Testing changes to fstab
Rick Sewill
rsewill at gmail.com
Thu Dec 16 06:59:58 UTC 2010
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On 12/15/2010 07:29 PM, Robert Moskowitz wrote:
> A long time ago I got burned with a type in /etc/fstab and back then I
> was told how to test out changes to fstab.
>
> Well I just added my USB drive to fstab and want to make sure I got it
> right. The line I added is:
>
> /dev/sdb1 /media/usbdrive ext4 defaults 1 2
>
> I figure this out from the fstab man page and that the following works:
>
> mount /dev/sdb1 /media/usbdrive
>
> But I want to test first before I reboot. BTW, the messages I now get
> for this drive during boot are:
>
> Dec 15 19:56:06 homebase kernel: usb 1-2: New USB device found,
> idVendor=0bc2, idProduct=3300
> Dec 15 19:56:06 homebase kernel: usb 1-2: New USB device strings: Mfr=1,
> Product=2, SerialNumber=3
> Dec 15 19:56:06 homebase kernel: usb 1-2: Product: Desktop
> Dec 15 19:56:06 homebase kernel: usb 1-2: Manufacturer: Seagate
> Dec 15 19:56:06 homebase kernel: usb 1-2: SerialNumber: 2GHJTCB4
> Dec 15 19:56:06 homebase kernel: usb 1-2: configuration #1 chosen from 1
> choice
>
> Oh, and I used e2label to label the partition the same as its serial #).
>
>
A suggestion please.
Instead of using "/dev/sdb1" in /etc/fstab, can you use either,
UUID=uuid-for-the-partition or LABEL=label-for-the-partition?
I speak from personal experience.
At one time, I tried using "/dev/sdf1" for a usb drive.
Then I added another usb device.
Depending how usb devices were discovered,
my usb drive wasn't /dev/sdf1 any more.
When the device is plugged in, even if the device is not mounted,
can you check "ls -l /dev/disk/by-uuid" or "ls -l /dev/disk/by-label"
to learn the uuid or label for the usb drive, respectively?
Since you stated you labeled the partition, 2GHJTCB4,
you should be able to do, in your /etc/fstab,
LABEL=2GHJTCB4 /media/usbdrive ext4 defaults 1 2
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