Any storage device with a USB interface (USB stick, USB hard disk, …).

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37
votes
5answers
42k views

How to reconnect a logically disconnected USB device?

It is possible for a USB storage device to become logically disconnected: the device is still plugged in, but is invisible from the operating system (e.g. it's not listed under /proc/bus/usb). Maybe ...
22
votes
3answers
18k views

Why is my PC freezing while I'm copying a file to a pendrive?

I have a really strange situation here. My PC works fine, at least in most cases, but there's one thing that I can't deal with. When I try to copy a file from my pendrive, everything is ok -- I got ...
21
votes
8answers
33k views

Eject USB drives / eject command

I know that the eject command can be used to eject almost any hardware component attached, but can it be used to eject USB drives? Is it possible to eject USB drives and external HDD's with the eject ...
19
votes
3answers
51k views

How to umount a USB drive?

I want to know how to umount my USB drive via command line. I am using Ubuntu 12.04 LTS 32-bit.
18
votes
3answers
14k views

smartctl on external hdd inside ide-to-usb enclosure

I have a very old 2.5" IDE drive inside a USB enclosure that gives some buffer I/O error. I tried to use smartctl to see what SMART says about it, but I can't manage to make it work. Being root, if I ...
17
votes
4answers
27k views

How do I boot from a liveusb using qemu-kvm?

I am trying to get qemu-kvm to boot from my live usb stick. Is this possible?
15
votes
10answers
84k views

How to install CentOS 6 via USB mass storage device?

I want to install CentOS 6.2 on a laptop (Thinkpad R40) which comes without CD/DVD-drive but with USB 2.0 ports. It seems that CentOS does not provide ready-to-use dd-able USB images for ...
15
votes
2answers
14k views

How to re-mount a USB stick after unmounting from Nautilus without disconnecting it?

I find that in order to re-mount a USB stick, I have to physically disconnect it, and then re-connect it. How can I do this without such tiring physical action?
13
votes
1answer
940 views

Why does Linux use SCSI drivers for non-SCSI devices? [duplicate]

Looking at what block device commands like lsblk or blkid return it seems that linux HDD support SCSI drivers regardless of the type of the devices, like a USB flash driver that is presented as ...
12
votes
1answer
253 views

Disks (in usb enclosure) keep waking up even when not mounted

Setup I have USB enclosure (Buffalo DriveStation Quad) containing four drives connected to my nas server (ubuntu server 14.04). The enclosure is configured to JBOD mode, so I'll see all the disks in ...
11
votes
5answers
46k views

How to salvage an unreadable usb flash drive

I have a 16GB USB flash drive that somehow got corrupted to the point in which even fdisk -l can't find it (I get a one-line error message saying: "Unable to open /dev/sdc") However, it is being ...
11
votes
3answers
12k views

Slow performance when copying files to and from USB devices

When I copy files to and from USB devices (camera, HDD, memory card) my system becomes very slow. For example if I want to close a window I move the mouse but it takes about 2 seconds or more before ...
11
votes
2answers
26k views

Mounting USB drive that is not recognized

Using Arch Linux / XFCE, I frequently have problems with USB drives that are not properly mounted. Sometimes they automatically show up in Thunar and I can mount them with one click. However, at other ...
10
votes
2answers
558 views

Unable to copy large file onto ext2 usb stick [closed]

I have an 8G usb stick (I'm on linux Mint), and I'm trying to copy a 5.4G file into it, but getting No space left on device The filesize of the copied file before failing is always 3.6G An output ...
9
votes
2answers
8k views

USB drive permissions when automounting

On Debian there is the common problem, that you try to plug an ntfs formatted USB harddrive and then can't write to it as a regular user to it because the directory belongs to root. A little time ago ...
8
votes
1answer
39k views

Remove USB flash-drive write-protection

I have a sports-watch which has an integrated flash-memory. This flash-memory is used to store training information. When I connect the watch to my computer using the USB cable, it's detected as ...
7
votes
3answers
6k views

How to remove a USB drive without worrying if its been unmounted?

Sometimes I unplug my usb drive only to find out files were not written to it. I suppose the only way to ensure files are written to it is to right click on the USB drive on the desktop and then ...
7
votes
5answers
20k views

Ubuntu 13.04 does not recognize USB drive

Using Ubuntu 13.04 (with Gnome 3), my new USB stick (details see dmesg/lsusb) doesn't show up automatically. Situation: The drive does not show up at fdisk -l The drive does appear when running ...
6
votes
2answers
110 views

Why does it take so long to detect an usb stick?

I'm writing an initramfs-script and want to detect usb-sticks as fast as possible. When I insert an usb 2.0 stick, the detection of idVendor, idProduct and USB class happens within 100 ms. But the ...
6
votes
1answer
2k views

Find out if a specific device is an USB mass storage

Context I'm automating SD card imaging from an existing dd factory image. The SD card is always connected through an external USB card reader and thus appears in the system as a SCSI block device ...
6
votes
1answer
6k views

Why can I not see some files in my USB stick on Windows that I can see on Linux?

I'm having a little problem with my USB stick. There are files and folders on the USB stick I can see and manipulate on my Linux machine (Fedora 20) but some of those files and folders appear nowhere ...
6
votes
2answers
10k views

How to avoid powering down certain USB devices when a machine is suspended

I'd like to maintain power supply to a USB-powered drive when the system goes into suspend (AKA S3 or "suspend-to-RAM") mode. Normally the power is cut while the machine is suspended, which causes it ...
6
votes
1answer
10k views

Pen Drive Not detected in Linux

I inserted a new pendrive. The following is the dmesg output: [127321.248105] usb 2-2: new high speed USB device using ehci_hcd and address 9 [127321.380898] scsi11 : usb-storage 2-2:1.0 ...
6
votes
2answers
1k views

Exposing NFS mount via USB

I know enough linux to be dangerous - apologies if my terminology is incorrect. I have an electronic drumkit that has USB into which I can plug a flash drive with MP3s on it. The drumkit has no ...
6
votes
1answer
536 views

Can I make a USB port on my Linux computer look like a mass storage device?

I'm running Kubuntu 12.04 on my PC. I want to make one USB port on my computer appear as if it is a USB mass storage device to other devices. In other words, something connected to this USB port will ...
5
votes
3answers
8k views

How can I create a udev rule to mount a USB drive read only?

I'm trying to set a particular USB drive to always mount read only. If I plug it in, it is seen as sdb with a single partition, sdb1. Here are some relevant udevadm lines (not the entire output of ...
5
votes
1answer
25k views

How to format USB drive in Linux Mint 14 with GUI? [duplicate]

I'm new to Linux Mint and I've just installed Linux Mint 14. Now I need to format my USB drive, but I'm not getting any option to do that. Please suggest me anyone, how can I do that with a GUI?
5
votes
2answers
3k views

Files copied to flashdrive only on unmount

I use Debian wheezy with KDE4. Most of the time when I copy something to a flashdrive, the write does not actually take place until I unmount. This even happens with relatively large amounts of data ...
5
votes
2answers
11k views

Unable to mount volume, an operation is already pending (with multiple users)

I'm running Linux Mint 14 - pretty much whatever the default install settings are. When I have multiple users logged in and I plug in a flash drive, or digital camera, or any other USB storage, rather ...
5
votes
1answer
2k views

Problems copying large files to USB drive

I've got some issues when copying larger files to my USB drive. First of all, my system stopped recognizing my USB drives automatically. I now have to run modprobe usb-storage in order for my USB ...
5
votes
1answer
124 views

USB drive offline in dmesg and ? in ls, but only for some files?

I have a backup drive that has been intermittently failing (but almost always succeeding) to run rsnapshot lately. ls and e2label output are not encouraging: $ ls -al /mnt/backup/ ls: cannot access ...
5
votes
1answer
170 views

How do I temporarily extract a flash drive or HDD in Linux?

Suppose I mounted a disk in this way: mount /dev/sdb /mnt/tmp I have some files opened on this filesystem and don't want to unmount it. However I want to temporarily extract the device, then ...
5
votes
4answers
3k views

Why is writing SLOW on raw device, and FAST on filesystem (USB key)?

I have a USB key (PQI U822V-Speedy 32G) that I am trying to benchmark quick'n'dirty on Linux. I'm testing write bandwith. dd on raw partition I created a partition starting at sector 2048, then did ...
4
votes
3answers
5k views

Automount external storage as user readable and writable in Debian XFCE?

I have Debian Wheezy installed with the latest XFCE desktop environment. In the XFCE settings, I specified that external media be automounted upon insertion. However, when I plug in my USB stick, it ...
4
votes
1answer
141 views

Adding efficient storage to a laptop-based system

I've recently asked an as-yet-unanswered related question. My question here is a bit different: I want to know the best way to add storage to a laptop-based system without sacrificing power ...
4
votes
2answers
225 views

how to execute a script everytime any USB get mounted

I use a script that writes all mountpoints of my devices to a textfile using df. How can I execute my script everytime any device (especially USB) is mounted? script to execute: #!/bin/bash # save ...
4
votes
2answers
2k views

USB storage devices aren't automatically mounted when inserted on a fresh install of Debian 6.0

I installed Debian 6.0 (squeeze) a few days ago on my machine. I installed the default GNOME desktop, standard settings. Unfortunately, I just noticed that when I plug in USB storage devices (external ...
4
votes
1answer
252 views

Debian stretch asks for root password in order to mount usb disks after upgrade

After apt-get upgrade && apt-get dist-upgrade, Debian Stretch started to ask for root password for external usb disks. Creating a /etc/polkit-1/localauthority/50-local.d/55-usb-mount.pkla ...
4
votes
0answers
140 views

Usb drive not detected /arch

I have this USB drive that doesn't seem to be detected neither on lsblk or fdisk. Here are some outputs: Dmesg: [93812.546850] usb 2-1.2: new high-speed USB device number 33 using ehci-pci ...
4
votes
0answers
215 views

automatic disconnection of RAID array

A RAID array connected to my system (Debian 7) via USB frequently disconnects itself for no apparent reason. Upon initial connection to the system, the device is detected, and the array can be ...
3
votes
1answer
410 views

How to differentiate USB flash drive and CD-ROM?

I want to differentiate an USB flash drive and a CD-ROM. My requirement is when I connect to a system only the CD-ROM should work, but not the USB key.
3
votes
3answers
3k views

How to repartition pendrive again?

My 8GB pendrive originally contained only a FAT partition, but I tried to install OpenSUSE 11.4 on it. I created a 200MB partition for /boot and the rest was for the root partition. Despite the ...
3
votes
4answers
1k views

Create own Linux OS on USB Flash drive

Is it possible to create your own Linux OS right onto a USB drive? I know you can just download a Linux distro onto a USB thumbdrive and plug it into a computer and run it from the USB, but I'd like ...
3
votes
2answers
653 views

mount is not executed when called by udev

I tried to create some udev rules to mount and unmount my USB flash drives; the rules for the moment are very simple: ACTION=="add",KERNEL=="sd[b-z]",RUN+="/root/scripts/plug_flash_drive.sh %k" ...
3
votes
3answers
949 views

Removable USB stick listed as non-removable in /sys/block?

In my question Bash script to output path to USB flash memory stick I got stuck on a problem nobody else seems to be having. (The issue also impedes my desire to use this answer: ...
3
votes
3answers
10k views

What is the service that's responsible for automounting a USB drive in CentOS 6.4?

I know of the legacy Linux way of mounting a USB stick or drive: mount /dev/sdb1 /mnt/ But in some CentOS 6.x installations I saw, you just insert the USB stick and CentOS automagically mounts it, ...
3
votes
2answers
10k views

How to auto-sync with a plugged-in USB mass storage device?

I have (at the moment) three mobile USB mass storage devices (flash drive, phone, e-reader). I'd like to always have the latest versions of all my files with me (such as CV, passport, research papers, ...
3
votes
3answers
1k views

USB external drive not working

I have an external usb drive that is not working properly: Jun 13 10:36:38 sleipneir kernel: [ 1022.548241] usb 1-3.1: new high speed USB device using ehci_hcd and address 28 Jun 13 10:36:38 ...
3
votes
1answer
6k views

My VirtualBox Virtual Machine doesn't detect my USB attached disk

I'm using the latest version of both Virtual Box (4.1) and CentOS (6.2). I would like my Western Digital USB drive to be recognized by my VirtualBox guest operating system. My host system, Windows ...
3
votes
1answer
381 views

Pluggin a bunch of USB hard drives into a Linux system?

I've got a Linux system with two USB 2.0 ports and one USB 3.0 port, and I would like to know how many USB hard drives I could plug into it. On the performance side, what would the I/O access be like ...