Re: Which device assigned to removable media

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On 05/03/2010 06:28 PM, g wrote:
> Geoffrey Leach wrote:
> <snip>
>
>   
>> My original post was somewhat unclear. The question was which device is 
>> assigned to the disk when it's plugged in so I can know which device to 
>> mount.
>>
>> It appears that if I look at /dev/disk/by-label, the device name -- 
>> Sansa\x20e250 for example, is a symbolic link to the device -- ../../
>> sdb1 for example. I can then mount /dev/sdb1.
>>     
> so what happens when you use commands 'df' or 'mount'?
>
> i do not have an eSATA drive to check with, but i do know that when plug
> in a usb memory stick, i get following.
>
> +++
> $ mount|grep /dev|sort
> /dev/hda1 on / type ext3 (rw)
> /dev/hda3 on /home type ext3 (rw)
> /dev/hdb6 on /hd/b/06 type ext3 (rw)
> devpts on /dev/pts type devpts (rw,gid=5,mode=620)
> /dev/sde on /media/disk type vfat
> (rw,noexec,nosuid,nodev,noatime,uid=500,utf8,shortname=lower)
> tmpfs on /dev/shm type tmpfs (rw)
>
> $ df|sort
> /dev/hda1              8076508   3842888   3816736  51% /
> /dev/hda3             10721904   6261968   3906500  62% /home
> /dev/hdb6              4814936    140776   4429572   4% /hd/b/06
> /dev/sde                254218      3208    251010   2% /media/disk
> Filesystem           1K-blocks      Used Available Use% Mounted on
> tmpfs                   192676         0    192676   0% /dev/shm
> +++
>
>
> therefore, i tend to presume that if you set up your eSATA drive in
> '/etc/fstab' for auto mount and connected it, then 'mount' and 'df'
> should show you your eSATA drive.
>
> as i said, i do not have a eSATA to try and i may be wrong.
>
> [and yes, i am not currently under f12. having too many problems with
> kde at this time.]
>
>   
As Geoff said previously, if you use /dev/disk/by-label in fstab, then
it does not matter where the disk is inserted in relation to the other
drives. Since eSata drives may be hot pluggable, this is the best option
as the physical device (/dev/sdx) may change. Additionally, the newer
Linux releases now use the SCSI designation, even for IDE drives so you
should not see and /dev/hdx designations any longer.

-- 
Jerry Feldman <gaf@xxxxxxx>
Boston Linux and Unix
PGP key id: 537C5846
PGP Key fingerprint: 3D1B 8377 A3C0 A5F2 ECBB  CA3B 4607 4319 537C 5846


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