Hi SLUG, 

not so much a linux question, but having difficulty finding clear answer. 

When it comes to speaking of JBOD v's RAID 0 (specifically), there are plenty 
of opinions, but haven't found a clear definition yet. I'm not worried about 
RAID's 1 & up. 

I understand the following terms to have the following definitions underlying 
them. But is this understanding correct? 

Striping: 
Effectively a RAID 0 array, wherein there is no guarantee which piece of what 
file is written to which disk in the array. 

Spanning: 
2 (or more) disks presented as single logical volume ( / Drive), however file A 
might be written to Disk 1 and file B might be written to Disk 2.

Concatenation: 
2 (or more) disks presented as single logical volume ( / Drive), however Disk 1 
is filled before Disk 2 is filled before Disk 3, etc. 


So, the questions are; 

1. Are these understandings correct? 
2. If not, what am I missing? 
3. Which implementation is JBOD? Spanning or Concatenation? 


MTiA

Kyle
-- 
SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/
Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html

Reply via email to