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I have a RAID 10 (0+1) setup among 4 drives and I'm installing my OS and it's showing 2 drives. My understanding of this structure as outlined here: is that I should only be seeing a single drive. I'm hesitant to install the OS to one of these drives when I think I should be seeing a single drive.


My raid controller looks like this....

id   name       level         strip    size       status     bootable
0    primary    RAID10(0+1)   64 KB    921.5GB    Normal     Yes

Below that it shows all physical disks belong to Member Disk (0)


It appears I only have the option for RAID10(0+1) .... dangit, why can't I get 1+0?

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I am not familiar with that Intel controller. Are you sure it isn't fakeraid. Using the software RAID may be preferable to fakeraid. – Zoredache Aug 3 '10 at 23:54
@Zordache, I checked out the ESB2 controller he's got; Intel just re-branded an Adaptec chip. – Chris S Aug 4 '10 at 13:27
up vote 2 down vote accepted

You are correct; it's definitely not a RAID10 if you see two drives. It's more likely two RAID1 or two RAID0 arrays. If your RAID controller has an option for RAID10, just pick that and assign the 4 drives; it should come out looking like one drive.

On a side note, why RAID 0+1? It's a better idea to do 1+0 if you have the choice.

Here's a copy of Intel's RAID Setup Guide for the ESB2 Controller

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Refer to the page I linked to as to why I'm doing 0+1. Despite seeing 2 drives, the RAID control panel is showing that all 4 drives belong to the RAID10(0+1). But I still see 2 drives when I go to setup ubuntu server. – Webnet Aug 4 '10 at 0:12
Do the disks belong to the same volume or 2 different volumes? If there's nothing on the disks, I'd be inclined to delete all the RAID arrays and start from scratch with another RAID10 array. – Ben Pilbrow Aug 4 '10 at 0:23
There's nothing on the disks right now, I've deleted the RAID arrays multiple times - assuming you're referring to simply deleting the raid volume. Basically the setup I have right now is I have 4 empty drives and a raid controller. I haven't done anything past trying to configure raid. – Webnet Aug 4 '10 at 13:06
@Webnet, see my edit; I'd suggest deleting whatever you have now and following those directions step by step. – Chris S Aug 4 '10 at 13:25
Chris you're right, I was trying to setup the wrong raid controller. Thanks for that Chris!! – Webnet Aug 4 '10 at 13:35

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