Howto: USB-Stick mounten mit Gentoo

Inhaltsverzeichnis

1 Kernel Konfigurieren
2 Loggfiles überprüfen
3 USB Stick mounten
4 /etc/fstab editieren
5 Adding symlink via udev

Kernel Konfigurieren

Zuerst erstmal checken ob der Kernel ok ist.

Datei: Kernel 2.4

SCSI support  --->
    <*> SCSI support
    --- SCSI support type (disk, tape, CD-ROM)
    <*>   SCSI disk support
File systems --->
    <*> DOS FAT fs support
    <*>   MSDOS fs support
    < >     UMSDOS: Unix-like file system on top of standard MSDOS fs
    <*>   VFAT (Windows-95) fs support 
USB support --->
    <*> Support for USB 
    <*>   UHCI (Intel PIIX4, VIA, ...) support 
    <*>   OHCI (Compaq, iMacs, OPTi, SiS, ALi, ...) support 
    <*>   USB Mass Storage support

Loggfiles überprüfen

wenn der Kernel nach den Reboot beim einstecken des Sticks etwas in dieser Art anzeigt ist alles ok:

tail -f /var/log/messages

tail -f /var/log/messages
Feb 26 00:00:01 gentoo /usr/sbin/cron[14320]: (root) CMD (rm -f /var/spool/cron/lastrun/cron.hourly)
Feb 26 00:17:53 gentoo usb 2-1: USB disconnect, address 2
Feb 26 00:17:56 gentoo usb 2-1: new full speed USB device using address 3
Feb 26 00:17:56 gentoo scsi1 : SCSI emulation for USB Mass Storage devices
Feb 26 00:17:57 gentoo Vendor: GENERIC   Model: USB Disk 2.0      Rev: U204
Feb 26 00:17:57 gentoo Type:   Direct-Access                      ANSI SCSI revision: 02
Feb 26 00:17:57 gentoo USB Mass Storage device found at 3
Feb 26 00:17:57 gentoo scsi.agent[22536]: disk at /devices/pci0000:00/0000:00:11.3/usb2/2-1/2-1:1.0/host1/1:0:0:0
Feb 26 00:17:57 gentoo SCSI device sda: 253952 512-byte hdwr sectors (130 MB)
Feb 26 00:17:57 gentoo sda: assuming Write Enabled
Feb 26 00:17:57 gentoo sda: assuming drive cache: write through
Feb 26 00:17:57 gentoo SCSI error: host 1 id 0 lun 0 return code = 8000002
Feb 26 00:17:57 gentoo  Sense class 7, sense error 0, extended sense 7
Feb 26 00:17:57 gentoo sda: sda1
Feb 26 00:17:57 gentoo Attached scsi removable disk sda at scsi1, channel 0, id 0, lun 0

USB Stick mounten

Probehalber mal den Stick mounten:

mkdir /mnt/usbstick
mount -t vfat /dev/sda1 /mnt/usbstick

/etc/fstab editieren

Damit der Stick auch nach einem reboot gemountet wird, muss man in der /etc/fstab noch einen Eintrag hinzufügen.

Datei: /etc/fstab

/dev/sda1               /mnt/usbstick  vfat            noauto,user,exec        0 0

Adding symlink via udev

Using udev, you can make sure that no matter what order you plugin usb drives, it always is at /dev/usbdrive (or whatever you want)

First, find the ID of your usb drive by using /sys: (assuming the device is currently in /dev/sda)

udevinfo -a -p `udevinfo -q path -n /dev/sda`

or better

udevinfo -a -p `udevinfo -q path -n /dev/sda` | grep SYSFS{serial}

One of the values that gets outputed, atleast on my device is 'SYSFS{serial}="0402170100000020EB5D00000000000"'. We can use serial numbers like this to make rules in udev, so make a /etc/udev/rules.d/10-local.rules if you don't already have one, and put a line similar to this:

Datei: /etc/udev/rules.d/10-local.rule

 BUS="usb", SYSFS{serial}="0402170100000020EB5D00000000000", KERNEL="sd?1", NAME="%k", SYMLINK="usbdrive"

Now, accoding to this example, that usb drive should always show up in /dev/usbdrive (feel free to modify the rule if you have multiple partitions on your drive).