[nflug] fstab usb drive question

[Stephen Burke]

pirrone wrote:
> Stephen Burke wrote:
> 
>> pirrone wrote:
>>
>>> Stephen Burke wrote:
>>>
>>>> Hello all,
>>>>
>>>> I am running BLAG 30000 (fc3) on dell optiplex PII with a small hard 
>>>> drive (20 GB, dual-booted with 2k - 10/10) that has two usb2 hard 
>>>> dives attached to it. One is the totally enclosed variety (made by 
>>>> fantom drives) - 160GB - single vfat partition. The other is the 
>>>> aluminum enclosure variety (some assembly required) with a 250GB 
>>>> seagate drive split into four ext3 partitions. I would like to be 
>>>> able to add these drives into fstab (correctly this time) so that 
>>>> all five of these partitions would mount at boot time and I would be 
>>>> able to write to them and share them out and all that good stuff, 
>>>> but documentation about how to master fstab seems limited indeed. 
>>>> Unless I'm just looking in the wrong place.
>>>>
>>>> Can anyone enlighten me on either what fstab might look like here or 
>>>> where to find an fstab explanation not written in martian?
>>>>
>>>> Thanks,
>>>> S.
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>>>>
>>> Stephen,
>>>
>>> They will show up in your system as SCSI drives, /dev/sda and 
>>> /dev/sdb, with the former probably /dev/sda1 and the latter probably 
>>> something like /dev/sdb1-4 so /etc/fstab would contain entries like:
>>>
>>> /dev/sda1    /media/usbdisk1    ext3    defaults    1 2
>>> /dev/sdb1    /media/usbdisk2    ext3    defaults    1 2
>>> /dev/sdb2    /media/usbdisk3    ext3    defaults    1 2
>>> /dev/sdb3    /media/usbdisk4    ext3    defaults    1 2
>>> /dev/sdb4    /media/usbdisk5    ext3    defaults    1 2
>>>
>>> In any event it will be easy enough to test using mount -t ext3 
>>> /dev/sdwhatever /media/usbdiskwhatever and then drop what you 
>>> discover into fstab.
>>>
>>> Frank
>>>
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>> Thanks, I will try that.
>>
>> All the partitions mount without problems, but I'm trying to figure 
>> out how not to have to do it manually every time. The device names and 
>> mount points and fs columns in fstab I don't have a problem with. It's 
>> that 4th column (flags?) that confuses the hell out of me. For 
>> example, I have no idea what the "defaults" are. Elsewhere, I've seen 
>> it suggested that it should read "noauto,users,rw,umask=0", so that's 
>> what's in there now (and not working). I remember reading something 
>> about those entries a long time ago that didn't make much sense to me, 
>> so I'm trying to find documentation that will.
>>
>> Or maybe it's the 5th column that's screwed up, since I have 0 0 where 
>> you have 1 2? I can't seem to recall fully what those numbers mean 
>> either. Something about whether or not the fs gets checked at boot 
>> time, if memory serves. But, once again, docs seem to be lacking here. 
>> Perhaps I need to learn this well enough to write a new fstab doc, but 
>> I need others to help me learn it. ;-)
>>
>> Thanks again,
>> S.
>>
>> p.s. does the "s" in "sdx" mean scsi drive? All this time I thought it 
>> meant serial drive.
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>>
> Stephen,
> 
> The last two fields are 1=dump when backing up and 2=fsck second after 
> root filesystem.  The noauto you've been using is the problem.  It means 
> just that, don't automatically mount.
> 
> Linux uses SCSI emulation for a number of devices, extreme example might 
> be a Zip drive connected through the parallel port showing up as 
> /dev/sda.  Same for USB drives, including Flash drives.  So the /sdx 
> designation is indeed SCSI Drive x.
> 
> Frank
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Frank,

Thanks for enlightening me. Despite the fact that it seems like I've 
been hearing about SCSI, in general, for a long time, it's still sort of 
a mystery to me, presumably because I haven't wrestled with it much. Or 
perhaps I have and thought I was wrestling with usb.

Wily bastards, these daemons. ;-)

Hacking fstab now. Thanks again.

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