Re: why partition arrays?

[Bill Davidsen <davidsen@tmr.com>]

Henrik Holst wrote:

>Bodo Thiesen wrote:
>  
>
>>Ken Walker <ken.walker@manchester.ac.uk> wrote:
>>
>>    
>>
>>>Is LVM stable, or can it cause more problems than separate raids on a array.
>>>      
>>>
>
>[description of street smart raid setup]
>
>(The same function could probably be achieved with logical partitions
>and ordinary software raid levels.)
>
>  
>
>>So, now decide for your own, if you consider LVM stable - I would ;)
>>
>>Regards, Bodo
>>    
>>
>
>Have you lost any disc (i.e. "physical volumes") since February? Or lost
>the meta-data?
>
>I would not recommend anyone to use LVM if they are less than experts on
>Linux systems. Setting up a LVM system is easy: administrating and
>salvaging the same, was much more work. (I used it ~3 years ago)
>
My read on LVM is that (a) it's one more thing for the admin to learn, 
(b) because it's seldom used the admin will be working from 
documentation if it has a problem, and (c) there is no bug-free 
software, therefore the use of LVM on top of RAID will be less reliable 
than a RAID-only solution. I can't quantify that, the net effect may be 
too small to measure. However, the cost and chance of a finger check 
from (a) and (b) are significant.

-- 
bill davidsen <davidsen@tmr.com>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979