Disk Utility Raid 1

I have an iMac running OS X version 10.8.5 , Processor 2.7 GHz Intel Core i5, Memory 4GB 1333 MHz DDR3 .
I use Time Machine to back up on a WD MyBookStudio. I recently had a disk error:
I ran disk utility:
2013-10-21 19:34:34 -0500: Checking volume information.
2013-10-21 19:34:34 -0500: The volume Time Machine was found corrupt and needs to be repaired.
2013-10-21 19:34:35 -0500: Error: This disk needs to be repaired. Click Repair Disk.2013-10-21 19:34:35 -0500:
2013-10-21 19:34:35 -0500: Disk Utility stopped verifying “Time Machine”: This disk needs to be repaired. Click Repair Disk.
2013-10-21 19:34:35 -0500:
I ran the repair tool and repaired the volume:
2013-10-23 09:55:34 -0500: The volume Time Machine was repaired successfully.
2013-10-23 09:55:34 -0500: Volume repair complete.2013-10-23 09:55:34 -0500: Updating boot support partitions for the volume as required.2013-10-23 09:55:35 -0500: Repair tool completed:
2013-10-23 09:55:35 -0500:
2013-10-23 09:55:35 -0500:
Should I be concerned about this error and get another backup disk?
Should I get and additional WD MyBookStudio and run Disk Utility Raid 1 to have 2 duplicate drives?
How well does Disk Utility Raid 1 work?
Where can I find more information about running Disk Utility Raid 1?
Thanks for your help !!!

bump

Similar Messages

Disk Utility RAID Issue

I'm trying to determine if the problems that I'm encountering are a software issue or a hardware issue.
I'm setting up a Mac Pro with Leopard and have four Maxtor 6G160E0 160GB hard drives that I'm trying to set up as two Mirrored drive sets. Everything seemed to go fine, created the two mirror sets, installed Leopard, configured and tested two user accounts and Office 2004, then updated everything to the latest version. When done I shut it down planning on moving it to it's final home tonight.
But, when I turned it on both mirror sets were degraded - all four drives were still recognized as RAID slices but came up as failed in the RAID tab. I saw no errors reported in the log so I assumed that those two drives were faulty. I shut down, moved the good drives to bays 1 & 2 and rebooted.
First reboot gave me a prohibition symbol instead of the usual Apple. Powered down and on and it booted fine but the second drive came up as a failed RAID slice. Rebooted again and both were fine.
I reinstalled the two "failed" drives and reformatted them - both reformatted fine and mounted without problems. I unmounted the new partition just in case, but, when I tried to rebuild the RAIDs I get the following in the error log:
11/1/07 7:26:00 PM Disk Utility[141] Preparing to erase : “Untitled”
11/1/07 7:26:00 PM Disk Utility[141] Partition Scheme: GUID Partition Table
11/1/07 7:26:00 PM Disk Utility[141] 1 volume will be created
11/1/07 7:26:00 PM Disk Utility[141] Name : “Untitled”
11/1/07 7:26:00 PM Disk Utility[141] Size : 149.1 GB
11/1/07 7:26:00 PM Disk Utility[141] Filesystem : Mac OS Extended (Journaled)
11/1/07 7:26:00 PM Disk Utility[141] Creating partition map.
11/1/07 7:26:03 PM Disk Utility[141] Formatting disk1s2 as Mac OS Extended (Journaled) with name Untitled.
11/1/07 7:26:06 PM Disk Utility[141] Erase complete.
11/1/07 7:26:12 PM Disk Utility[141] Unmount of “Untitled” succeeded
11/1/07 7:26:31 PM Disk Utility[141] Rebuilding RAID
11/1/07 7:26:31 PM Disk Utility[141] Filesystem: Mac OS Extended (Journaled)
11/1/07 7:26:31 PM Disk Utility[141] RAID type: Mirrored RAID Set
11/1/07 7:26:31 PM Disk Utility[141] RAID set name: “Yorktown”
11/1/07 7:26:31 PM Disk Utility[141] RAID set status before rebuild: “”
11/1/07 7:26:31 PM Disk Utility[141] RAID chunk size: 32K (default)
11/1/07 7:26:31 PM Disk Utility[141] Mirror Auto Rebuild: Disabled (default)
11/1/07 7:26:31 PM Disk Utility[141] 2 members
11/1/07 7:26:31 PM Disk Utility[141] RAID Slice (disk0s2) - Online
11/1/07 7:26:31 PM Disk Utility[141] Maxtor 6G160E0 Media (disk1) - New
11/1/07 7:26:32 PM Disk Utility[141] Error rebuilding RAID: Unrecognized Filesystem.
11/1/07 7:26:33 PM Disk Utility[141] RAID failed: Unrecognized Filesystem.
I'm at a loss at the moment. I am leaning towards bad drives, but FOUR bad drives all at once is suspicious.
I've searched for similar issues and found none so I thought I'd check here and see if anyone had any ideas.

G'day Zeekm,
Thank you for that. I did this and it seems to work. The Disk Utility GUI does not seem to work.
Hope this helps some one,
#Checked the RAID status
root# diskutil checkRAID
RAID SETS
===============================================================================
Name: Server_HD
Unique ID: 7E31E20E-F53D-4D76-AD37-139C4E1440AB
Type: Mirror
Status: Degraded
Size: 1000070610944 B
Device Node: disk2
Apple RAID Version: 2
# Device Node UUID Status
0 disk1s3 BAC72F86-B05F-4B0F-97D3-58A6207E7DFA Failed
1 disk0s3 2BFB55BB-EFF9-438C-A1F9-A8ED7A93D385 Online
===============================================================================
#Told it to resync
root# diskutil repairMirror disk2 disk1s3
Note: Syncing data between mirror partitions can take a very long time.
Note: The mirror should now be repairing itself. You can check its status using 'diskutil listRAID'.
temp:~ root# diskutil listRAID
RAID SETS
===============================================================================
Name: Server_HD
Unique ID: 7E31E20E-F53D-4D76-AD37-139C4E1440AB
Type: Mirror
Status: Degraded
Size: 1000070610944 B
Device Node: disk2
Apple RAID Version: 2
# Device Node UUID Status
0 disk1s3 9D955C85-7EC0-4E92-848A-62D9F7C12EED 0% (Rebuilding)
1 disk0s3 2BFB55BB-EFF9-438C-A1F9-A8ED7A93D385 Online
===============================================================================
Hope this helps,
Cheers,
Arthur

See a Disk Utility RAID on another Start Up?

Hey
we made a mirrored RAID with two FireWire externals. How can we see the RAID set while booted from another Start Up Volume - without the Holy Hard Drive Trinity "Initialize, Ignore, Eject" coming up?
Is there a pref file that need so to be copied over? BTW the set was created while running Server 10.4 - the other start up is 10.3+ - in case that makes a difference... (it's one partition tho.) Or do we say "ignore" that repair with Disk Utility?
Tim
MacBook (BootCamp), various Macs and servers Mac OS X (10.4.7)

RAID of any time created with Tiger are not backward compatible with Panther.
For that you would need SoftRAID or to create the RAID under Panther. Quite a few changes and improvements went into Tiger (and again w/ 10.4.4 I believe).
And, to really do FW800 RAID you want each drive on independent bus/channels as well (I had to invest in two PCI controllers).

RAID card or Disk Utility RAID - Need simple comparison please.

Folks, I am trying to make sense of the necessity or lack thereof for Apple's RAID card. Can someone provide a simple breakdown or comparison of the RAID card and/or loading the Mac Pro with drives and striping them using Disk Utility. I was under the impression that I could buy a Mac Pro, fill up the drive slots and just have Disk Utility set up the RAID. I'll be working with HD.
Enlighten me please

Can someone provide a simple breakdown or comparison of the RAID card and/or loading the Mac Pro with drives and striping them using Disk Utility.
Users that are working with uncompressed HD 1920x1080 10bit RGB video usually aim for storage speeds of 240MB/sec or more. Obtaining this level of performance across the RAID is the trick.
The Apple RAID 5 card can provide 306MB/sec. when configured as a striped RAID set, using four Seagate 250GB model 7200.10 internal hard drives with 16MB cache, when the volume is empty. By the time the striped RAID set reaches 80% full performance drops to 214MB/sec. A setup that can provide 240MB/sec. when the volume is 100% full will provide a more reliable configuration for 1080 uncompressed HD video processing.
Disk Utility can provide this same level of performance without the RAID 5 card.
So what is the advantage of the Apple RAID 5 card?
The redundancy of RAID 5 can add a layer of protection against the failure of a single hard drive. RAID 5 can be rebuilt whereas RAID 0 provides zero data protection. The problem with RAID 5 in a four drive setup is that one disk is required for storing parity data. This leaves the RAID 5 slower as only 3 disks can be used for performance. In a RAID 5 four drive setup the top speed available will usually be approximately 210MB/sec. and when full closer to 180MB/sec. As you can see RAID 5 adds some data protection but the price is lower performance. That is the feature that the Apple RAID 5 card offers combined with a bootable internal solution.
Do I need 240MB/sec. performance?
Users that are not working with uncompressed HD 1920x1080 10bit video may find slower RAID performance will work for them. HDV requires approx. 25MB/sec and DVCPRO HD needs 100MB/sec.
On the other hand, when I am working with large video files the faster the RAID, the easier it is to work with large files. So while I may not have dropped frames with slower DV formats I still
prefer to work with as fast of a RAID configuration as I can justify.
Other Options?
The Mac Pro has many superior performance options available for creating fast RAID volumes. My current favorite setup is the eight channel Areca ARC-1221x RAID 6 controller paired with an external Enhance E8-ML enclosure. You can see an AMUG review of it here:
http://www.amug.org/amug-web/html/amug/reviews/articles/areca/1221x/
This setup provides a RAID 6 array with twice the redundancy of RAID 5. It also supports up to eight hard drives which significantly enhances performance. Using eight Seagate 320GB model 7200.10 hard drives in a RAID 6 configuration with the ARC-1221x provides over 430MB/sec. when empty and over 220MB/sec when 100% full. Up to two drives can fail and the RAID can still be rebuilt. The ARC-1221x is available to AMUG members for $680 until the end of the month here:
http://www.tekramonline.com/amugpromos.html
The Enhance E8-ML 8 bay enclosure is $595. Details are here:
http://www.amug.org/amug-web/html/amug/reviews/articles/enhance/e8/
You will also need two external Mini-SAS to Infiniband cable model Ext-MS-1MSB. I got mine here:
http://www.amazon.com/exec/obidos/ASIN/B000FUOMO0/arizomacinusergr
So for $1340 you get an 8 bay RAID 6 setup that provides awesome performance, supports RAID levels 0, 1, 3, 5, 6, 10 or JBOD and can even be setup to boot the Mac Pro with any of these RAID configurations. I think this is a great setup.
More Options
If the user already has SATA PM enclosures and wants to add external RAID 5 capability for minimal cost, HighPoint has introduced the new RocketRAID 2314.
http://www.amug.org/amug-web/html/amug/reviews/articles/highpoint/2314/
The HighPoint RocketRAID 2314 only costs $200 but it adds nice RAID 5 performance with SATA PM enclosures when using the new Mac version 2.11 driver. Using two SATA PM enclosures with 5 hard drives mounted in each enclosure for a total of 10 drives can provide RAID 5 performance of over 370MB/sec when empty and over 318MB/sec when 100% full. It doesn't offer RAID 6 or boot capability but this is very nice RAID 5 setup.
The card costs $180 on sale here:
http://www.amazon.com/exec/obidos/ASIN/B000NAXGIU/arizomacinusergr
Two quiet Sonnet 500P five bay enclosures will run $1000
http://www.amug.org/amug-web/html/amug/reviews/articles/sonnet/500p/
So for $1180 users have a high performance RAID 5 setup that supports up to ten SATA hard drives. The RAID 5 performance is twice as powerful as an internal four bay solution. Plus, this setup allows users to still utilize the Mac Pro internal bays for importing more data or for backup.
The Apple RAID 5 solution is a nice one. It just seems a little pricey compared to other faster solutions that are available. However, if Apple ever came out with a new RAID 6 card that used the internal 4 ports plus offered two external mini-SAS ports for a total of 12 drives, that would be a product totally worthy of a $1000 premium.
Happy hunting!

Disk Utility RAID of 2 volumes, one drive mistakenly erased. Recoverable?

Thanks for any help.
I have a Mac Pro.
It has 2x 750GB drive formatted in Disk Utility as a RAID volume (striped).
I erased one of the volumes by mistake.
I know I can recover the data from the erased drive, but it will be useless without the other drive. So how would I go about restoring the data in such a way that it is recognized as the other half of the RAID volume again?
Thanks for any help.

The commercial "SoftRAID" ($149) http://www.softraid.com
... is able to convert Apple RAID to its own format, AND has had excellent success for others in recovering in some situations.
They have excellent support so email them; a demo; and good PDF guides for download are worth a read.

Disk utility raid

I'm planning on doing a concatenated disk set using disk utility for my external drives. But what happens if I had to reinstall os x, does it recognize the raid set? Or will I loose my data?
Thanks.

Yes.

Disk Utility RAID setup problem

I just formatted two 5TB drives in order to setup an internal RAID for an Intel Mac Pro (early 2009 OSX 10.10.1). I had no problem installing a RAID on 2TB drives a couple years back using Disk Utility. Now, the RAID option does not even appear for the new disks. I can see the RAID option when choosing the OS disk. The only other hint is Disk Utility says "this type of disk cannot be used as part of a RAID set". I have never seen this error. A disk is a disk (and a horse is a horse of coarse of coarse).
What do I do to make these drives eligible to be part of a RAID?
The disks are Seagate ST5000DM000. See image below for lack of RAID option.
Any and all assistance is greatly appreciated!!

Thses are normal but innocuous messages resulting from installing ARD and Java updates. If you now have Lion installed then these are left overs from the Snow Leopard system you upgraded. Don't worry about them. They will recur when you run repair permissions.

Disk Utility Raid question

Is it software based RAID? or does the disk utility control a hardware based RAID?

For every disk drive I keep two backups. Rather than relying on mirror, which copies problems, and protects only from a hard failure, a FW800 and eSATA might be the way to go.
SoftRAID ($149 3rd party) will alert you on any I/O error and supports "stripe reads" from mirror if you go that route.
Zero your drive, backups, good maintenance. You can also backup to disk images.
Always always have an emergency boot drive AND a copy of the OS before you make any updates.
It is possible to partition a drive and then stripe or mirror using part of the drives to other identical drives. Performance of your "0+1" is poor.
If you are like most, over the years I've tried various setups and configurations, and continue to, in part to test and tweak, or to learn along the way. But backup sets are deeply ingrained from over 30 years of handling files, systems and data. And in the rare event of a drive failure, most of the time a simple reformat (or 7-way write erase nowadays) works. And there are programs to test and map out bad sectors. Heat more than anything shortens a drive's life, assuming the drive's mechanics are good (most are).
You have your drives, so can't sell you on which drives are enterprise, optimized or best for RAID (some are not suitable, and some have problems).

How do you break a RAID 1 created in Disk Utility and retain data?

Good Morning all !!
Quick subject question.
Background: I have 2-3 TB of important data that i use only rarely. I purchased two 4TB external drives. I could not use a 2 drive raid enclosure because of the fan noise in the studio. I selected 800 firewire fanless enclosures. The technican talked me into using the Disk Utility Raid 1 in Mountain Lion OS.
Problem: I only plug them in when needed probably once a week. The raid rebuilds every time I use the raid. That takes about a day. This arrangement is less than ideal.
Question: Can I break the raid and still have the data intact on 2 separate drives? Of coarse I would do it when they a rebuilt.
Thanks.
Mike

Good Morning all !!
Quick subject question.
Background: I have 2-3 TB of important data that i use only rarely. I purchased two 4TB external drives. I could not use a 2 drive raid enclosure because of the fan noise in the studio. I selected 800 firewire fanless enclosures. The technican talked me into using the Disk Utility Raid 1 in Mountain Lion OS.
Problem: I only plug them in when needed probably once a week. The raid rebuilds every time I use the raid. That takes about a day. This arrangement is less than ideal.
Question: Can I break the raid and still have the data intact on 2 separate drives? Of coarse I would do it when they a rebuilt.
Thanks.
Mike

Volumes Won't Drag Over in Disk Utility

I'm in Disk Utility. I am trying to mirror the 250gb drive that came with the computer with a 250gb partition I've made of another drive. I am following the directions in the disk utility help page to the T, and there is a weird problem. I can't drag the disks into the list.
first disk info:
http://thepunctuator.net/LBWS/raid1.png
Mount Point : / Capacity : 232.6 GB (249,715,376,128 Bytes)
Format : Mac OS Extended (Journaled) Available : 208.6 GB (223,937,794,048 Bytes)
Owners Enabled : Yes Used : 24.0 GB (25,777,582,080 Bytes)
Number of Folders : 112,925 Number of Files : 499,501
second disk info:
http://thepunctuator.net/LBWS/raid2.png
Mount Point : /Volumes/Macintosh HD2 Capacity : 232.9 GB (250,053,931,008 Bytes)
Format : Mac OS Extended (Journaled) Available : 232.8 GB (249,976,754,176 Bytes)
Owners Enabled : Yes Used : 73.6 MB (77,176,832 Bytes)
Number of Folders : 4 Number of Files : 9
When I first loaded up Disk Utility, I couldn't even drag the disks at all. I would click&hold and start moving, and the disks didn't pop into icons and start dragging. I quit the program and loaded it back up, and now they pop into icons, but when I hover them over the list box, nothing happens. It doesn't add them to the list. No amount of quitting and restarting the application fixes it. Restarting the computer did not resolve the issue either.
Here is kind of what it looks like when I drag the disks over, if you pretend the cursor is there as well:
http://thepunctuator.net/LBWS/raid3.png
When I release, the disks are not added to the list.
If no one knows how to resolve this issue, does anyone know a way to do this operation from the terminal?
Mac Pro 8-core Mac OS X (10.4.9)

Re: "
In Disk Utility, go to Help menu and read how to use the program to create RAIDs."
I've read that manual (as I mentioned in my original post, thanks for reading). Here is what it says:
"If you booted your computer from a disk that has multiple partitions, you cannot create a RAID set that contains partitions from your boot disk. To create a RAID disk that contains partitions from that disk, you must boot your computer from another disk first."
That's fine, but I can't believe I have to format the partition in order to RAID it. Why can't I just mirror it and have it rebuild the information onto the second partition? That seems like a simple and obvious bit of functionality. What is it about HFS that prevents this from happening? To be honest, I just don't believe you.
Re: "Apple Disk Utility RAIDs will only use the smaller capacity for building parts. You would be better to format each drive, with a 2nd partition on the larger. However, using drives of unlike capacity and speed (seek times do vary and just like with SCSI it is best if they are identical DNA down to firmware)."
Thank you, but if you spent five seconds looking at my original post you would have seen that the partitions I'm using are the same size. (Ok, they're not exactly the same size, but less than .1% difference). As far as having identical DNA, shrug. I have a server with 3.5 tb RAID5 array sitting by my knee that has, not only disks from different manufacturers, but also a mishmash of SATA and IDE devices. It hasn't had a problem in three months. The performance is great.
Anyway, I am trying to get help with a specific issue which I recounted in my original post. I am not here to discuss the finer points of disk management with you guys - I am trying to deal with this specifically Mac issue of the Disk Utility application. I know how to handle myself in *nix, and if it fails, that's fine, I have a backup.
Thanks for your administration advice, but then again, no thanks. Does anyone have any help for the above issue?
Mac Pro 8-core Mac OS X (10.4.9)

'Disk Utility has lost connection with Disk Management Tool' w/ RAID 10 set

Using 4 internal drives, I have specified the following setup for each:
2 partitions, 1 'speed' of 5 GB and 1 'data' of whatever remains.
The 4 speed partitions stripe to a single RAID volume correctly.
The 4 data partitions are used to make a RAID 10 volume as follows:
The first 2 data partitions are mirrored to make a 'data-A'
The next 2 data partitions are mirrored to make a 'data-B'
These complete correctly.
Upon attempting to strip data-A and data-B in order to finish the RAID 10 setup, Disk Utility quits with the following message:
"Disk Utility has lost connection with the Disk Management Tool and cannot continue. Please quit and relaunch Disk Utility'.
A search here and on the nets reveals only that this message appeared in 10.3.x when attempting to repair disk permissions and had to do with a rogue iTunes support file. This is occurring on a blank system (no iTunes installed) so I don't think its the same cause.
Note that I was able to complete this setup under Tiger several times without issue, so it seems to be unique to Leopard. Does anyone know what is going on and hopefully suggest a workaround?

To answer my own issue and leave a marker here for others, I was able to successfully set up a RAID 10 partition using diskutil, indicating that the problem is Disk Utility itself and not the RAID implementation.
Disk Utility has proven itself to be bugridden (must restart frequently to get updated view of volumes; drops device names at various times; etc.) and this latest bug would seem to suggest that it should be avoided in favor of diskutil for any serious RAID construction.

RAID failed - Can't find status in disk utility

I have an Xserve G5 with 3 hitachi 80GB SATA hard drives with a RAID 5 (I think) running 10.4.6. A couple of days ago, the server was running really slow and the afp was taking up alot of cpu time, so we rebooted the server as we haven't had a problem with afp before. However, the server would no longer boot up and the RAID alarm started going off. Now when booting the server I get the apple screen and after a couple of minutes, the server's fan would start going faster and faster until they would be going full blast. So I tried to check the status using disk utility of the RAID, but I can't see any status. I admit that I have only been working with the xserve for almost a year and I don't know alot, but all I see on the left of the disk utility is xserve megaraid and below that Server HD. I checked both of these and clicked on all of the tabs (first aid, RAID, partition, restore, etc), but I can't find a place to check the status of the RAID. All I can find about RAID is how to create another one. I finally found that I can run megaraid -showstatus and it said that the first hard drive failed and the other 2 were online. I also took out the hard drive and ran hitachi's test drive software using the advanced test and it said everything was fine. So I'm not sure if there is just something wrong with the RAID or what.
I did order another hard drive that is exactly the same and it should be here in a couple of days. I also know that this is the hard drive that was accidentally ejected while the server was running before, but when the hard drive was put back in, the RAID rebuilt it and has been running fine till now. I am pretty sure that I shut the server off before when the hard drive got ejected and it would boot, so I'm just not sure exactly what this all means as the Hitachi software tells me there is nothing wrong with the drive.
Help please

I checked the status of the server and hard drive by booting off of the 10.4 installation disk, select utilities and disk utility.
I know very little about terminal, however I'm pretty good at dos so I can figure some things out if given some commands.
Anyway, I ran some commands and here are the results:
megaraid -showstatus
MEGARAID CLI version 1.0.12
No cmd argument
Um, so I think I remebered the command incorrectly and I did -showdevices instead. Sorry.
megaraid -showdevices
Physical devices Available = 3
Drive ID Identification Size(MB) Status
0 Hitachi HDS722580VLSA80 78529 Failed
1 Hitachi HDS722580VLSA80 78529 Online
2 Hitachi HDS722580VLSA80 78529 Online
diskutil list
/dev/disk0
#: type name size identifier
0: Applepartitionscheme *153.3GB disk0
1: Applepartitionmap 31.5KB disk0s1
2: AppleHFSServer HD 153.2GB disk0s3
/dev/disk1
#: type name size identifier
0: Applepartitionscheme *2.6GB disk1
1: Applepartitionmap 31.5KB disk1s1
2: AppleDriveATAPI 4.0KB disk1s2
/dev/disk2
#: type name size identifier
0: untitled *467.0KB disk2
/dev/disk3
#: type name size identifier
0: untitled *95.0KB disk3
/dev/disk4
#: type name size identifier
0: untitled *95.0KB disk4
/dev/disk5
#: type name size identifier
0: untitled *95.0KB disk5
/dev/disk6
#: type name size identifier
0: untitled *219.0KB disk6
megaraid -showconfig
Logical Drive RAID Level Stripe Size(KB) Size(MB) Status
0 5 64 156958 Degraded
megaraid -showapater
FW Version = A130
Bios Version = G117
Product Name = MegaRAID SATA 150-4D
Cache Size = 64MB
diskutil checkRAID
No RAID sets found
Thank you for your help. I really appreciate it and so do the teachers and the students!

Disk utility wont resize/add/delete a partition (HD is part of a raid)

I have two SSD set in a raid 0 in my MBP 15" late 2011 (Mountain Lion 10.8.2)
256gb Samsung
120gb Vertex 3
My Vertex 3 is partitioned into 2 parts
1. 70gb set in raid 0 with another 70gb partition in the Samsung
2. 50gb dedicated to Windows 7
My Samsung is partitioned in to 2 parts
1. 70gb set in raid 0 with the other 70gb partition in the Vertex 3
2. The rest of the space in this SSD is just for data storage.
The reason why I did it this way is a long story since it deals with issues in the optical bay SATA speed limitations so that's a different topic.
So here is my problem:
I have two 70gb partitions set in raid 0 between the two SSD's, the 50gb partition that was in the Vertex 3 dedicated to Windows. After a while I realized I dont use windows that much and wanted to erase that partition. Erasing it was easy, but now with the 50gb space left over I try to use disk utiility to divide the 50gb partition into 2 parts and it wont let me. The satus bar says "preparing to partition disk" for 30 minutes and it doesnt budge.
To make matters worse, I deleted that partition by clicking the minus sign on the lower right corner, and now that partition is completely greyed out. When I try to press the plus sign to add in the remaining free space in my Vertex 3, it wont let me. The satus bar says "preparing to partition disk" for 30 minutes again and it doesnt budge.
Does the 70gb raid partition in the Vertex 3 prevent disk utility from making further changes to the Vertex SSD? I am pretty familiar with disk utility and know my way around it but I have my hands tied in this situation. Please help!

Things I've tried:
1. Booting from an extenral HD with Moutain Lion and trying to use DIsk Utility to make changes to the Vertex 3 partition, same thing occurs (it hangs for 30 minutes with no progress).
2. After I deleted the 50gb partition from the Vertex 3, it is now greyed out. Now when I try to press the add sign in disk utility to add back that 50gb empty greyed out space to make it for free storage (choosing Mac OS Extended, journaled), SAME THING HAPPENS.
It seems as though once I deleted that partition from the Vertex 3, that 50gb space is now totally unuseable!
By the way, I dont have filevault activated if that info helps at all to diagnose it.

My hardware RAID 1 only showing up in disk utility and not finder.

Last week I finally was able to take my early 2011 iMac in to have my Seagate 1TB hard drive replaced for the recall.
Late 2010 model iMac
OS X 10.6.8
OWC Mercury Elite Pro 4TB x 4TB Hardware RAID
When I took it in the RAID 1 was working just fine. When I finally got the iMac back and booted everything up the RAID 1 was getting the dialog box that read "The disk you inserted was not readable by this computer."
I have tried going into disk utility to see if I can verify the disk and then saw it is coming up as two different volumes... Along with those two different volumes, I can not go to click verify as it is greyed out.
I contacted OWC and they said they have never heard of this and had two solutions, to try a software like diskwarrior, or if that didnt work I can take the drives out and try another external dock to see if it is the RAID hardware.
If anyone has any ideas as to what could help with this situation that would be great as I was under the impression (and told by a number of other people) that having a RAID 1 as my backup was good and should not need anything else. I just want to be able to get all the data off then I will rebuild it or send it into OWC.
Thanks!!!!

So a fault in the Hardware Raid controller could make it not read properly? I am planning on having a good backup set up after this!
As for the screenshot, the original was not set up with the SoftRaid. When I got the computer back I installed that to see if that may pick it up and make it at least readable to save the data on it. The two in question are the highlighted 4TB drives, which befor also read as one drive as it was set up in the OWC enclosure as a hardware raid.

Disk Utility gives error and does not rebuild mirrored RAID

After having a HDD fail on a mirrored RAID I replaced the HDD and attempted to rebuild. Disk Utility reports via Console that it can not find an Apple Boot partition to check size and then fails to repair the RAID. Details follow.
Mac OS X v.10.4.8 Server
Power Mac G3 (Blue & White)
512MB RAM
20GB ATA HDD – boot device on internal ATA bus
4x 160GB ATA HDDs - setup in RAID scheme on Sonnet ATA/133 PCI card
RAID configured using Mac OS X v.10.4.8's Disk Utility and is an Apple RAID version 2.
RAID scheme <from "diskutil checkRAID" cmd>:
Welcome to Darwin!
[myserver:~] myadminuser% diskutil checkRAID
RAID SETS
Name: Mirror_2
Unique ID: 5FF8AD5F-0892-482D-B430-C7069D63AFD2
Type: Mirror
Status: Online
Device Node: disk3
Apple RAID Version: 2
# Device Node UUID Status
0 disk0s3 1FB48B00-3E52-4C29-8F05-2ED8BDAE4544 Online
1 disk6s3 BF2E69C6-698E-4D6A-A2A9-FE8CDAD8A7B1 Online
Name: Mirror_1
Unique ID: B448A09D-EC10-41EE-BA45-4D4071A88EA5
Type: Mirror
Status: Degraded
Device Node: disk5
Apple RAID Version: 2
# Device Node UUID Status
1 disk2s3 09AD5705-CF67-48B3-8E31-79983BD4781A Online
0 disk4s3 23EB1952-8B18-4400-A6FE-22C2F707C097 Failed
Name: StorageRAID1
Unique ID: 2B8349AB-F553-4FD2-8440-C575791DA858
Type: Stripe
Status: Online
Device Node: disk7
Apple RAID Version: 2
# Device Node UUID Status
0 disk3 5FF8AD5F-0892-482D-B430-C7069D63AFD2 Online
1 disk5 B448A09D-EC10-41EE-BA45-4D4071A88EA5 Online
I configured this RAID scheme (two two drive mirrors striped together) according to this kbase document: http://docs.info.apple.com/article.html?artnum=304377
As shown in the above "diskutil checkRAID" output I have a failed HDD. So I replaced the HDD with another 160GB cold spare. I added the new drive to the mirror "Mirror_1" also known as disk5 and hit rebuild. Received the normal message that all data on the new drive I was adding would be erased.
I then receive the following error immediately in the Console Log:
Rebuilding RAID "Mirror_1"
2006-12-15 23:50:24.741 DiskManagementTool [375] WARNING: Could not find Apple Boot partition to check it's size, skipping disk5s-1s.
Rebuilding RAID slice "disk4s3"
Just to stem some confusion, the device ID disk4s3 has been used by the system for both the old failed HDD and the new replacement HDD.
The result of this attempted rebuild is I end up with all the data from Mirror_1 on the new HDD but the new HDD is not successfully added to the RAID, therefore Mirror_1 is still degraded and my problem not resolved.
I ran the appropriate rebuild cmd from both the GUI Disk Utility as described and from the CLI "diskutil repairMirror disk5 disk4s3" but no joy.
Any help would be greatly appreciated. This volume houses a large amount of important data including user home directories so while some offline time may be required data loss would not be very acceptable.
Thanks in advance and I will be happy to provide more information as necessary.

I guess doing it in Terminal would fail too:
diskutil repairMirror disk5 disk4

Disk Utility Raid 1

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