A question on installing - FC5 32bit and M$Win2000

Matthew Saltzman mjs at ces.clemson.edu
Mon Apr 24 16:06:40 UTC 2006


On Mon, 24 Apr 2006, Frank-Michael Fischer wrote:

> Stephen Liu wrote:
>>
>>
>> I did not use LVM logical volume before.  What will be its advantage?
>>
>> TIA
>>
>> B.R.
>> SL
>>
>>
>
> Advantage: you may add more disk space later on without disrupting your
> directory structure. BIG disadvantage: if one physical disk (or even

You can also resize partitions relatively easily inside an LVM.

> just physical partition) in an LVM fails your whole file system is gone.
> No repair possible. And another BIG disadvantage on dual systems with
> Windows: Unlike "traditional" ext3 partitions you may access read/write
> from Windows you will not be able to access anything on an LVM.

Both good points (the first only if you spread your VolGroups over 
multiple drives, the second only if you really care to access ext3 
partitions from Windows and aren't interested in virtualization).

>
> Practical conclusion: except on systems keeping non-unique temporary
> data (example for such data: scans of existing documents for further
> processing and later archival) stay away from LVM.

Or have backups.  (Not a bad idea anyway.)

>
> We should not forget we are paying Redhat a price for getting "free"
> Fedora: we are Guinea pigs for in most situations pretty useless staff
> like selinux and lvm. Thats why these are installation defaults. I do
> not know e.g. about a single company reducing its profits or increasing
> its losses by not having selinux.

How big is your sample?

>                                   Military and similar people in their
> special way of thinking just love selinux and even LVM. LVM gives you
> the possibility to somehow use scattered parts (disks from otherwise
> broken PCs) and turn them into one single large disk for a running

Ah, another advantage for LVM--no need to repartition an existing disk 
with scattered empty space and no need to limit filesystem sizes to 
individual partition sizes.

> system (until the next bomb explodes). Therefore: anyone who likes to
> support all the military woldwide as potential Redhat customers should
> spent hours and hours testing selinux for Fedora. ;-)
>
> FMF
>
>
>
>

-- 
 		Matthew Saltzman

Clemson University Math Sciences
mjs AT clemson DOT edu
http://www.math.clemson.edu/~mjs




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