HOWTO accesss USB memory key - comp.os.linux.misc

Patrick Guio <patricg@fys.uio.no> wrote: > I have just got a USB memory key or stick. I wonder how do I access this > device? You need USB support, USB mass storage, SCSI emulation and SCSI disk support. Then you'll see the USB stick as a SCSI disk. Davide -- | So what is the best way to protect yourself against the ILOVEYOU | virus? Install Linux. If that's not an option, try uninstalling | Windows. -- Geoff Johnson

On Fri, 9 Jan 2004, Davide Bianchi wrote: > Patrick Guio <patricg@fys.uio.no> wrote: > > I have just got a USB memory key or stick. I wonder how do I access this > > device? > > You need USB support, USB mass storage, SCSI emulation and SCSI disk > support. Then you'll see the USB stick as a SCSI disk. > Davide > Hi Davide, I have no experience with this kind of stuff. Could you detail what I have to do? So long here what I get when running lsmod|grep usb usb-storage 74656 0 scsi_mod 107544 5 [sg sr_mod ide-scsi usb-storage] hci_usb 9752 0 (unused) bluez 40260 1 [hci_usb] usb-uhci 26412 0 (unused) usbcore 79040 1 [usb-storage hci_usb hid usb-uhci ehci-hcd] Sincerely Patrick

Patrick Guio <patricg@fys.uio.no> wrote: > I have no experience with this kind of stuff. Could you detail what I have > to do? If this is your list of stuff, you should already have everything. dmesg | grep sd should show you which device is your USB stick. This is what I have on my system: # dmesg | grep sd SCSI device sda: 256000 512-byte hdwr sectors (131 MB) sda: Write Protect is off sda: sda1 UMSDOS 0.86k (compatibility level 0.4, fast msdos) So, my USB stick is /dev/sda. At this point you have to do just a mount -t auto /dev/sda /where/you/want/it/mounted And that should be it. Of course '/where/you/want/it/mounted' must exists! Davide -- | I have replaced NT with Linux. Linux -- heir of the byte that dogged | me. -- Allan Willis

On Fri, 9 Jan 2004, Davide Bianchi wrote: > > If this is your list of stuff, you should already have everything. > dmesg | grep sd should show you which device is your USB stick. > This is what I have on my system: > > # dmesg | grep sd > SCSI device sda: 256000 512-byte hdwr sectors (131 MB) > sda: Write Protect is off > sda: sda1 > UMSDOS 0.86k (compatibility level 0.4, fast msdos) > > So, my USB stick is /dev/sda. > At this point you have to do just a > mount -t auto /dev/sda /where/you/want/it/mounted > > And that should be it. Of course '/where/you/want/it/mounted' must > exists! > > Davide > Thanks Davide, I have actually two keys, one contains some DOS/vindoz data/progs (256MB). I can access it with type vfat: mount -t auto /dev/sda1 /mnt/memstick the other one is from DELL and completely new (128MB). I can mount it with mount -t auto /dev/sdb1 /mnt/memstick What is the difference between these two devices? Both type appear to be vfat. Can it be of other type? Do I have to format the new memory stick? How can I mount the key without being root and be able to write as my username and not root? Sincerely Patrick

Patrick Guio <patricg@fys.uio.no> wrote: > What is the difference between these two devices? ....you ask me? > Both type appear to be vfat. Usually they are. > the new memory stick? No, since isn't a real disk in there. > How can I mount the key without being root and be able to write as my > username and not root? Be sure that you own the directory where you want to mount the USB stick, and add the relevant line in your /etc/fstab, use the 'user' option and you are ready to go. Davide -- | If JavaScript is walking alone late at night through a bad part of | town with a pocket full of $20 bills, ActiveX is dropping your | trousers in the middle of the yard of a maximum-security prison, | bending over, and yelling 'Come and get it, boys!' --Adam | |

Patrick Guio <patricg@fys.uio.no> writes: > I have just got a USB memory key or stick. I wonder how do I access this > device? Do I have to mount something? I am running RH9 Short answer: try mounting /dev/sda1 as a vfat filesystem Long answer: The system will automatically recognize it as a SCSI hard drive, but as with all drives (CD's, floppies, etc) it has to be mounted as a filesystem before you can access the files on it. If you have no other SCSI disks on your machine, and this is the only USB drive you've plugged in since the machine last rebooted, your drive will almost certainly be /dev/sda. Unfortunately, in the general case it can be very difficult to know beforehand exactly what device it will be recognized as. If you look in /var/log/messages, you will see likes something like Jan 7 12:15:29 torus kernel: hub.c: new USB device 02:05.0-2.2, assigned addres s 4 Jan 7 12:15:29 torus kernel: scsi2 : SCSI emulation for USB Mass Storage device s Jan 7 12:15:29 torus kernel: Vendor: LEXAR Model: JUMPDRIVE Rev: 1.01 Jan 7 12:15:29 torus kernel: Type: Direct-Access ANSI SCSI revision: 02 Jan 7 12:15:29 torus kernel: Attached scsi removable disk sdb at scsi2, channel 0, id 0, lun 0 Jan 7 12:15:29 torus kernel: SCSI device sdb: 251904 512-byte hdwr sectors (129 MB) Jan 7 12:15:29 torus kernel: sdb: Write Protect is off The `sdb' tells you that the device is /dev/sdb, so can be mounted with a command like mount -t vfat /dev/sdb1 /mnt/key assuming that the drive has a single FAT partition (the destination directory /mnt/key has to exist or this command will fail). Before unplugging the drive, you should unmount it: umount /mnt/key or else you risk trashing the file system. This has to be done as root, which then means that the key drive can only be written to by root. To get round this you must add lines to the /etc/fstab file to allow other users to mount the drive, just as for other removable media. The situation can get rather complicated if you use more than one USB drive, especially if they have different filesystems or you want only some of them to be user mountable; do a Google Groups search on my email address and "key drive" for more info. -- Stephen Cornell cornell@zoo.cam.ac.uk Tel/fax +44-1223-336644 University of Cambridge, Zoology Department, Downing Street, CAMBRIDGE CB2 3EJ

Stephen Cornell <cornell@zoo.cam.ac.uk> writes: >Patrick Guio <patricg@fys.uio.no> writes: >> I have just got a USB memory key or stick. I wonder how do I access this >> device? Do I have to mount something? I am running RH9 >will be recognized as. Do (as root) " fdisk -l " before and after hot-plugging. There will be a difference indicating the new "partition" that you have to use in the mount-command. Greetings, Holger

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Fri, 9 Jan 2004 13:29:09 +0100, Patrick Guio <patricg@fys.uio.no> wrote: > On Fri, 9 Jan 2004, Davide Bianchi wrote: > > >> Patrick Guio <patricg@fys.uio.no> wrote: >> > I have just got a USB memory key or stick. I wonder how do I access this >> > device? >> >> You need USB support, USB mass storage, SCSI emulation and SCSI disk >> support. Then you'll see the USB stick as a SCSI disk. >> Davide >> > > Hi Davide, > > I have no experience with this kind of stuff. Could you detail what I have > to do? > So long here what I get when running lsmod|grep usb > Have you tried just plugging it in the USB port? -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQE//0lAd90bcYOAWPYRApScAKC6B173XnxFipWKQYHOa9n5kSlzpwCcCr9R 1qB8RWFQ2fOqZTgCGUqon1Y= =nsnm -----END PGP SIGNATURE----- -- Jim Richardson http://www.eskimo.com/~warlock Microsoft - because god hates us