Mac Pro :: HDD Options - Single Drive Or Raid0?
Sep 8, 2009
I'm having a hard time deciding what to do with my two open HDD bays in my Mac Pro.I know I want to add more storage, but I'm not sure if I should use Raid0 or not.I store most of my media on a server but wanted to store the following in my MacPro and would need more hdd space.Bootcamp - obviously can't store in serverScratch drive - would write handbrake encodes to this then transfer to serverIn all I'll need around 1.5tbI already have a 1.5tb drive and would only consider buying another to put them into raid0. Should I bother with raid0 for the increased speed or just use the 7200RPM 1.5tb drive I already have?
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May 27, 2010
I'm a graphics professional taking the plunge into a Mac Pro. After some research, this is my notional drive setup:??GB SSD Boot Drive in the optical bay2 x 1TB 7200rpm SATA in RAID0, partitioned for 1.Data and 2.Scratch (therefore <2TB data)I obviously need to make sure that RAID0 is safely backed up. I've got an online backup service in case my house burns down and I'll be backing up individual projects onto optical media, but I will of course want to Time Machine the Data partition of the RAID.Now, for that Time machine drive I can either create another RAID0 from the same kind of drives (with the risk that entails), or for about the same money get a 2TB 5400rpm (leaving a drive bay free for future use, possibly another backup).
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Sep 8, 2009
I have two 1.5TB HDs, RAID 0, as my itunes library. I use Time Machine to back up all my drive, but I also wanted to clone the RAID but only use a single drive as the clone. Will this cause any potential problems since its going from a 2 drive RAID to a single drive.
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Jul 14, 2009
I'm planning to replace my boot hard drive with a pair of RAID0ed SSDs. In order to familiarize myself with certain techniques I have build a software RAID0 from two 160 GB Maxtor SATA I hard disks. That went pretty much without problems. The two HDs are now sitting in position 1 and 2 in my Mac Pro.
The problem arises when I try to clone my boot drive onto the new RAID 0 drive. I was using disk utility and got an error message. Then I thought my fault was using disk utility from the HD which I wanted to clone and booted from the Leopard install disk. I then used disdk utility from that source to clone the HD boot drive to the RAID. Again I got the error.
What is going wrong? Do I have to approach this completely different?
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Dec 30, 2009
I want to reformat and install SL fresh and am getting an error when i use Disk Utility (booting from SL DVD) to delete the RAID0 config. The error is "invalid request".
I have 4x640 in Software RAID0 that i boot from.
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Nov 10, 2009
I've got a 2 drive 640GB Black Caviar RAID that I want to set up as just an OS and apps boot drive.
I realize larger block sizes have more through put but waste disk space, and smaller sizes save space but are less efficient.
My user folder (mail, media, itunes, video, docs) will be on a separate drive.
(1) So how do apps and OS files load at boot time and runtime?
(2) If apps like CS4 are large apps does it not make sense to set 256K as the block size?
(3) Or does OSX use many small files thus needing a smaller block size?
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Aug 11, 2009
I have successfully striped two SSDs in Vista Business-64 on my MacPro1,1. I have used Vista's data carrier administration program for this. As expected the array isn't recognized in OS X. So I cannot just dump a Winclone image on the array. That would have been much to nice!
My next strategy was a total backup with Vista's own backup program on another HDD. That went without a hitch. I then hoped that booting the Vista install DVD with the backup drive present and the RAID0 array would allow me to restore the backup on the RAID array. Unfortunately Vista will not recognize the array running of the install DVD. Loading AHCI or IMSM drivers will not change this situation.
It appears that you have to make the dynamic data carrier active if you want to install Vista on it. Unfortunately the data carrier admin program will not let me do this. I would do it in DISKPART if I knew it was possible and how to do it.
So the question is does anybody know how to install Vista Business to a dynamic data carrier? If I cannot figure out this soft RAID0 I will ave to buy a RAID controller which I thought I might avoid at this point.
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Sep 26, 2010
I just order a MBP 15" i7 that i will be using for mostly Photoshop work.I was wondering if anyone had any experience with single ssd vs two at 0 raid in regards to photoshop work and or similar apps? If there is very minor speed gains for 0 raid
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Aug 4, 2009
My current setup consists of my boot drive (250GB), a striped RAID (500GB) for storage and a 1TB Time Machine Drive.I have recently bought a new 1TB internal drive and would like to replace the striped raid with this drive, thus freeing up two 250GB drives - 1 which i will keep internally and the other will go into a external enclosure My question is can i just copy the files from the RAID to the new internal or do i have to use software to clone it?
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Jan 30, 2010
Im looking into a dual or 4 bay hard drive enclosure that has the following specs i.) quiet fanii.) feature each hard drive to be seen separately as single drive, NOT as 1 big driveiii.) firewire 800
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Mar 18, 2010
I'm still working out the details on purchasing a new MacPro. My Apple sales rep tells me that I can greatly increase the launch speed of applications and the system OS by purchasing 2 hard drives and using Disk Utility to stripe them together into a "software RAID". They claim it will be faster and more reliable than a single SSD. I know I've asked this question before, but the answers were over my head. I don't know anything about SATA raid cards, or SSD's except for their benefits. But I'm pretty sure I can stripe two drives together and make a software RAID.
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Nov 11, 2009
I have a Mac Pro 2008. I just got my second Crucial 256 gig SSD. Wanna make it a Raid 0 with my first one. Here are my thoughts.
Process 1:
1. Use disk utility to restore image of original Crucial 256 SSD to external USB drive
2. Boot up with SL DVD
3. Build Raid 0 using two drives. (do I need to 0 out?)
4. Restore image to Raid 0
5. Boot
Process 2:
1. Boot off DVD
2. Create Raid0
3. Use SL to restore backup from time Machine to Raid 0
4. Boot
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Aug 26, 2010
I am thinking about adding a pair of Sandforce SSD drives in RAID0 on my Mac OSX device. Since OSX does not support trim I am dependent entirely on over-provisioning and idle garbage collection to keep SSD drives in good shape long term.
My question is if you use two drives that support BGC in a software RAID0 configuration does the BGC still work as effectively as with a single drive long term?
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Apr 8, 2009
Is it possible to mirror a RAID-0 array to a single drive?
For example, I will be setting up 3x1TB on a RAID-0 (striped) array and i want to mirror it to one 1TB drive. Is that possible or do i have to resort to Time Machine ... ugh
and YES i've already STFA! no answers as of the start of this thread
[URL]
-edit i assuming Time Machine backs up the "volumes" and not the "drives"
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Aug 4, 2009
As we discussed in other threads it could be particularly advantageous to use SSD RAID0 arrays for dual or even multiple booting. With a decent amount of striped SSDs the idea is to run all your operating systems and applications with high speed. At least that is the theory. To test the idea I have decided to use two Maxtor 160 GB HDD in a very basic dual RAID0 array configuration for booting OS X and Vista-64 in AHCI mode.
Here we go:
First thing I learned is that you have to partition the HDDs prior to building your array.
Second thing I learned is that you have to keep it all in HFS+ to make it work.
So now I have used disk utility to create two equal size partitions in HFS+ with GPT on both HDDs.
Next I fused the two lower partions together for a first RAID0 array named 2R-Leo. Format is still set to HFS+ and RAID0 mode is selected.
Then I fused the two upper partitions together for a second RAID0 array named 2R-Vista. Here format is also set to HFS+ and RAID0 mode is selected.
With that done I exited the disk utility to get a fresh start on it. I then entered disk utility again.
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Sep 22, 2010
I'll be going with the OWC SSD(s) ExtremePro for the boot drive................ either a 2x60 OSX SW RAID 0 or single 120. I'd rather err on the side of safety but always looking for more umph If going RAID 0 would it be advised to go with a dedicated controller?My data drive will be 2x1T RAID 0.
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Dec 31, 2008
Compatible to PCI-e 2.0
Boot to Mac OS X with Mac Pro (2006-2008) Models
Boot to Single Drive or RAID Array
Well,finaly it's bootable and raid bootable.Does anybody know is ti bootcampable?I just come back from windows,I find I lost so much,I can't even use foobar2000 and my 9800gt.
I hope it will be a positive answer
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Jun 29, 2009
I have a 250GB firewire drive. I have a G5 iMac and an Intel iMac. I'd like to make bootable clones (about 60GB each) of each for off site backup, so two logical partitions. As far as I can see, the partition table scheme is determined at the physical drive level. But I need the logical drives to be Apple for the G5 partition and GUID for the Intel partition (please correct me if I am wrong) in order for them to be bootable. Is there any way around this, or do I need two physical drives after all?
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Sep 14, 2009
The title pretty much says it all: When booted in single user mode, I can't get my machine to recognize the USB drive. Here's what I did:
1. inserted usb stick (memorex 4GB traveldrive, msdos filesystem)
2. booted in single user mode (cmd+s after powering on)
3. mount -uw /
3. looked for usb device in /dev
4. ...it's not there! The USB drive shows up as /dev/disk1s1 after an ordinary boot, but in single user mode it's nowhere to be found. It's not just a name issue either: the list of devices that appear in /dev in single user mode is the same whether or not the USB stick is plugged in.
Even more confusingly, out of the 10(?) times I tried this it worked twice: /dev/disk1s1 actually appeared. mkdir /mydirectory; mount -w -t msdos /dev/disk1s1 /mydirectory worked fine, and I was able to read/write from the stick as usual. I have no idea what I did differently those two times. Does anybody know what's going on? I've got a MacBook2,1 running vanilla Leopard.
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Dec 26, 2009
i have Snow Leopard running in a RAID, and just a separate single drive installed for windows 7. Problem is, when i try to go to bootcamp assistant, it tells me that RAIDS aren't supported in bootcamp. I don't want to install it on my raid, just on the other single drive. Does anyone know a workaround or how to do this?
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Jan 14, 2010
I recently bought a 1TB hard drive... I am trying to partition it to be 250GB Mac Format and 750GB NTFS. The reason for NTFS format is because I work with ISO files and Blu-Ray movie files a lot that are well over the 4GB limit of FAT32/Mac formats. Is there a decent disk utility for OS X or Windows that can format a hard drive into both of these file systems? The built-in Disk Utility in OS X only does FAT, to my knowledge, so I need something else.
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Apr 27, 2009
I have a MacBook with Mac OS X and Windows Vista Pro installed. Having both of these OS installed as well as Xcode, this occupies a LOT of memory and there is very little else available. So, I have a 100 GB USB external drive. I am fairly new to the Mac and so need a little help. The USB port must be extremely sensitive. If anything barely touches the USB cord to the external drive, then Mac OS X cannot "see" the drive anymore and there is an error about properly ejecting a drive. The only way that I can get it to see the drive again is to boot into Windows Vista, restart and open Mac OS X again.
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Dec 30, 2009
I have a Macbook Air somehow has lost/ damaged the user DB as none of the none of the user accounts are available. In single user mode, I have checked the users in the password file and my username is not listed. I tried changing the root password but I was unable to logon. I tried deleting the .AppleSetupDone file, but it always hangs on trying to configure computer. I tried adding a user but im getting errors using dscl. My last resort is to just copy the user files using SUM and then reinstall. My problem is that I am unable to detect my usb drive in SUM. It does not show up when I do ls /dev/disk* but I do get a message when I disconnect the usb drive. I do not have an OS disk, nor do I have a superdrive with me. I just want to mount the USB drive and copy the files in SUM.
Additional info:
Macbook Air 10.5.8
External drive: Maxtor One Touch II 250GB
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May 15, 2012
I am trying to restore A single file from time machine to a new drive, I know how to restore the file so it gose to my mac but I can't make it restore to my new hard disk " Why would you need to do that I hear you Ask "GOOD QUESTION" well it would take about 7 hour to copy the file to my mac and the another 7 hour to copy the file to the hard drive (which is where I need it to be).what I want to do is save 7 of the 14 Hours it will take by directly restoring the files (of which I have a few) to the new hard drive?I am working with OSX10.5.8?
Info:
PowerMac
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May 13, 2009
I'd like to take one hard drive and back up 3 different Mac computers using Time Machine. The hard drive has the capacity greater than the 3 computers.
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May 4, 2010
my MacBook Air wouldn't boot up. After booting from the Install DVD and running disk utility, it said that there was a problem with the internal hard disk drive and that it needed to be reformatted and OS X reinstalled. I am now trying to backup some of my files onto a 1TB external hard disk drive using single user mode.
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Jul 20, 2010
My MBP has a 320GB harddrive with like 240GB used on it but I only have two 250 GB harddrives so you can see the problem I'm in. I would like to combine into a single virtual drive so that it can accommodate my Time Machine backups.
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Jun 11, 2012
Is it possible to backup multiple computers to a single external drive connected to an Xserve using Time machine? We have a Six TB external drive that we are connecting to an Xserve that has three drives. We want to backup the entire
Info:
Xserve, Mac OS X (10.6.8)
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Jan 25, 2010
The one in the G5 at the minute has not been working for some time, though it accepts the Install discs and Retail DVDs, but there you go.Will it install in the G5 and work? Doesn't seem to say anything about compatibility on the product page so I'm hoping someone here will know If not, any advice on what a good replacement drive would be? Not looking for anything special really just one that will accept discs!
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Mar 20, 2008
I just purchased a new 750GB Seagate FreeAgent drive. I hooked it up via FireWire 400, opened Disk Utility and tried to format it as Mac OS Extended (Journaled). It gave me an error message saying it was the wrong format (or something like that - I can't remember exactly). I tried every Mac OS option and it gave me the same error message.
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