Concatenated RAID disk won't add

I formatted a 186.3 GB and 279.5 GB drive into an MS-DOS Concatenated RAID. I did this because I had read that you can add on new drives without reformatting the whole RAID set.
Well, I added another 186.3 GB drive, but the new space doesn't appear. I read that on +HFS setups adding drives may not work but I'm using an MS-DOS setup. I don't understand where I went wrong.
The drives are located externally through a firewire Coolgear CGS-213FB brideboard with an Inito 2430L chip. The board allows for 4 drives.

Hello thetopologist,
Welcome to Apple Discussions!
If I understand what you're asking:
The raid you've made can only be increased in size by destroying the entire raid, adding the other drive and reformatting with the new drive.
I'm sure I don't know every type of raid out there, but I haven't heard of a raid you can add disk space to without reformatting the entire raid.
The conrtoller (of the raid) has to know the hard drives, their size and the configuration of the raid set. It also has to keep track of all the files that get written to the raid.
Keep in mind, what you've made has no failover protection, if one drive goes down, you lose everything. And each drive added to the raid is another point of failure in the disk sub-set by an increased factor each time you add another drive.
The Concatenated RAID set is the OLDEST raid style there is. Hard drives go bad, it's a fact. If you need more space and insist on a raid, please consider a Raid 5 with parity.
This gives you 1 failover drive (automatically rebuilding lost data on the spare drive) and one data to track parity.
If you have 5 disks, you'll only get to use the space of 3.
! for parity and 1 for the spare. And you need to knock off about 7% for formatting to figure your end capacity correctly. This makes for a safe disk array.
What you're trying to do is something of a SAN fucntion, where the actual disk drives have been divided up into seperate LUNS, meaning several LUNS on 1 disk, and having software manage the LUNS into disk Pools. These Pools are then presented to the host bus adapters on the host computers. In this way disk space can be added on the fly without impacting the data already on the system, the space just grows. These systems are very expensive, the EMC SAN we have was over 100K just to start.
Sorry to be so long with this, but I feel this is an important subject not to be taken lightly. Your investment into your computer was not cheap and neither is your data.
I guess it's like saying, "If you have a $10 head, buy a $10 helmet".

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On purhcase I was told this could be done, as it's a Concatenated JBOD setup. For a better description of what I mean by that, this wiki article describes it well http://en.wikipedia.org/wiki/StandardRAIDlevels.
Does this provide any further clues?
Currently there are 7x 1TB drives in 2 enclosures. I've now added 2 more 1TB drives. I can currently see and continue to use the data on the existing 7 drives. My worry though is that if I quit the disk utility I may lose the data on the 7 original drives.

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I'd just like to add some screen shots so you can see what's going on:
This is what's happening in Disk Utility. As you can see, all the slices are being seen, it says it's online, etc., but it's grayed out in the side bar and I can't seem to actually do anything with them.
And here's what diskutil in Terminal says. As you can see, it's finding it, and I can even "mount" Backup, but it doesn't actually mount it. What does the "rebuild: manual" mean?
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Hey Everybody
In Disk Utility help it says : "You can increase the size of a concatenated RAID set after you create it by dragging more disks to it using Disk Utility."
Well I have created a concatenated RAID a while back with two 500 GB drives, in disk utility they are both online, now I want to add a 300 GB drive to it.
And it says in help, it should be possible, But I don't know how to do that.
Do I have to take the drive, ofline? How? Unmounting does not seem to work
Anybody know how I can add a drive, without losing the data already existing on the RAID?
Thanks

Yes, that's a new feature in the 1.5 firmware. If you pull a drive, the system makes you acknowledge you want to use it (and it's good) before it will let you use it again -- prevents people from re-using drives that the RAID is actively failing out (due to SMART errors), without noting they're explicitly intending to do that.

Warning lights on XRAID but RAID Admin won't mount it.

I have 3 Final Cut edit suites sharing 2 x 7TB XserveRAIDs.
I had an audible alarm on one of my RAIDs an amber flashing light by the System Identifier Button.
Edit 2 started up fine and my editor was happily working away. I then went Edit 2 to mount the RAID storage - made up of 2 x 7TB XserveRAIDs each split into 2 partitions providing a total of 4 volumes creating my volume based SAN. As I tried to mount the RAIDs using SANmp I had real issues. Eventually got the volumes mounted but then had the greyed out screen of doom when I tried loading up a Final Cut Pro project and had to do a forced shut down.
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I tried looking up the RAIDs on the RAID Admin Tool but I'm only seeing 1 RAID when I should be seeing 2. The AID that is mounted is not giving me any errors which makes me think I've lost communication with the RAID with the problem.
Should I just shut the whole system down and hope it starts talking to me again when I fire it up again?
I just want to get on an edit my show.
Thanks.

William: Thanks for your reply, but you seem to be wide of the target here.
RAID Admin can connect to the RAID,
but doesn't see drives?
No. I can run RAID Admin on the Xserve or on a separate laptop, and either way RAID Admin can't find any RAIDs to show in the list of available RAIDs. So it doesn't even get to the stage where it can see any individual drives, since it doesn't find the RAID unit in the first place.
The red light you're seeing, as well as the
fact that Disk Utility can see all the drives
as individuals,
Clarification: Disk Utility is showing symbols for drives, but of course these are really partitions of the RAID, not the individual physical hard drives in the RAID.
indicates that either stuff is set in JBOD mode
... well I'd love to report what mode it's in, but RAID Admin won't show me . However, judging by the fact that there's no part of the file system that's obviously missing, (and also by our original intent when this was set up) I'm 99.9% sure it's in some redundant mode, and 99.8% sure that is simply in default RAID-5 mode.
or something is seriously wrong...
... depending on the meaning of "seriously"!
I'd guess the RAID set (and any data that
was on it) is gone.
... though as I noted in original post, it's in everyday use, including by me, and I've not detected any missing data, aside from a handful of files (out of total approx 2 million files) that return read errors.
Graham
Many Mac OS X (10.3.9) Many

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http://www.w3schools.com
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Hi beau_nidle,
Thanks for visiting Apple Support Communities.
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I would like to use my deactiveted iPhone 3G for apps and music. How do I add music? When I synch with iTunes it won't add the selected playlists.

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See if this link offers any insight,
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Ok. So its finally working again. Not sure why, but maybe my experience will help someone else.
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Hello folks,
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Hi,
I'm afraid we will not get it resolved. BMR will restore the partition information so you need at least a 600GB disk/RAID to restore both Drive C and D - it will create partitions on disk/RAID but cannot be separated restore to different disks/RAIDs.
How about get another 300GB disk and change your system RAID from RAID1 to RAID5. (Or change RAID1 to RAID0 but of course you will lose fault tolerance ability).
If you have any feedback on our support, please send to [email protected]

Concatenated RAID disk won't add

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