Re: usb disk insists on being readonly
- From: Matt Giwer <jull43@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 04 Jul 2007 23:14:37 -0400
lalawawa wrote:
On Jul 4, 5:53 pm, Matt Giwer <jul...@xxxxxxxxxxxxxxxxxxxxxxx> wrote:lalawawa wrote:Hi, I just bought a 400Mbyte usb disk.What kind of filesystem did you put on it when you formatted it?
My OS is Ubuntu version 5, I've recently done the updates to it.
My computer is a Sony VAIO PCV-RX270DS that I bought in 2001, with
about 400Mbytes of disk and the usb port is USB 1 (that manual doesn't
say which USB version because I think USB 2.0 wasn't out yet). The
disk is connected through a hub.
The drive is a 400GB Simpletech drive. The specifications make it
clear it's USB 1.1 compatible. All the online technical support
assumes you're on Windows.
When I turn on the disk, it appears in the /media directory by the
filename ' simpletech ' (not spaces before and after the name). The
fstab entry that appears is
/dev/sda /media/usb0 auto rw,user,noauto 0 0
If I cd to /media and do 'ls -ld \ simpletech\ ', I get
dr-x------ 1 wulluw wulluw 4096 2007-02-20 10:25 simpletech
if I go into that directory and do 'ls -la' I get
total 8
dr-x------ 1 wulluw wulluw 4096 2007-02-20 10:25 .
drwxr-xr-x 7 root root 4096 2007-07-04 14:20 ..
dr-x------ 1 wulluw wulluw 0 2007-02-20 10:25 System Volume
Information
if I try 'touch a' it says
touch: cannot touch `a': Read-only file system
if I try 'sudo touch a' it still says
touch: cannot touch `a': Read-only file system
I cd back to /media
$ chmod +w \ simpletech\ /
chmod: changing permissions of ` simpletech /': Read-only file system
$ sudo chmod +w \ simpletech\ /
chmod: changing permissions of ` simpletech /': Read-only file system
Why is it saying the filesystem is readonly when /etc/fstab clearly
says it's rw? What do I have to do to get the disk mounted rw? A
400GB readonly disk with nothing on it isn't very useful.
Any help would be appreciated.
I did not format the drive. I just bought it, brought it home,
plugged it into the USB hub and turned it on.
How would I go about formatting the drive? I would want the drive to
be also readable if I hook it up to a windows machine.
If you did not format it the best you might have is a Windows file system so it can advertise plug-n-play. If it has no filesystem then you obviously cannot write to it.
What I believe to be a complete description is here.
http://www.giwersworld.org/computers/linux/usb-drives.phtml
The general format command is this. It may be a place other than sbin on Ubuntu.
/sbin/mke2fs -c -j -L 320 /dev/sdX1
Read the article to figure out what X should be. It's easy.
I want to make the article complete so let me know how it goes.
If you want it readable by Windows you will have to create a windows file system on it with windows and set your fstab entry to mount it as vfat or whatever. I have not done that in so long I do not remember how to do it. If you just want primitive access google for a program something like lnxread.exe or lxread.exe which will copy a file from an ext2 or 3 partition to vfat.
If it was advertised as plug-n-play it should have come with a Windows file system.
--
The only way to get to the bottom of the Valerie Plame outing is to torture
Libby until he tells all. The identity of our spies is a matter of national
security.
-- The Iron Webmaster, 3813
nizkor http://www.giwersworld.org/nizkook/nizkook.phtml
Blame Israel http://www.ussliberty.org a10
.
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- From: lalawawa
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- From: Matt Giwer
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