Mounting External Drive

gjblackford · 09-30-2007, 03:10 PM

Hi,

I am trying to setup an FStab entry to mount a drive to a particular mount point and I dont want to use /dev/ as the sdbx no can change depending if another device is attached to the machine, so I have been looking at SSID, and have so far done the following

List of devices attached to machine sdb1 is the device I want to attach by SSID

Code:

lrwxrwxrwx 1 root root 10 2007-09-30 10:26 0E4E-05D0 -> ../../sda1
lrwxrwxrwx 1 root root 10 2007-09-30 10:26 10b3cbf0-3504-4060-ac5a-ee077fc05f55 -> ../../sda3
lrwxrwxrwx 1 root root 10 2007-09-30 10:26 1f563aca-3504-4e15-ae4a-94f763b14395 -> ../../sda4
lrwxrwxrwx 1 root root 10 2007-09-30 10:26 50a05161-b06f-4d12-88a1-101731b18a9e -> ../../sda2
lrwxrwxrwx 1 root root 10 2007-09-30 10:07 511bf33e-cf5d-4110-a6f3-8f9157d582de -> ../../sdb1

FStab Entry

Code:

UUID=511bf33e-cf5d-4110-a6f3-8f9157d582de /media/Fomalhaut auto users,atime,noauto,rw,dev,exec,suid 0 0

Only problem is that when I try to mount the drive a normal user gets a "Permission Denied" error message, if I use the System Settings/Disk & File Systems (Administrator) to Enable the drive it works fine, so it looks like the entry is correct only problem is for some reason a normal user cant mount the drive.

Does anyone have any ideas what I can change or an alternatives to mount the drive without using /dev/sdb1.

Thanks,

Gavin,

alunduil · 09-30-2007, 03:17 PM

Are you using udev? If so change your udev rules to account for the information on the drive you want, and give it a secondary name that you know will not change upon a reconnect of the drive. Then use that name to do all your mounting.

Regards,

Alunduil

gjblackford · 09-30-2007, 03:36 PM

I don't know all I know is that I formatted the drive as Ext3

alunduil · 09-30-2007, 03:50 PM

Do you know the version of your kernel? If not the following will let you know:

Code:

uname -a

If it is 2.6 you are using udev, and then it's a matter of modifying the rules to do what you want. A good how to on this is located at: http://gentoo-wiki.com/HOWTO_Install...Configure_UDEV. Just adapt this to your needs, and it should work.

Regards,

Alunduil

gjblackford · 09-30-2007, 04:21 PM

Thanks, I am running kernel 2.6.20-16-generic. I have looked at the link you sent, but it seems to be aimed at setting up a Digital Camera and not a HD, and I think I need to change a few more entries in the line to be added to 10-local.rules, I have included below the output I get from entering udevinfo -a -p /block/sdb/sdb1

Code:

Udevinfo starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/block/sdb/sdb1':
    KERNEL=="sdb1"
    SUBSYSTEM=="block"
    DRIVER==""
    ATTR{stat}=="     393     2094  5835355 46682840"
    ATTR{size}=="781417602"
    ATTR{start}=="63"
    ATTR{dev}=="8:17"

  looking at parent device '/block/sdb':
    KERNELS=="sdb"
    SUBSYSTEMS=="block"
    DRIVERS==""
    ATTRS{stat}=="     263      163     2358     2708  1565315  4270039 46682776  1811936        1  1793904  1814260"
    ATTRS{size}=="781422768"
    ATTRS{removable}=="0"
    ATTRS{range}=="16"
    ATTRS{dev}=="8:16"

  looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb5/5-3/5-3.1/5-3.1:1.0/host4/target4:0:0/4:0:0:0':
    KERNELS=="4:0:0:0"
    SUBSYSTEMS=="scsi"
    DRIVERS=="sd"
    ATTRS{ioerr_cnt}=="0x0"
    ATTRS{iodone_cnt}=="0x17e391"
    ATTRS{iorequest_cnt}=="0x17e392"
    ATTRS{iocounterbits}=="32"
    ATTRS{timeout}=="30"
    ATTRS{state}=="running"
    ATTRS{rev}=="WQ10"
    ATTRS{model}=="HD400LD         "
    ATTRS{vendor}=="SAMSUNG "
    ATTRS{scsi_level}=="3"
    ATTRS{type}=="0"
    ATTRS{queue_type}=="none"
    ATTRS{queue_depth}=="1"
    ATTRS{device_blocked}=="0"
    ATTRS{max_sectors}=="240"

  looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb5/5-3/5-3.1/5-3.1:1.0/host4/target4:0:0':
    KERNELS=="target4:0:0"
    SUBSYSTEMS==""
    DRIVERS==""

  looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb5/5-3/5-3.1/5-3.1:1.0/host4':
    KERNELS=="host4"
    SUBSYSTEMS==""
    DRIVERS==""

  looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb5/5-3/5-3.1/5-3.1:1.0':
    KERNELS=="5-3.1:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb-storage"
    ATTRS{modalias}=="usb:v07ABpFCFEd0001dc00dsc00dp00ic08isc06ip50"
    ATTRS{bInterfaceProtocol}=="50"
    ATTRS{bInterfaceSubClass}=="06"
    ATTRS{bInterfaceClass}=="08"
    ATTRS{bNumEndpoints}=="02"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bInterfaceNumber}=="00"

  looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb5/5-3/5-3.1':
    KERNELS=="5-3.1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{serial}=="01BC0E47003A"
    ATTRS{product}=="Freecom Hard Drive"
    ATTRS{manufacturer}=="Freecom"
    ATTRS{maxchild}=="0"
    ATTRS{version}==" 2.00"
    ATTRS{devnum}=="15"
    ATTRS{speed}=="480"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceClass}=="00"
    ATTRS{bcdDevice}=="0001"
    ATTRS{idProduct}=="fcfe"
    ATTRS{idVendor}=="07ab"
    ATTRS{bMaxPower}=="500mA"
    ATTRS{bmAttributes}=="c0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{configuration}==""

  looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb5/5-3':
    KERNELS=="5-3"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{product}=="USB2.0 Hub"
    ATTRS{maxchild}=="4"
    ATTRS{version}==" 2.00"
    ATTRS{devnum}=="13"
    ATTRS{speed}=="480"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bcdDevice}=="0702"
    ATTRS{idProduct}=="0606"
    ATTRS{idVendor}=="05e3"
    ATTRS{bMaxPower}=="100mA"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{configuration}==""

  looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb5':
    KERNELS=="usb5"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{serial}=="0000:00:1d.7"
    ATTRS{product}=="EHCI Host Controller"
    ATTRS{manufacturer}=="Linux 2.6.20-16-generic ehci_hcd"
    ATTRS{maxchild}=="8"
    ATTRS{version}==" 2.00"
    ATTRS{devnum}=="1"
    ATTRS{speed}=="480"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bcdDevice}=="0206"
    ATTRS{idProduct}=="0000"
    ATTRS{idVendor}=="0000"
    ATTRS{bMaxPower}=="  0mA"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{configuration}==""

  looking at parent device '/devices/pci0000:00/0000:00:1d.7':
    KERNELS=="0000:00:1d.7"
    SUBSYSTEMS=="pci"
    DRIVERS=="ehci_hcd"
    ATTRS{msi_bus}==""
    ATTRS{broken_parity_status}=="0"
    ATTRS{modalias}=="pci:v00008086d000027CCsv00001025sd00000094bc0Csc03i20"
    ATTRS{local_cpus}=="ff"
    ATTRS{irq}=="21"
    ATTRS{class}=="0x0c0320"
    ATTRS{subsystem_device}=="0x0094"
    ATTRS{subsystem_vendor}=="0x1025"
    ATTRS{device}=="0x27cc"
    ATTRS{vendor}=="0x8086"

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""

Thanks,

Gavin,