Mac Pro :: RAID 5 Volumes - Create In RAID And Disk Utility?

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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PowerPC :: Internal RAID Card To Create RAID 1 Mirror Of System Drive For G5

May 16, 2007

I have a PowerMac G5 and need to purchase an internal RAID card to create a RAID 1 mirror of the system drive... one that will allow me create a Hardware RAID 1 mirror, not software RAID through OS X.

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Mac Pro :: RAID Option In Disk Utility

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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Mac Pro :: Setting Up Raid For 2 HD / Create Partition For Scratch Disk?

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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OS X V10.7 Lion :: Create Single-disk Concatenated RAID?

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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IMac :: Disk Utility RAID Setup - Backing Up Data

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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Mac Pro :: RAID Sets And Volumes

Jun 8, 2012

I am trying to set up a RAID5 but am having trouble with the volumes.  My RAID set is 5.23TB but my Volume is only 2TB.  I am creating a second volume of 3.23TB. Is there a way to combine the two volumes into one volume of 5.23TB to match the RAID set?

Mac Pro, Mac OS X (10.7.4)

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Mac Pro :: Re - RAID - SSDs And Boot Volumes

Jan 12, 2011

So I'm considering a new boot volume for my Mac Pro revolving around this RAID controller, since I have had great experience with 3ware's products in my Linux boxen and it really seems like $700 for the Mac raid controller is a bit much. My workflow revolves very heavily around virtualization. I've been thinking about a variety of options for SSDs and hybrid drives and even just fast laptop HDs. Am I crazy for considering 2.5" drives other than SSDs? I'm thinking of 2.5" drives because I put a pair of them in the lower optical bay without issue. The amount of storage needed on the boot volume is probably in the range of 150-200GB. Getting SSDs that size may not be in the budget. Thus, I am currently considering either a pair of 320GB WD Scorpio Blacks or a pair of 250GB Seagate Momentus XTs. I'm not sure the hybrid Momentus drives are worth it. Additionally, I know that a lot of SSDs don't fully support RAID in their firmware. Thus, I am reluctant to buy one, let alone a pair, since a lot of places don't seem to have terribly generous return conditions for SSDs. Is this a fool's errand? Should I just relegate my VMs to other storage and get a smaller SSD for the OS + apps?

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Mac Pro :: Can Software RAID Volumes Be Expanded

Mar 24, 2009

I popped a new drive into my Mac Pro that's running a 2 disk raid-0 stripe set. I thought I could add the new drive into the existing raid array but I fail. Disk Util won't let me drag the new drive into the raid set.

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Mac Pro :: Have A "degraded Raid" Message In Disk Utility?

Mar 31, 2012

I have a "degraded raid" message in disk utility. I have four drives in the slots but nothing shows up for slot 3 ? What do I do?

Mac Pro, Mac OS X (10.5.8)

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Hardware :: Can A RAID 1 Guardian Maximus Rebuild Easily / Have Partitioned The RAID Set

Dec 2, 2009

I just bought a Guardian Maximus RAID1 kit and I have two 1TB drives in it. I'm using it over Airport Extreme as an airdisk (mac osx 10.6.2)

My question is simply: am I running a risk by partitioning it into two partitions? Should I ever have to rebuild the failed disk (which I understand is really simple with the Guardian Maximus) - will it have trouble doing two partitions? I'm using one 500gb partition for time machine and one 500gb partition as redundant itunes/media.

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Hardware :: Lacie RAID Shows Up As Two Separate HDs Instead Of A Single RAID HD?

Jan 28, 2009

I have a Lacie ext hard drive with 2 x 250gb HD that were one RAIDed into a single 500gb HD. I ran this update Lacie firmware update: And now my HD will only show up as two separate HDs of 250gb instead of a single RAID HD of 500gb.

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Mac Pro :: Get A Highpoint Raid Controller And Put Those 4 Drives In A Raid 5 Array?

May 1, 2008

I have a macpro with 4 x 1tb drives

Is it possible to get a highpoint raid controller and put those 4 drives in a raid 5 array (and then create partitions inside that array) - or do you need to have 1 drive by itself for the operating system, and then create a raid array using the remaining 3 drives?

Lastly, are the highpoint 3500 series a decent card? and fully compatible?

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Mac Pro :: Move To A RAID Card / Will I Need To Recreate My Entire RAID?

Sep 13, 2009

I'm using the software RAID right now. Everything is set as RAID 10. I want to move to a RAID card� if I keep it as RAID 10 will I still need to redo everything?

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Mac Pro :: Raid Speed ... Raid 5 Vs Straight Sata HDs

Jan 28, 2008

ive put 4 of the hitachi 1tbs in my new mac pro.. and i really want to do Raid on them eventually.. and buy the pricey apple raid card.. i'll do it.. but speed wise:

How fast is a Sata connection straight from HD>Motherboard... ~75mb/s?
Is the Raid 5 config with all those drives much faster... around ~110mb/s?

Do you know if there is anyway to get a 5th drive into the raid 5 array? using the ODD space.. or some externals too... i need as much as space as possible...

And boot camp wont work with raid card anymore? I was thinking to have the startup disc be a raptor to increase speed on the apps, how would it integrate with the raid card, etc

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OS X :: Possible To Move RAID 0 To A Single Drive In The RAID?

Nov 16, 2009

I have a RAID 0 set up with two 1.5TB HDs. I am doing some reorganizing and want to take all the data on the RAID 0 and move it to one of the hard drives in the RAID 0 and create to single drives. Is there any way of moving all the data from a RAID 0 onto one of the HDs?

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Mac Pro :: Software RAID Versus Hardware RAID?

Apr 20, 2010

I am planning on getting a 2010 MP when they come and have a question about it. I am 90% sure that with my budget, I will not be able to after a RAID card. I am wondering if software RAID would be alright or if it's so bad it's not worth doing. Also, there is small chance that I could buy a RAID card later on, how would I install it? I will be using it for 3D animation with Maya and some zbrush modeling. Also I will be doing some Photoshop and illustrator and maybe some gaming on win 7 boot camp. Feel free to list any other pros and cons about either a software RAID or hardware RAID, I wana make sure I have all the details before making a final decision on it.

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Mac Pro :: Setting Up RAID 1 Without RAID Card?

May 15, 2009

I have never setup RAID before and this question may be totally stupid for that matter.

Can I setup RAID 1 (or call it mirroring) without the RAID card? I have two 1TB internal drives in my Mac Pro and I want to mirror them. I don't want to spend another 700 bucks just to setup a mirror.

Disk Utility shows some RAID options, but I am not sure how to use them, or if they will work at all without the RAID card.

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Mac Pro :: Mirror RAID Or A Stripe RAID?

Feb 14, 2010

On my 2009 Mac Pro, OS X's disk utility seems to allow the provision of making a mirror RAID or a stripe RAID.

Is it possible to shove in 2 drives, make a RAID 0 for two of them, and then add in 2 more drives to make a RAID 1 out of that RAID 0? (a RAID 0+1?)

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OS X V10.7 Lion :: Create A Raid 1+0 Setup Across Daisychained Thunderbolt Harddrives?

May 15, 2012

I need more storage and need it to be quick and redundant 

I'm concidering 2 of either the WD thunderbolt duo 6TB or the LaCie 2Big Thunderbolt 6TB. I want to set each 2disk unit to RAID 1 and then srtipe them as RAID0 accross thunderbolt to hopefully result in one striped and mirrored 6TB RAID volume  

I'm hoping yes because i've seen 4 of the WB unit daisychained as one huge RAID0   but I'd like the redundancy. also i want the resultant volume in exFAT as I am constantly jumping between OSX and Win 7

MacBook Pro (17-inch Early 2011), Mac OS X (10.7.4)

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OS X V10.7 Lion :: Re-create A Hidden Partition After Creating A RAID 1 Array For Server 10.7.3?

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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OS X :: Resize Volumes Partitions With Disk Utility Under Snow Leopard 10.6 10A432?

Sep 4, 2009

I recently replaced Leopard 10.5 with a clean installation (not an upgrade) of Snow Leopard 10A432 (SL) on my Intel Core 2 Duo MacBook (aluminum, 2GB RAM). Under Leopard 10.5 I was able to use Disk Utility (DU) to dynamically re-size existing volumes on USB hard drives. But under SL I am unable to do so. While I am able to replace all existing partitions on a USB drive with a new set of partitions and resize them prior to their creation by dragging the slider bars, once created, DU will not let me dynamically resize the new partitions. Doing so was easy with DU under 10.5. For example, after I re-partitioned a USB drive with DU under SL and created 2 partitions, I was able to make the top partition smaller by dragging the bottom edge upward from the lower right corner, but there seems to be no way (and no slider bars) to adjust the size of the lower partition to use the space freed by having made the upper partition smaller. In fact, although the upper partition reports a smaller size, when clicked on, the border around the upper partition still includes the range defined by its initial, larger size. There also seems to be now way (no slider bars) at the top edge of partitions that would allow them to be expanded/contracted from the top down. Has anyone else encountered these issues? Any thoughts/suggestions as to how to resolve them? Are these known issues? I have searched but not come across it as yet.

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Hardware :: Buying Enclosure - Adding Software To Create Raid 5 Storage Solution

Dec 12, 2008

I'm trying to build a raid 5 USB storage system to connect to an AirPort Extreme router. I am currently looking into buying the following enclosure and adding software to create a raid 5 storage solution which I can connect to the AE for both backup and media storage. Can someone help me find good software to create this raid 5 setup? 4-bay JBOD Enclosure [URL:...]

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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:


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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Mac Pro :: Unable To Boot Disk, Raid, And Final Cut

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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OS X :: Converting Existing Startup Disk To RAID?

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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Power Mac G5 :: Internal Drives For RAID 0 Startup Disk

Dec 7, 2007

Thinking of using 500GB and 750GB internal drives for a raid 0 startup disc (software raid obviously)?

Dual 2.5 G5
Mac OS X (10.4.11)

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Mac OS X Lion Server :: Creating A Disk Image Of A RAID 1 Setup?

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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OS X Server :: Create Mirrored RAID Set From Existing Drive And New Drive?

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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Mac :: Can Used Disk Utility To Create The Stripe Partition

Sep 5, 2009

I have installed 2x Intel X-25M Gen2 (SSDSA2MH160G2C1) 160GB SSDs in RAID 0 (striped) in my 17" uMBP. Second SSD was installed using a MCE Optibay in place of CD-ROM. I used the OSX Disk Utility to create the stripe partion with no problems. I currently have 10.5.8 loaded and will be loading 10.6.0 tonight and doing some simple GeekBench benchmarks.

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