Submit Hint Search The Forums LinksStatsPollsHeadlinesRSS
14,000 hints and counting!

10.4: How to create a partitioned RAID setup Install
I just read this older hint about RAID and partitions on OS X Server, and it seems that it does not work in 10.4. So I tried doing it differently.

I opened Disk Utility from the utilities folder and did the following. On the two disks I would be using, I created equal partions, i.e. all the same size. I named these partitions 1a, 2a, 3a on the one drive, and 1b, 2b, 3b on the second. Then I went to the RAID tab and did this:
  • Dragged the partions 1a and 1b to the RAID window and clicked Create.
  • Dragged the partions 2a and 2b to the RAID window and clicked Create.
  • Dragged the partions 3a and 3b to the RAID window and clicked Create.
Now I had three RAID partitions. I don't know how safe this is, but it seems fine after running some tests.
    •    
  • Currently 1.67 / 5
  You rated: 2 / 5 (6 votes cast)
 
[13,858 views]  

10.4: How to create a partitioned RAID setup | 5 comments | Create New Account
Click here to return to the '10.4: How to create a partitioned RAID setup' hint
The following comments are owned by whoever posted them. This site is not responsible for what they say.
10.4: How to create a partitioned RAID setup
Authored by: Numbski on Jun 22, '06 10:24:57AM

Seems to me that it would make more sense to just create a single raid array, then partition the newly formed disk:

Use RAID5 (striped) on the three disks. Creating a new virtual disk. Now partition that virtual disk into 3 volumes as you see fit. You'll get more redundancy that way too.

Now if you have two disks and want three volumes, do a mirror set, then partition that one mirror set to 3 volumes. What you're doing is asking for trouble later.



[ Reply to This | # ]
SATA?
Authored by: jpkelly on Jun 22, '06 11:52:10AM

Does this work with SATA I tried to partition a mirrored RAID and was unable.
The RAID option tab did not show up in Disk Utility.



[ Reply to This | # ]
10.4: How to create a partitioned RAID setup
Authored by: beauh on Jun 22, '06 03:52:59PM

Not quite... RAID 5 isn't possible through software (apple's at least), nor is slicing an array. The OG post is the only way to end up with multiple partitions + RAID.



[ Reply to This | # ]
10.4: How to create a partitioned RAID setup
Authored by: Sulliman on Jun 23, '06 10:34:36AM

Shouldn't this be called creating RAID from partitioned disks? This may be functional but I think this could cause a problem if a drive ever fails as you would lose all of your volumes



[ Reply to This | # ]
10.4: How to create a partitioned RAID setup
Authored by: stepwallace on Jun 26, '06 05:35:36AM

This feels like a bad idea. Can the user actuallly confirm that if a drive fails the OS successfully rebuilds the data AND the partitions?

Or would you need to manually recreate the partitions prior having the RAID array repair a faulty drive.

Good idea - but it just feels like a bad one. At least I wouldn't be trying it out without thorough recovery testing.

---
__
http://www.step.net.au

[ Reply to This | # ]