Boston Linux & Unix (BLU) Home | Calendar | Mail Lists | List Archives | Desktop SIG | Hardware Hacking SIG
Wiki | Flickr | PicasaWeb | Video | Maps & Directions | Installfests | Keysignings
Linux Cafe | Meeting Notes | Blog | Linux Links | Bling | About BLU

BLU Discuss list archive


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Moving from RAID 0 to LVM RAID?



 On Thu, 2008-03-06 at 20:09 -0500, Ben Holland wrote: 
> From what I understand about LVM's it doesn't buy you anything and will make 
> your headache only so much worse. 

Agreed. 

> If you have a computer that allows 3 
> drives in it, chances are very high that it will have a raid 5 controller 
> built in 

I'd wager more like 50-50. I've seen plenty of 2U boxes that have 4 to 6 
drive bays and don't come with any RAID controller at all, let alone one 
capable of RAID 5. 

> if it doesn't you have several options. RAID 1 2 drives using 2 
> other drives as backup, Software raid 5 3 drives using one as a hotspare, 
> software raid 4 drives (this benefit is that you don't loose AS much disk 
> space as the other 2). LVM doesn't buy you anything, sure you can group 
> together volumes but if a drive dies, then you loose all the LVM's 
> associated with it 

Not quite. You can actually do a vgremove of the dead drive, and 
typically recover any files that were completely confined to the 
remaining disks/volume groups. 

> this is bad and in fact your LVM controller may really 
> hate you 

Um... There is no such thing as an LVM controller. Its all done in 
software by the kernel. 



-- 
Jarod Wilson 
[hidden email] 


-- 
This message has been scanned for viruses and 
dangerous content by MailScanner, and is 
believed to be clean. 

_______________________________________________ 
Discuss mailing list 
[hidden email] 
http://lists.blu.org/mailman/listinfo/discuss
 


BLU is a member of BostonUserGroups
BLU is a member of BostonUserGroups
We also thank MIT for the use of their facilities.

Valid HTML 4.01! Valid CSS!



Boston Linux & Unix / webmaster@blu.org