Mac Pro :: Raid 0 And 1 Across 2 Disks / 4 Partitions
Sep 27, 2008
So, please welcome me back. After 15 years (I had Mac Plus, LC and Quadra 650), I am back from the darkside. Bought myself a Mac Pro today. Yeah - I probably should have waited for nehalem, but my PC was getting flaky. Time for the every 9 month wipe/reload and I just didn't want to go through that again, so I jumped. Tomorrow I am moving drives into the MP. My questions is specifically about partitioning and Raid. I typically partition my drives about 1/2 way down the middle and give the 1st partition to high performance needs and leave the second for infrequent use of backups and storage.
Lets assume I have two WD6400AAKS (I have three actually). Ideally, I'd like to partition them like this:
WD1 Partition 1A (200GB) Partition 1B (400GB)
WD2 Partition 2A (200GB) Partition 2B (400GB)
Then (using Soft Raid)
- Config partition 1A and 2A as Raid 0 Striped (giving me 400GB high performance)
- And config partition 1B and 2B as Raid 1 Mirrored (giving me 400GB redundant backup)
(Yes - of course I don't want to access the mirrored drives when expecting high performance from the striped drives). I assume that once the drives are partitioned, the Soft Raid will simply see them as four different drives allowing me to configure them as described. But before dropping a few hours into this, I thought I'd let all you raid/hard drive experts give your opinion.
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May 25, 2009
I'm having a problem with my external RAID that I use between my G4 Laptop (10.5.x) and G4 tower (10.4.x). I downgraded the G4 laptop to 10.4.x so I can run Classic (kids educational software), and gain some speed. I backed everything up to my external RAID (two HD's RAID together). The downgrade install onto the laptop went perfectly. I went to restore some files from the RAID backup, and I got this error when trying to mount the external RAID: "the disk you inserted is not readable by this computer".
I just ignored the error and did not touch the RAID. I then re-connected the RAID to my G4 tower that had previously mounted successfully, and same error: "the disk you inserted is not readable by this computer". This time I started Disk Utility, and it sees the RAID and it's volume set, but it is "Locked" (see attached pics). I think I need to first mount it to change any "access control list" or permissions, but I can't figure out how to mount, and then change permissions/ACL.
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Dec 24, 2010
I have a hex with 4x 2tb istalled on regular Mac bays and one ssd on the optical bay. They(4x 2tb) are configured as a giant 8tb JBOD. Now I purchased 3x 3tb and a sata card for the extra sata ports. Is there a way to create another JBOD with the the new 3tb drives and in the near future get rid of 2tb ones and put the 3x 3tbs on the regular Mac ports without loosing the data. All JBOD will be and was created using Snow Leopard's disk utility.
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Nov 30, 2014
"My name is Shaun, and I am a mac-aholic"
I inserted 4 new 3TB disks into the bays of my Mac Pro (2012), and there is no RAID option for them.
How I got here:
Inserted the WD Red drives, and they were not initiated.
I "erased" the drives, gave them names, and they appear in Disk Utility in grey drives.
Went to set up the RAID, and move the drives into the RAID, but got an error that they could not be used.
It appears to me that disk utility is not allowing me to fully use those drives. I Have created RAID drives before with no issue in RAID1 with 3TB drives before on this machine. Am perplexed, I thought this to be the easy and simple part of my upgrade odyssey! Did I screw up the initialization? On all FOUR drives?
Now, if I click on the drives, the RAID option does not present itself.
FWIW, I am using OS X 10.9.5, on Mac Pro 5,1. I boot from PCIe card. My end goal is to create a 4-disk RAID 10 using the four SATA connections on the MP.
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Jan 9, 2011
I have a Early 2008 Mac Pro. I have the Apple Hardware Raid Card Installed. I have 4 2TB disks installed. Currently I've got the system disk setup in Bay 1 as a single disk. Then I have the disks in bays 2 through 4 setup as a raid 5. I've been thinking that I might be better off to make all 4 disks into a raid 5 array and then just make volumes for the system disk and my work disk. My goal is to have a system volume an a scratch/work volume for image and video editing.
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Oct 27, 2008
I own a PowerMac G3 with 2 hard drive disks. One is a 20gb and the other is a 40gb. I would like to combine the disks with a pseudoRAID type called JBOD. JBOD stands for 'just a bunch of disks.' It's not really RAID. What I'm after is to see these two drives as one 60gb drive. Is that possible? I'm running Mac OS X Tiger.
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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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Aug 1, 2010
I'm about to get a Mac Mini Server for audio, video, and graphic production, in addition to everyday productivity use. If in the same situation, which would you prefer?
1) to stripe (Raid 0) the two internal disks, or
2) use one as the install/OS disk and the other as the data/scratch disk?
(...assuming you have a 1TB external backup drive, and find FW800 to be much slower than internal SATA for a data/scratch disk).
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Mar 7, 2010
I have an iMac 2.4ghz with a 320g hd, that I partitioned 50/270 when I installed Leopard. I read somewhere to have the opp system partitioned and I have been kicking myself in the rear ever since. Too many apps and files want to run next to the opp system, so I'm starting over.I used time machine for a backup of the system (both partitions are showing) on my 1 TB iomega external hard drive (minimax). I partitioned the external 500/500, time machine/additional storage.So that is what I'm working with, now for the question:With my backup complete, if I do a clean install to the internal hard drive (320g) in order to remove the 50g opp/sys partition and just have one 320g internal hd; will my time machine be able to restore to a clean 320 without having the 50/270gig partition setup? If so will this be a somewhat simple process?
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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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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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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: http://www.lacie.com/support/drivers...r.htm?id=10053 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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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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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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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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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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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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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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Nov 27, 2010
I have a Macbook Pro Intel Core Duo (first generation of MacBook Pro released). I run OSX 10.6.5. My disk utility has detected a problem and says I need the install disks that came with the computer. Called apple and they said I could reboot from snow leopard or the upgrade.** Problem is that I don't have any disks with me except those that came with my brand new iMac. Can I use those to reinstall the system? Is there any other way?
**They also said that after 2007, the install disks that come with computers are keyed to that specific computer so I "might" not be able to use the disk to repair.
Additionally, and I don't know if this makes a difference but I have the airport/time capsule which backs up my computer for easy restore.
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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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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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Sep 4, 2010
Any 1 time free partition program that can create 2 partitions, one for Windows and 2nd for OS X in one USB HDD?
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Sep 14, 2010
What is the best way to read/write with NTFS partitions (internal and external drives)? I have MacFUSE already installed with virtual machine.
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Jan 10, 2011
my mac is for two people to use and two separate languages. When changing languages in system preferences to chinese, not everything will be in chinese, eg. applications, etc.Would I need to make two partitions and install two different language versions of OS X? Or buy a Chinese version of OSX?
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Feb 25, 2008
I have three Hard Drives installed in my Mac Pro. The original one and two aftermarket. They total around 850 GiB. I have them divvied up into 5 partitions. If I wanted to Mirror them onto ONE external 1TiB Drive, what are my options? Is it a backup only type of thing, or are there options to do a real time mirror like RAID-1?
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Jan 14, 2009
i need to merge partitions on external drive. one is empty, one is not. i tried with ipartition demo, but demo to them means you can just take a look at options and not actually demo them.
i do not want to pay for software since i will only be using it once FFS.any recommendations please?
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Mar 26, 2009
I have a MacBook with OS X 10.5.5 on it. I'm allowed to use my personal laptop at work, but they have said I must have dual-boot and only use the one partition while I'm at work, to access the programs I need to while at work. Everything must be completely separate (my personal stuff, and work stuff). Their software is both in mac and pc versions. Instead of using bootcamp and having a dual-boot option for Windows I'd like to instead have two OS X partitions to boot to, one for personal use, one for work. I tried using bootcamp and then loading my OS X DVD into the drive to create a second partition, and it won't work. It seems Bootcamp is made to work when only creating a second partition with Windows. Well, then I went to the mac store and spoke to a Genius and well they said it's something I need to make an appointment for and come in to do, because it's fairly complex.
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Jun 11, 2009
My machine:
- MacBook Pro (Pre-Unibody)
- 2.4 Ghz Intel C2D
- 4 GB RAM 667 Mhz DDR2 SDRAM
- 320 GB Seagate HD
I am trying to partition my hard drive into 4 partitions. However, I can't get Windows working with more than 2 partitions. I know that there is some way to get this to work, I just haven't been able to find the necessary hack/guide. To make matters more complicated, my Windows partition is set over 32 GB, in fact, it is about 80 GB. I'm willing to completely re-install everything and completely repartition my hard drive to get this to work. I just would like to know of a sure fire step by step way to get this setup working. 3 Partitions HFS+ and 1 partition for Windows XP SP3 = 4 partitions.
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Aug 13, 2009
I'm waiting for the UPS guy to deliver my 500GB Hitachi HDD. Basically what I want is:
3 Partitions:
50GB for Mac OSX (HFS+)
50GB for Win7 (NTFS)
400GB for Data and stuff... (HFS+)
and be able to boot with Bootcamp. Is it possible?
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May 15, 2012
So, I installed Lion, but here's how I did it. Downloaded from Mac Store. Created new partition. Rebooted and installed the new OS on the new partition Booted into new partition and deleted the old one completely. Now this is all fine except now I only have 300GB from a 1TB drive.
As you can see from the screenshot, I cannot adjust the size of the partitions and when I delete the newly created partition (Macintosh HD) I still cannot make the partition larger in size. Did I do this the wrong way around?
Info:
iMac 27 3.06, Mac OS X (10.6.2)
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