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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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 :: Creating A RAID 0 Stripe Set?

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.

Mac Pro (Early 2008), Mac OS X (10.7.4), iPad, PowerMac G5; PowerBook 17

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OS X :: Unable To Know About Mirror Raid?

May 9, 2010

I have a 1TB disk. It is now almost full. I just got a new 1TB disk and I want to make a mirrored RAID set of the two. If I create a RAID set in Disk Utility, does that erase my first disk? Or does it just mirror everything to the second?

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Hardware :: Can I Boot From A RAID 1 (mirror) In My G4?

Oct 2, 2008

I don't know where I read about this, but I am getting ready to redo one of my systems. Currently it has 2 identical 250GB Hitachies, which use Super Duper every Sunday to backup. I tried doing a RAID 0 back in like 2004 on a system that had 4x60GB. I found out through trial and error and then later reading that you can't boot from a RAID in a Power Mac G4. But like I said earlier I don't know where I read this, but someone stated I could boot from a RAID 1 (mirror) in my Power Mac G4. Is this true? or not? Is it possible to boot from a RAID 1 in a Mac G4 but not RAID 0?

Something tells me this isn't going to work. I have a 10% glimmer of hope that maybe it will just see the drive as a regular drive. This would really be great. If anyone knows the answer to this puzzle please feel free to let me know...

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Mac Pro :: Bootable RAID 1 Mirror Configuration?

Sep 28, 2009

Having never set up a RAID config I was hoping I could get a little confirmation on setting up. Firstly, all data will be backed up using a NAS (maybe a time capsule), so at the moment I am just looking to mirror the primary drive of a Power Mac G5 incase of hardware faults.

The G5 is acting as a server and I therefore want to arrive at a situation that if a drive fails, the machine will still boot perfectly from one of the redundant disks (and of course notify the user to the failure), i.e. a bootable RAID 1 configurationAs I understand it, I can only achieve this using a dedicated RAID controller (i.e. this can't be done via a software raid)? Is this the case?

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OS X :: Moving A Mirror Software RAID To A New IMac?

Nov 24, 2009

I have taking the plunge and bought a new i7 iMac. On my current machine I have 2 WD external USB drives (1TB) in RAID mirror, done through Disk Utilities. I am looking for advice on the correct way to move this to my new machine. Do I simply plug them in, and OSX does the rest? The data is very valuable, and I don't really have enough space to copy it all / back it up before i move it. Being a mirror, it is essentially is my backup.

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OS X V10.7 Lion :: How To Setup And Confirm RAID Mirror

May 23, 2012

Literally just got shiny new miniMac Server with the dual 70GB internakky hard drives/disks with OS X 10.7.$ LION pre-installed. What a nice machine in a super cool box Seemed to bootup and run fine!Now my issue (there will be more for this MAC newbie):How to setup AND more importantly (item B below) CONFIRM that a RAID MIRROR is working? Want nothing fancier than 2-nd drive is exact duplicate of 1-st drive at all times. That is, an 'active and full up-to -the second" backup of the main 1-st drive.I have done nothing to 1-st drive as it came from APPLE.When I try to setup RAID set using DISK Utility, I get message about system(1-st drive) can't be used in a RAID or such.

yet I can add 2-nd drive to what I tink is a RAID set and then 'Enable' it.It seems to add another entry to thr left-side of drves list panel but not sure that 1-st and 2-nd drives are BOTH in the new "RAID SET' or that the set just consists of the "single" 2-nd disk? B. I don't think that 1-st drive data is actually being duplicated to 2-nd drive.For instance, how do I know that it was 'caught up' to match 1-st drive AND then is [code]

Mac mini, Mac OS X (10.7.4), Pre-instaDual Internal drives/disks

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Mac Pro :: Changing From Mirror Raid To Two Independent Disks?

Aug 20, 2014

Can I just remove one of the drives and what are the consequences of the removal. I would like to go from a mirrored raid to a carbon copy of the disk which would be updated weekly and use Time Machine in between.

Do I open up a can of worms  - my suspicion is that if I want to do that I'll have to reformat the RAID with the loss of all data.

Any workaround short of making a copy, removing the raid and restoring the data?

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OS X Server :: Breaking Xserve Software RAID Mirror?

Jul 28, 2006

I want upgrade our xserve from 2 x 250GB mirrored discs running Mac OS X 10.3.9 on xserve to running 1 x 250GB system disc (keeping other as spare) and 2 x 500GB mirrored data discs. (Then upgrade to Tiger).

Can I break the software mirror with:
diskutil destroyRAID /dev/disk{x}
or does this destroy the data too? Would I be left with two working, bootable discs or just two RAID slices? If the latter, how can I convert them into 'normal' bootable discs?Would it be better to upgrade to Tiger first? Or not make much difference?

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Power Mac G5 :: Setting Up RAID On Internal Hd / Mirror My Drive With Apps And System?

Oct 19, 2007

I have 2ea 250GB internal HD. One with my apps and system on it and the other with no data. How do I mirror my drive with the apps and system? Or is that possible?

Dual 2.3ghz PowerPC G5
Mac OS X (10.4.10)
8 GB ram / 2ea. 250 GB internal HD

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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 :: 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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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 :: How To Use Raid 0?

Dec 12, 2010

I have a silly RAID question, and I can't seem to find an answer via the search.

I have 4 disks that I want to put in a striped raid. One of those disks (disk 1) has data that I'd like to keep.

If I put these 4 disks in the striped raid will I lose the data that is on disk 1?

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Mac Pro :: How To Know About RAID?

Aug 5, 2008

Currently I have a stock 320G drive installed with a 750G F1 Spinpoint installed as a Time Machine. I have maxed the 320 out so I'm looking to get a bigger drive.

Question: looking at the F1 Spinpoints, should I do 1x750 with 32M cache? Or 2x400G in a software RAID0? The 400s have a 16 Meg cache, so 32M total.

What's better? Do you think I'll see a better performance boost by striping over 2 drives with 16M cache each, or sticking with 1 drive with a 32M cache? And with the 2x400, I'll gain about 50 Gigs of storage over the 750G drive.

2x400 is $156
1x750 is $125

Is this a decent boost for only an additional $25, or should I just save a drive bay and get 1 drive?

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Power Mac G5 :: Add A Second HDD As A RAID?

Oct 19, 2007

My Mac is beginning to run low on free HDD space. I'd like to add a second internal HDD to boost space. However, I don't like having a completely separate HDD icons because I can never remember which files are on which disk, not to mention a lot of copying between the two.

I'm considering adding a second HDD and combining the two into a RAID setup. Do I have to reformat my existing disk, or can I just add the second HDD's storage onto my existing disk with Disk Utility?

If I can just pop in a second HDD and add its capacity to the existing one's, that'd be ideal. Having to clear off the existing disk before joining the two would be a chore, though.

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Mac Pro :: RAID 0 And ITunes

Sep 25, 2010

I have a RAID 0 set up on my 2009 MP. I am using two 2TB Caviar Blacks and have my boot drive on a OCZ 120GB Vertex. I have 50GB of iTune music on that drive and want to move it to the RAID 0.

Is it as simple as using the preferences on iTunes and choosing the 'Data' volume (name of my RAID 0) and assigning iTunes to that drive? Is this the guide I need to follow?

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Mac Pro :: Raid 6 Versus 60?

Oct 8, 2010

Okay, so... To make a raid 60, you make a raid 6 first then stripe that. If you started with a 4 disk raid 6 array and increased your number of disks to 8 when you stripe it, I have no trouble visualizing performance and capacity advantages.

However, I'm having trouble visualizing trade offs, speed or capacity differnces if you compared a 8 drive raid 6 vs an 8 drive raid 60.

If you are not Nanofrog, but you did stay at a holiday inn last night, you are welcome to reply as well.

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Mac Pro :: SAS RAID For BootCamp Only

Dec 17, 2010

LSI 9240-8i SAS RAID for BootCamp only. Will it be bootable for BootCamp? Anyone using that card? I need to connect 4 SSD drives to work with my Mac Pro for Windows 7 Ultimate 64-bit.

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Mac Pro :: Unable To Know MP 08 Raid?

Feb 24, 2008

Ive heard conflicing statments that the raid is software/hardware. anyone know for sure what it is (Im not talking about that card you can buy).

If it is software raid does this take a toll on the processors? is it serious or does it not matter at all.

IF it does matter. should I buy a exteran raid card? is there a mac compatible one. I just need basic raid0.

I just bought 2 samsung spinpoint F1 750s in anticipation of my new mac. But just want to make sure that raid is a wise decision.

for those who are thinking about replying about the dangers of raid. I know. I have time machine. if the raid goes down then so be it. such is life. I will have backups.

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Mac Pro :: Unable To Know Raid 1/0?

Nov 8, 2009

OK I do some Video Editing and Motion Graphics with FCP and Adobe After Effects.

I have a Mac Pro 2009 with 4 1TB Drives and 2 1TB Lacie Fire Wire 800 Drives.

This is the setup i have

1st Drive Mac OSX

2nd Drive is Windows 7 OS

3rd & 4th Striped and Mirrored to the 2 Lacies External Drives that are Striped. (raid 1 + 0)

My first question: is this a bad system? should i set it up a different way?

Second: is If a Drive goes out in the Raid 1+0 how will i know and how can i put a new drive in to fix it? How does this work?

Third: I set the RAID up with disk utility, is this ok, bad or good?

Fourth: IF the the OS Drive goes out will and i replace it and format it, will the RAID 1+0 Still be there? some where i read that its OS dependant?

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Mac Pro :: Hdd Recommendation For RAID?

Feb 19, 2010

I've never set up a RAID before. I'm about to purchase an 09 MP through Apple and was looking at the Apple and CalDigit RAID cards before I started reading these forums. If the experts are saying that the Areca ARC-1212 works better than both of those at half the price, I'm sold.

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Mac Pro :: Found An Interesting Raid Box

Oct 7, 2010



well it is a newer piece of gear came out in 2010. uses a different raid engine. The JMB393 CHIPSET. IT IS SMALL low cost. I may buy it and test it out. uses 2.5 inch drives. 5 wd scorpio blacks run about 300 bucks and this is 130. if you get fast read /write over 200mb/s it may be a good piece of gear for some.

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