lvm or btrfs? which is preferable (when, if applicable)

[Reindl Harald]

Am 21.01.2013 07:43, schrieb Bill Davidsen:
> Reindl Harald wrote:
>>
>>
>> Am 20.01.2013 02:00, schrieb Ranjan Maitra:
>>> Thanks again for your quick response.
>>>
>>> OK, so you are suggesting I move to lvm, or leave things as is, to ext4?
>>> The new installer does not give me an option to format ext4 (but I can
>>> keep it as is, I guess).
>>>
>>> How does one convert from ext4 to lvm? Is there any benefit to moving
>>> to lvm?
>>
>> you should really read some basic documentations
>>
>> ext4 is a filesystem
>> btrfs is a filesystem
>> lvm is NOT a filesystem
>>
>> you have ext4, btrfs, whatever FS ON TOP of LVM
>> http://en.wikipedia.org/wiki/Logical_volume_management
>>
>> for most private environments there is no real benefit of LVM
>> spread LVM over more than one disk with no RAID under it
>> is simply dumb becasue if ONE of the disks goes down
>> you have a problem
>>
> Your point about loss of data is well taken, but having data on any storage without RAID for error recovery is a
> risk, having data on just one machine is a risk. The admin has to balance cost and benefit, for both hardware and
> administrative learning curve considered as "cost."

but there is a difference if i have only one disk
which can go bad and all is away or i have as example
4 disks an dif ONE OF THEM goes bad all is away

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