable installation on the USB stick afterwards (bootable on a Win7 labtop ... and maybe from my main Archlinux machine too). There is a wiki article about the topic, but its rather about installing a fresh system than cloning an existing system. The related questions on the forum (searching in 'installation' for 'clone usb') did not answer my question.
Maybe somebody did successfully what I'm planning to do and can give me some tips?
Last edited by 4on6 (2012-04-16 12:57:01)

4on6 wrote:Create two new partitions - with gparted p.ej.? And do I have to worry about the filesystems - must they be the same like for the original partitions on my hard-disk?
I prefer Gparted, it's easy as cake
The filesystems don't have to be the same as the original partitions. I prefer ext4 (universally supported) or jfs (uses very little CPU), but I recommend you ext4.
In fact, you can use a hard drive instead of a flash drive and this is how you clone a Linux installation manually!
4on6 wrote:So I mount both - source and destination partitions (/mnt/dest/ suggests it ...)?
Yes. I mount the source partition in /mnt/source and the destination partition in /mnt/dest, and then I issue
rsync -av /mnt/source/ /mnt/dest
and wait for it to finish. Then I unmount the partitions and mount the other ones and repeat the same thing.
4on6 wrote:I create that /boot folder on the flash drives root partition, right? Won't that cause problems later on with rsync, when I update the installation and there is an additional folder on the target partition?
Since the root directory you'll aready copy on the flash disk won't have the /boot directory, simple do a
mkdir /mnt/dest/boot
while your destination partition is still mounted. Unmount the source root partition, mount the boot one and then type:
rsync -av /mnt/source/ /mnt/dest/boot
and GRUB and the kernel will be copied to the /boot folder on the destinaton partition on the flash disk.
Make sure that in /mnt/dest/etc/fstab you comment out the line for mounting the /boot partition, if any.
4on6 wrote:I've seen those UUIDs as output of a linux command (mount? fdisk?), but I don't recall which one - how do I get these UUIDs?
Use Gparted, right click any partition and click Information. In the window that appears, in the middle you can double-click the UUID and press Ctrl-C to copy it. Then you can paste it in the text editor and use it for /etc/fstab or /boot/grub/menu.lst. That's why I love Gparted for such stuff.
4on6 wrote:Do I send this command from the live Arch-CD, and is it the only command necessary (I have not much experience with grub)?
Yes, since Arch uses GRUB 1 on the installation CD you can uste the command I gave you to reinstall GRUB on the flash disk with the settings you already entered for the /boot/grub/menu.lst file.
Make sure you boot the CD in 64 bit mode if the Arch you installed is 64 bit. Just to be safe.
4on6 wrote:I will ...
Be very careful, I didn't and lost ALL my files by mistake in typing. Triple-check the directory you are currently working in! ALWAYS make a backup!
4on6 wrote:Great that this is possible, hope I manage to get it done. Thanks again.
You're welcome. Please inform me if this little tutorial suited you so I can make a wiki entry for it, if the admins allow.

Usb flash drive read only problem [solved]

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