Creating Raid Set Failed With The Error
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2013 Messages: 17 Jul 29, 2013 at 6:02 AM #1 ErroneousDylan Joined: Jul 13, 2013 Messages: 17 Here's the rundown. I have an SSD which I use as my boot drive and two 1TB HDDs as my storage in RAID 1. I had to reinstall Mountain Lion disk erase failed with the error couldn't unmount disk on to the SSD. I also wanted to remove my storage RAID and erase those drives
Partition Failed With The Error Couldn't Unmount Disk
as well during this process. I am successfully able to erase and partition the SSD boot drive and reinstall Mountain Lion. However, whenever I error 69888 couldn't unmount disk try to delete the RAID or erase one and/or both of the storage HDDS I get errors such as: Deleting RAID set failed with the error: Invalid request. or Disk Erase failed with the error: Couldn't open device. I have
Volume Erase Failed Couldn't Open Disk
tried doing this with Disk Utility from both in the actual operating system of Mountain Lion and during the install with Unibeast. I have also tried turning my machine off, unplugging a HD, and attempting the same thing to no avail. It simply will not let me delete the RAID or erase my drives. Please help. ErroneousDylan Joined: Jul 13, 2013 Messages: 17 Jul 29, 2013 at 6:16 AM #2 ErroneousDylan Joined: Jul 13, 2013 Messages: 17 Trying to Partition disk erase failed with the error couldn't open device a drive also gives the error: Couldn't open device. ErroneousDylan Joined: Jul 13, 2013 Messages: 17 Jul 29, 2013 at 6:33 AM #3 ErroneousDylan Joined: Jul 13, 2013 Messages: 17 Okay. I got it. I had to turn the machine off and manually unplug BOTH of the HDs from the mobo. Then I was able to erase them once back into OS. Thanks for all the help! (You must log in or sign up to reply here.) Show Ignored Content Share This Page Tweet Your name or email address: Do you already have an account? No, create an account now. Yes, my password is: Forgot your password? Stay logged in tonymacx86.com Home Forums > Post Installation > General Help > Home Buyer's Guide Installation Guide Forum Create New Post The Build Buying Advice Desktop Compatibility General Hardware Deals of the Day Golden Builds User Builds Installation The Basics Sierra Desktop Support Sierra Desktop Guides El Capitan Desktop Support El Capitan Desktop Guides Yosemite Desktop Support Yosemite Desktop Guides Mavericks Desktop Support Mavericks Desktop Guides Mtn. Lion Desktop Support Mtn. Lion Desktop Guides Lion Desktop Support Lion Desktop Guides SL Desktop Support SL Desktop Guides BIOS/UEFI DSDT SSDT Other Operating Systems Linux Multi Booting Windows Post Installation Audio HDMI Audio General Help Graphics Network Hardware Troubleshooting OS X Updates The Workshop Bootloaders Customization Overclocking Case Mods Completed Mods iMac Mods Mac Pro Mods PowerMac G3 B&W PowerMac G4 Po
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• @mggjimDisk Utility received its first significant makeover in years as part of the recent OS X El Capitan update, and while Apple hopes the new design will make the app easier to understand and use, https://www.tekrevue.com/tip/create-raid-el-capitan/ the new version of Disk Utility is missing at least one crucial function: RAID support. Check out these awesome custom engraved Corkcircle Canteens from Perfect Etch. RAID -- a redundant array of independent disks -- is a technology that allows users to combine multiple physical disks into a single virtual volume in one of several ways that can increase capacity, increase speed, increase redundancy, or some combination of the three. A deeper look at RAID failed with is beyond the scope of this tip (for a quick overview, check out this video from Techquickie‘s Linus Sebastian), but the key point is that the ability to create and manage software RAID volumes -- something that was possible in previous versions of Disk Utility -- is no longer available in OS X El Capitan. Previous versions of Disk Utility included the ability to create and manage RAID volumes. While El Capitan's version of Disk failed with the Utility may be missing this important feature, the good news is that users can still perform many RAID functions via Terminal. The process isn't as simple as the old Disk Utility GUI, but for users running Apple's latest desktop operating system, it's the next best thing to investing in third party software SoftRAID. To illustrate how users can manage RAID volumes in OS X El Capitan, we'll use an example in which we want to create a 2TB RAID 0 volume from two 1TB SSDs, labeled TB1 and TB2. The first step is to determine the disk number of each drive you wish to include in your RAID, as we'll need this information for the Terminal command that will eventually create the RAID volume. We can obtain this information in one of two ways: via Disk Utility or via the diskutil command line function. Looking at GUI method first, launch Disk Utility and select the first disk that is destined for your RAID volume. In our example, we're using two Samsung 840 EVO SSDs, so we'll select one of the disks, not volumes, from the Disk Utility sidebar on the left. With the disk selected, find the Device box on the right side of the screen and note the disk number. In our case, our SSDs are disk2 and disk3. If you prefer to stick with Terminal, you ca