sd, sd, who's got the sd - f7 work required before release!

David Timms dtimms at iinet.net.au
Mon Apr 30 12:46:18 UTC 2007


dragoran wrote:
> David Timms wrote:
>> Will Woods wrote:
>>> Styma, Robert E (Robert) wrote:
>> ...
>>>> How will the two FC7 systems detect the new drive?
>>>>
>>>> Is there a method to the madness?
>>>
>>> This is why we use disk labels or UUIDs instead of device names. With 
>>> changes like this in the kernel and especially with machines with 
>>> removable drives, or machines using fancy multipath storage, it's 
>>> nearly impossible to reliably predict exactly what order the drives 
>>> will be found in.
>>>
>>> So the solution is: just give the partitions names instead. Then it 
>>> doesn't matter if your FC6 root drive is sda1 or sdb1 or hdc1, it's 
>>> always LABEL=fc6_root. If you say "mount LABEL=fc6_root /fc6" it will 
>>> Do The Right Thing.
>>>
>>> So, in short, it doesn't matter how the two FC7 systems will detect 
>>> the new drive, so long as you give it a useful label.
>> Will, you could have mentioned:
>> 1. a command to set the label ?
>> 2. whether an lvm label like LogVol01 or LogVolhome is the same as the 
>> label you are mentioning ?
>>
>> Consider it either good or bad that a long time redhat/fedora user 
>> does not know such a command - it gets set by the installer - for 
>> actual partitions, but not? for LVM logical volumes ?
>>
>> After much searching "label lvm partition" etc in google with little 
>> result, I stumbled across the mkfs.ext3 parameter -L volume-label, but 
>> decided that would actually format the partition.
> tune2fs -L yourlabel /dev/yourdevice
This is fine for those who understand how to do this. But for an average 
Joe, would you agree that this should be automated ?

DaveT.




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