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Old 10-09-2012, 05:14 AM   #1
Registered: Aug 2010
Location: Zhongli, Taoyuan
Distribution: slackware, windows, debian (armv4l GNU/Linux)
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udev changed from sdh1 to sdb1

Hi, I have an usb flash disk that is usually mounted at /dev/sdf1 when plugged in (cause b-e are used up by internal card reader). But if the flash disk is plugged in before boot, it is mounted at /dev/sdb1. How do I use udev rules to force the internal card reader at b even when other stuff are plugged in before boot.

ted:$ udevadm info -q path -n /dev/sdc
ted:$ udevadm info -q path -n /dev/sdd
ted:$ udevadm info -q path -n /dev/sde
ted:$ udevadm info -q path -n /dev/sdf

Last edited by ted_chou12; 10-09-2012 at 05:21 AM.
Old 10-10-2012, 02:13 AM   #2
Didier Spaier
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Location: Paris, France
Distribution: Slint64- on Lenovo Thinkpad W520
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As I am a bit lazy I would simply insert a line for it in /etc/fstab, identifying it by UUID. The "blkid" command will tell you its UUID. According to "man fstab":
Instead  of  giving  the device explicitly, one may indicate the
              (ext2 or xfs) filesystem that is to be mounted by  its  UUID  or
              volume   label   (cf.    e2label(8)  or  xfs_admin(8)),  writing
              LABEL=<label>   or   UUID=<uuid>,    e.g.,    `LABEL=Boot'    or
              `UUID=3e6be9de-8139-11d1-9106-a43f08d823a6'.  This will make the
              system more robust: adding or removing a SCSI disk  changes  the
              disk device name but not the filesystem volume label.

              Note that mount(8) uses UUIDs as strings. The string representa‐
              tion of the UUID should be based on lower case characters.


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