OS X :: Creating Mirrored RAID On Startup Disk?
Dec 24, 2010
I have a Mac Pro that I want to create a mirrored RAID set in.
I have a 1TB Hard Drive that is the main system drive.
I just added a 2nd 1TB Hard Drive that I wanted to use along with this first hard drive to create a mirrored RAID set.
I used the following document to help with the process:
[URL]
I have opened up Disk Utility and think I may know how to do this but a few things concern me.
First, it states that it will erase the contents of the drives it's using to mirror. I had the idea it would simply duplicate the data onto the other drive. Is it true that it will delete the data on the current drive?
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Jun 20, 2012
I have just finished setting up my first Lion Server from scratch on a Mac Mini with dual 500GB Drives which I set up as RAID 1. I have the server exactly as I want it, and before the users start logging on and it gets all screwed up I would like to create a disk image of it so that I could reinstall if necessary w/o having to start from scratch.
Is the process of creating a disk image for a RAID 1 any different than that of a disk image from a single drive set up? Will Disk utility just see this as a single volume or will it want to create a disk image of the entire RAID? i.e will the disk image be 1 TB (500 GB x 2)? And when it comes to reimaging my RAID, will I just recreate a RAID 1 and be able to write to it from that disk image?
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Apr 7, 2009
Having spent that much on a computer, added to the fact that I'm now starting to get more music/audio freelance work, means I'm keen to get a decent backup system going. I aim eventually to get a 1tb external drive and use time machine to backup my samples drive, but what do you reckon would be the best option for the system drive?
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Jul 23, 2010
Having had an issue with 2 powercuts in quick succession meaning my Mac Pro was unbootable I am looking into the software RAID built into Snow Leopard. I know it doesn't replace backups and I got my data back ok from backups. My system disk is a 1GB drive, could I purchase a 2nd identical drive and mirror across that without having to do a system re-install? What would happen to the Bootcamp partition which is also on the same drive. Taking my thoughts one step further, if I bought 3 more 1TB drives, could I create software mirror sets, and then stripe across those, which should give me some performance and reliability gains?
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Dec 7, 2007
Thinking of using 500GB and 750GB internal drives for a raid 0 startup disc (software raid obviously)?
Information:
Dual 2.5 G5
Mac OS X (10.4.11)
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Oct 4, 2006
I have a PowerMac G3 running OS X Server 10.4.7. There is an 80GB ATA boot hard drive and a SATA card and two 250GB SATA drives. One SATA drive is existing and has data on it; I just installed the second one because I want to mirror the 1st drive onto the 2nd one.My questions are: how do I do it? When I try to create a RAID set in the Disk Utility GUI, it says all data will be destroyed. I cancelled that.So I tried diskutil enableRAID mirror disk1, which told me I could only mirror volumes.The volume name is RAID, so I tried diskutil enableRAID mirror /Volumes/RAID which gave me an error "Error enabling disk to RAID Could not unmount disk (-10000)"
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Jun 8, 2012
I have an existing drive with an existing partition. Can Disk Utility be used to convert this to a stripe set? I assume not but it would save sme time if it could. I have two iTB drives that I would like to treat as a single 2TB drive.
Info:
Mac Pro (Early 2008), Mac OS X (10.7.4), iPad, PowerMac G5; PowerBook 17
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May 20, 2009
I have a new Mac Pro Quad 2.93 with the Mac RAID card installed with four 1TB drives setup in a RAID 5 array. When creating the volumes in the RAID utility, you can not edit them, resize, etc. If one large volume is created in the RAID utility, you can then partition that one volume using the Apple Disk Utility, which then allows you to resize if needed.
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Apr 23, 2012
how can i re-create a hidden lion partition after creating a RAID 1 array for Lion Server 10.7.3 My new mac-mini did not come in the array i'd expect it to come with being a server?
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May 28, 2012
How do I clean my start up disk for more space? I have I cloud but don't really use it.
Info:
MacBook Pro, Mac OS X (10.7.4)
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May 26, 2009
I'm currently in the process of trying to install Win7 on my Macbook Pro (purchased July '07) using an ISO burned to a DVD with Disk Utility. Unfortunately, the DVD isn't bootable, and while the symptoms match what's in this blog post, the author's solution involved using a Windows-only program.
I'd like to know if it's possible to re-burn the ISO without the version number in the filenames as in the original solution, but with Disk Utility or something else that a Mac can use.
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May 14, 2009
I want to upgrade my iMac G5 from its original 250GB disk to a 1TB WD Caviar Green.
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Jan 2, 2011
I have some files that I occasionally send to my family members. The thing is, because they contain sensitive information (finance records, sometimes they're family videos), I don't like just uploading it to my iDisk.
What I've been doing is going into Disk Utility, creating a password-protected disk image, then zipping up that file. It's a few layers of security, and the 128-bit encryption seems good. The thing is, I'm not sure what settings to use.
Here's a screenshot of the window that comes up when creating a new disk image. What options should I choose from here? I can do a Get Info on all of the files I'm putting in the disk image, but it would be easier to have it auto-fit whatever I put in, eliminating any unused space. I'm not sure of what to put for Format, Partitions, and Image Format, and I'm surprised that I have to choose a size since I've heard there's a way to have it automatically fit the files.
Is there a way to select my files/folders in the Finder and have a disk image created from the selection?
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May 6, 2009
So I downloaded Windows 7, and Im kinda confused on how to make the boot disk. I have tried to use Disk Utility by selecting the ISO and clicking burn, but there is always an error. Do I burn the disk image itself, or the folder that comes from it?
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Feb 13, 2006
Formatting my new HDD today... noticed the RAID option in disk utility and found myself wondering what it is, why it is, and, perhaps most importantly, can I use it? I get that its a bunch of HDD's linked up but is that better/different than my three FW HDD's daisy chained together?
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Jun 16, 2008
i am trying to format a brand new 120 GB hard drive via an external USB 2.0 enclosure. About 25 minutes ago, I selected the "erase" option and slected the Mac OS Extended (Journal) Volume format. For the last 25 minutes, disk utility has been saying that it's creating a partition map. It's doing nothing.
I have reason to believe my enclosure may be faulty. (I had a similar problem on an old hard disk and thought that the problem was with the disk; now I know.) I need to know: How do I disconnect/eject the hard disk without damaging it? The eject option in Disk Utility is grayed out. If I attempt to quit Disk Utility I get a warning telling me I could leave my disk inoperable.
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Apr 5, 2010
I'm a serious photographer and do my post processing in Capture NX2 (2.2.4). Sometimes, especially when saving files, it drags on interminably. I have read that one way to speed up NX2 is to create a scratch disk. I'm currently upgrading my HD on my iMac G5 (Leopard) to a 1TB HD. Would it be wise (and efficient) to create a partition on the new HD and use it as a scratch disk? I understand you can't use the boot drive as a scratch disk, but if I partition will I be able toname the new partition something other than Macintosh HD, thus permitting use of a scratch disk?
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Jul 7, 2008
i would like to reserve my 4th bay for windows only drive and a software raid will be used for these.
what would you think is a better set-up,
3x internal drives (all of the same model, probably WD 640's) set in raid 0 (both serve as boot drive and scratch disk) occupying bays 1, 2, and 3. In this set-up, everything (DVD's, music, photos, final cut media) would be stored on this array.
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Feb 18, 2009
Yesterday I switched on my macbook (Leopard) and got the flashing question mark. Ran all the resets and booted with disk utility which encountered an 'Invalid B-tree Node' when attempting to repair the disk. Additionally, the SMART status was verified.
I ran DW 4 last night, and performed the hardware tests which reported that the disk was operating like normal. The majority of my media files and additional work is backed up to my Time Capsule but I still have a folder of papers that are relatively new, and wanted to retrieve. While DW managed to reconstruct the majority of my drive (there seemed to be 15g missing - but it's just music files) including this folder, it couldn't replace the disk, as it encountered 'Serious Disk Malfunctions'.
So, via the Disk Preview I want to transfer my saved folders to my TC, but I don't appear to be able to locate it (via ethernet) through DW - even if it's connected when I boot up in DW. So, first request is: Can I connect to my TC to transfer across in DW's preview?
Second is: What are my options if DW can't replace? Do I need to take it into Apple and get a new HD (it's out of warranty)? It's possibly worth noting that I'm a student and have absolutely no money - so cost effective options are a bonus!
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Jun 24, 2014
I get this question mark along with a folder when starting up. I tried holding down the option key when turning on the power and then I get an internet recovery along with a globe. I click on the arrow below it and it takes maybe 15 minutes to start up. Then i get this disk utilities screen. I'm now unable to do anything. When going into disk utility, disk 0 shows with Mac OS X base system underneath it. All the clickable buttons are faded out. Is there something wrong with the hardrive? and where could i get this fixed? There isn't a warranty on it.
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Feb 28, 2009
I'm trying to repair my hard drive. I restarted from the OS X Mac Mini install CD (holding down the letter C when I heard the chime), opened Disk Utility from the Utilities folder, selected my hard drive image, but the "verify disk" and "repair disk" options are grayed out. I'm at a loss as to how to proceed.
Information:
Mac Mini
Mac OS X (10.5.8)
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Jan 1, 2008
I have 2 internal Serial-ATA disks:
Both were checked (with Disk Utility and DiskWarrior) and are OK. But only one of the two disks shows in the Startup Disk list in System Preferences->Startup Disk.
PowerMac G5 / OS X (V.10.4.11)
3GB memory
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Jul 1, 2014
Every time I try to restart my computer on my Hard Drive I get this message "Startup disk could not gather enough information on the selected disk". As of right now I am running my whole computer off of a 16GB flash drive that is quickly running out of memory. How do I fix my Hard Drive without losing all 150GB worth of data. I am running off of OS X 10.6.8 and have another iMac that is working fine.
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Feb 22, 2010
I ran installer then went to disk utility and pushed disk repair. it ran and indicated in green that no repairs were necessary. i then went to startup disk and only the Diks and network startup showed up but no hard drive. i also open computer to make sure was not wet muddy due to leak in cooling system but all was dry
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Jun 7, 2012
I am getting this warning. Not sure what to do or how to do it. Couldn't find any information on freeing space without erasing important files.
Info:
Mac Mini, Mac OS X (10.5.6)
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Dec 9, 2009
I just got a 2nd caviar black 1tb and I'm goin to be setting up raid with another drive.. I have data on my current 1tb which is backed up with time machine. what do I have to do to get the drives workin in raid? I'm lookin to have a faster write speed since I need the raid setup. Since I will be using the 2 drives for my data and a photoshop scratch disk, should I create a partition for the scratch disk? I've seen some say yes.. Some that said no but without reason.What r the pros/cons to partitionin the drive?
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Jul 5, 2012
I have a Mac Mini that I plan to use as a simple file server with a 2TB external disk. I would like to be able to add future external disks to grow the original 2TB volume I create to 4TB, 6TB, etc. using RAID.
I know it is possible to add disks to a concatenated RAID set without destroying the data on the disks already in the set, but I cannot get Disk Utility to let me create a single-disk concatenated RAID set.
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Jul 11, 2010
I have a couple of questions regarding backing up my external drive. I've got a 2TB external drive with about 1.5TB of movies, Music etc. I've got another identical empty drive that I want to keep a backup of the first drive on. So my question is what is the best way of backing up this data? I thought of using disk utility(I'm running snow leopard 10.6.4 if that makes any difference) to created a mirrored RAID set. If I plug in the empty drive then create the RAID set will my first drive get wiped when the set is created? or with it leave the data on the first drive intact? Or should I just use something like crashplan to backup to the 2nd drive?
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Jun 28, 2012
I'm low on internal hard drive space. Am using Time Machine. It appears that Time Machine is creating disk images in my downloads folder, taking up even more space. Is there some way to limit or stop that process and just use Time Machine to back up.
Info:
MacBook Pro (15-inch 2.4/2.2 GHz), Mac OS X (10.5.8)
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Aug 20, 2014
I have a new iMac using OS 10.9.4. I got an external HD for backup purposes and successfully formatted it. Now I want to create partitions; however, my Disk Utilities app does not contain any tab or command for creating partitions. Where should I be looking?
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