How so I break a raid mirror yet retain data?

I have 2 500g SATA drives on my Mac Pro3.1. They were set up by a friend as a raid mirror using the disc utility software. My question how can I break the raid "mirror" and use these harddrives as individual harddrives???
Thanks
Rich

From DU's Help:
*To delete a RAID set*:
Back up any important files.
In Disk Utility, select a disk in the set that you want to delete, and click RAID.
Select the RAID set.
If you’re deleting a mirrored RAID set and you see a Convert button, click it to convert the RAID set from version 1.0 to version 2.0.
Deleting a version 2.0 mirrored RAID set leaves a usable copy of the set’s files on each disk. Deleting a version 1.0 set leaves the disks unreadable.
Click Delete.

Similar Messages

  • Got new miniMac servers with 2x750GB drives. How to setup and confirm RAID mirror?

    Literally just got shiny new miniMac Server with the dual 70GB internakky hard drives/disks with
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    Want nothing fancier than 2-nd drive is exact duplicate of 1-st drive at all times.
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    Regards,
    Paul T
    emai: [email protected]
    Apple ID:  N3UD
    Phone: 610-613-0610

    A. What are you adding to the RAID: a partition or a hard drive? You can only add hard drives to a RAID. RAID Utility should confirm that your RAID is working
    B. No, I don't think so
    C. It's because you haven't got RAID hardware.
    D. Time Machine is a backup system in external drives. If you want, you can do backups in a external hard drive.

  • How to restore a software raid mirror after a drive failure

    i set up a software raid mirror with two hard drives in a mac pro. then one failed as reported by disk utility. i replaced the drive. it does not seem possible to restore this raid short of copying the files to a third location and then erasing and establishing a new raid. is there a way to simply "restore"?

    Question: Do I need special software to administer the Mac Pro RAID Card or the Xserve RAID Card?
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    This article suggests using the Make Spare command:
    RAID Utility 1.0 Help > If a Disk Fails
    Message was edited by: Grant Bennet-Alder

  • How do you break a RAID 1 created in Disk Utility and retain data?

    Good Morning all !!
    Quick subject question. 
    Background:  I have 2-3 TB of important data that i use only rarely.  I purchased two 4TB external drives.  I could not use a 2 drive raid enclosure because of the fan noise in the studio.   I selected 800 firewire fanless enclosures.  The technican talked me into using the Disk Utility Raid 1 in Mountain Lion OS.
    Problem:  I only plug them in when needed probably once a week.  The raid rebuilds every time I use the raid.  That takes about a day.  This arrangement is less than ideal.
    Question:  Can I break the raid and still have the data intact on 2 separate drives?  Of coarse I would do it when they a rebuilt.
    Thanks.
    Mike

    Good Morning all !!
    Quick subject question. 
    Background:  I have 2-3 TB of important data that i use only rarely.  I purchased two 4TB external drives.  I could not use a 2 drive raid enclosure because of the fan noise in the studio.   I selected 800 firewire fanless enclosures.  The technican talked me into using the Disk Utility Raid 1 in Mountain Lion OS.
    Problem:  I only plug them in when needed probably once a week.  The raid rebuilds every time I use the raid.  That takes about a day.  This arrangement is less than ideal.
    Question:  Can I break the raid and still have the data intact on 2 separate drives?  Of coarse I would do it when they a rebuilt.
    Thanks.
    Mike

  • [RAID 0 issue] - K7N2 Delta ILSR:how can i save my RAID-0 SATA DISK datas

    Hi all, as a new member, i have to underlign the fact that this forums' members are very active and helpful ( personally, i thank the front usb issue post author    ).
    I've an XP on a single SATA RAID-0 disk ( Promise Fasttrak 3xx duno ), since a few days, i think that the DRAM controller is KO because the mobo doesn't accept DDRAM anymore ( DDRAM is OK on other PC ). The Mboard makes long & regular beeps and i have no Video ( no BIOS & no POST ), the D-bracket indicates  no memory module or memory damaged ( case 4, led 4 is the only green ).
    If u have an idea to help me..
    If there's nothing more to do, how can i recover the HDD's datas ? They are very important..i've heard that the disk should be plugged on the same raid chipset ( the better is the same Mboard )
    Please can you help, and sorry for my French-english   
    EDIT: I'll fulfill w/ more specs this WE.

    Just plugging/unplugging the memory somethime solves the problem. You could have had a bad insertion or just dust in the slot. Good luck with your working computer
    I already answered your RAID concerns. RAID0 with only 1 HDD is no RAID at all, just a software trick to force the controler to use the drive.
    Quote from: frenchy2k1 on 02-April-05, 04:15:32
    If your drive is raid0, but only 1 drive, it is no RAID at all, so it should work like any disk on any computer and be recognized normally.

  • How do I break a mirrored Raid in disc utility?

    I have two 2.5 TB LaCie Biggest S2S external drives that I mirrored using Apple's Disc Utility. Now I would like to break the raid to free up Drive B without compromising the data on Drive A.
    I have been told I could just unplug Drive A, erase and reformat Drive B, then plug Drive A back in... but would appreciate to hear from someone who has done this before and can confirm this is the right way to go about it.
    Many thanks.

    Thanks. I would do that, but when I click Delete, it gives me a warning that says:
    Deleting a RAID set will destroy all information on the all the disks of the RAID set.
    Are you sure you wish to delete the RAID set?
    This makes me nervous, as I can't afford to have all information on both disks destroyed. Are you saying it won't destroy my data on both disks?

  • How to separate drives in a mirrored RAID without losing contents?

    Perhaps senseless questions (non-issues), I'm not sure. Better to ask than to regret a stupid move ...
    I have an external mirrored RAID array (running 10.4.11) which is generally my startup volume(s) for a G4 Mini. Obviously, I can also boot from the internal drive.
    1. What happens if I disconnect them from each other (firewire cable) ? Is the drive that remains connected to the CPU still accessible?
    2. If I (somehow?) "Undo" the mirrored RAID set, is data on either or both drives lost or do the contents remain intact and accessible?
    3. If drive contents remain intact and accessible, then how does one "undo" a RAID set" ? Disk Utility "Help" and several forum searches have not been helpful (void of all pertinent content).
    My apologies if these are "stupid" questions and thanks in advance for informed responses.

    thanks - nice to know
    However - when I open DU, select this raid set, choose the RAID tab, I see NO option of "delete" - only "erase" button. Perhaps I need to (re)start from a different drive.
    IMO neither one of those terms is exactly intuitive for uncoupling a mirrored set. I do not want to delete or erase anything, just uncouple them so they are once again independent drives (without loss of content). BTW, since I typically boot (start) from the current set, I presume that either drive (once decoupled) will also be boot-able with preferences etc. persevered!

  • How do i break the mirror ?

    My root and var are mirrored , My server panic'd and i ran fsck on my filesystems but still cannot bring up this server how do i break the mirror ?

    What are you using?
    If it's DiskSuite then use metadetach, you will have to force this though. Also check your metadb's as you need 50% or more to be in a good state (this may be your problem).
    #metadetach -f d* d# (* is the mirror name and # is the submirror slice)
    #metadb
    #metadb -d /dev/dsk/c*t*d*s* (to clear the metadb's on this disk)
    To reinstate the metadb's you need to run:
    #metadb -a -c <how many you want> /dev/dsk/c*t*d*s*
    To reinstate the mirror it is:
    #metattach d* d# (same numbers as above)
    If Veritas just use option 5 of vxdiskadm.

  • RAID mirror with software utility caused kernel panic every time

    Using disc utility to make a mirror of 2 drives, click create and i get kernel panic and have to power off machine. if i try to start the machine with either of the two disks in it (together or individually) i get same kernel panic and have to power off.
    The disks are in an external storage array (sonnet d500). I have a second storage array with raided disks in and i have raided disk inside the mac too. these all work fine..
    originally 2 weeks ago i had the 2 disks working in a group of 4 disks set as a mirror of 2 striped disks. One disk in this setup failed and with this config you can never 'recover'or rebuild it - you get a degraded mirror and you can backup the data, but you must completely rebuild the raid again as the mirror of stripes never lets you add a new disk in again.period. not good.
    I replaced the failed disk and rebuilt the mirror of stripes. this lasted a day until a second disk failed (all 4 were bought at same time so i was kind of expecting that to happen once one failed).
    i replaced the second faulty hdd and thought about my disk usage and decided i would not make another mirror of stripes and i would make 2 mirrors instead for safe-ish storage and then transfer data to a striped raid set for editing from instead of direct from the mirror of stripes volume.
    i tried to delete the raid but got a kernel panic
    if i started the machine with any of the 4 disks i would get a kernel panic.
    i moved the disks one by one into an older G5 running Tiger and managed to erase the raid info on 2 of them. The two new ones had some strange raid info and the Tiger machien thought there was an extra disk in the machine and would not erase or partition or allow me to destroy the raid whatever i tried.
    I will be moving these now into an old XP PC to try to erase the boot records etc and erase them to be able to use them again in either mac pro or G5. painful..
    so.. i ended up with 2 erased drives and have 2 new drives with dodgy raid info that causes kernel panics on the leopard machine and wont go in the Tiger machine.
    The two erased drives are what ive now been trying to use in the mac pro to create a mirror - this now caused kernel panics when creating the mirror to start with and when installed in the machine at all. so i will be erasing them again in the tiger machine soon (its busy erasing with zeros another new disk that i added to the Tiger machine 2 weeks ago which seems to have some fault when raided!!! but thats another story).
    so.. is anyone else having problems with creating basic mirror in 10.5.4 or is it just me??
    i have a sonnet tempo e4p card with 2 external sata disk enclosures, latest firmware for the e4p card. all other previously existing raid volumes are working fine. i have one set of 2 striped disks, one set of 3 striped disks and one set of 2 stripes which are mirrored - all happy and working fine. but i cant make a new mirror of 2 disks...
    I phoned Apple support and they said all raid info was kept on the disk itself and nothing on the actual machine and suggested i take the machine to an apple care centre for some tlc (although its disk i am having a problem with). since all my other disk arrays work fine i don't really want to rebuild the whole machine from scratch if i can avoid it.
    Any suggestions of what i can try ??

    well it turns out the new disk i bought just werent any good. my g5 powermac raid mirror issue was related to one new disk with lots of bad blocks (speed tools showed that up) so i have learnt my lesson on cheap non raid disks for raid..
    am waiting on a couple of new ultrastar enterprise disks to tuen up so i can go back to the macpro and try to add a mirror again.
    i am still stuck wih several new disks that i cannot format now in the macpro on leopard or on the g5 powermac with tiger.
    ive tried softraid and that cant do it, speedtools pcformat util cant do it, disk utility crashes when i try to eras them and diskutil from termianl starts then doenst get anywhere and my pc sata card doesnt work so my last resort pc option still doesnt help me clear the partition map on these drives - ones that diskutility on leopard made for me - and drives which still cause kernel panics on the macpro if i put them in it..
    here is what diskutil says on my g5:
    /dev/disk0
    #: type name size identifier
    0: GUIDpartitionscheme *465.8 GB disk0
    1: EFI 200.0 MB disk0s1
    2: Apple_RAID 465.4 GB disk0s2
    3: Apple_Boot 128.0 MB disk0s3
    /dev/disk1
    #: type name size identifier
    0: Applepartitionscheme *233.8 GB disk1
    1: Applepartitionmap 31.5 KB disk1s1
    2: Apple_HFS Macintosh HD 233.6 GB disk1s3
    /dev/disk2
    #: type name size identifier
    0: *465.4 GB disk2
    /dev/disk3
    #: type name size identifier
    0: Applepartitionscheme *931.5 GB disk3
    1: Applepartitionmap 31.5 KB disk3s1
    2: Apple_HFS backup1T 931.4 GB disk3s3
    /dev/disk4
    #: type name size identifier
    0: Applepartitionscheme *931.5 GB disk4
    1: Applepartitionmap 31.5 KB disk4s1
    2: Apple_HFS tempi 931.4 GB disk4s3
    disk0 is the one with the bad partition info.
    it thinks it has a double raid as the console shows on startup:
    (both store45 and cache it thinks are on this disk - cache was my old mirror of stripes set on other machine, store45 was new name for my mirror, so seems like it hadnt deleted the original raid partition info before making new info which now kernel panics)
    Jul 18 18:48:05 localhost kernel[0]: AppleRAID::degradeSet - starting the set "STORE45" (B9C48619-6B2C-4547-A01E-4864754EA7E2).
    Jul 18 18:48:35 localhost kernel[0]: AppleRAID::degradeSet - starting the set "CACHE" (64F914A5-5556-4A44-AEE2-DC437868766B).
    Jul 18 18:48:35 localhost kernel[0]: AppleRAID::completeRAIDRequest - error 0xe00002c2 detected for set "STORE45" (C0E139A4-2A6D-49C6-8F77-202AF7F9285D), member 50207BE5-E487-410E-8E8E-C4C4DCD2687B, set byte offset = 999527018496.
    Jul 18 18:48:35 localhost kernel[0]: AppleRAID::completeRAIDRequest - error 0xe00002c2 detected for set "CACHE" (64F914A5-5556-4A44-AEE2-DC437868766B), member C0E139A4-2A6D-49C6-8F77-202AF7F9285D, set byte offset = 999527018496.
    so currently i have 2 new 500gb disks which cant be partitioned back to anything at all on either machine. looks like i will have to buy a new pc to reformat them..
    any suggestions of how to clear the partition map info and get them back to freespace ??

  • Can a boot disk be converted to a raid mirror without reformatting?

    Today the the original 250Gb SATA drive in my G5 started making some awful clicking sounds and seems beyond recovery. Backups are about 2 weeks old, not too bad.
    I replaced that with a new 300 Gb drive and reinstalled everything. I'm thinking of adding a second 300 Gb driver and mirroring everything.
    Can I simply add the new drive and create a RAID mirror, or do I need to reinstall everything after creating the mirror? I wasn't able to find anything that mentioned that process.
    Thanks,
    Michael
    PowerMac G5 Dual 2.0 GHz   Mac OS X (10.4.3)  

    Problem with mirrors is it instantly copies everything that's written to the first drive and people have had problems booting from a mirror.
    What you need instead is to auto-clone your boot drive occasionally and make daily auto-backups of certain folders.
    This way not only do you have a hardware protection, but software protection as well. You can go back to a previous OS version if you need too, you can boot from the clone if you need to, even reverse clone.
    So you have more flexability, mirroring is good for one time data captures that a hardware failure is not a option.
    A great piece of software clone/backup is Deja Vu
    Read how to do this and more text file here

  • How to GET RID of RAID and get back to IDE??

    Hi,
    I have a great Z800 Workstation with a 1.5TB HDD running Win7Pro-64. I've been using an 128GB SSD cache (Synapse/Dataplex) for about a year with no trouble, but stupidly thought that Intel's RST (Rapid Storage Technology) would do a better job, for writing in particular. So I installed RST... and run into touble.
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    I have some bad news for you.
    If there is an actual RAID configuration present, then there is no turning back.
    Breaking a RAID set destroys data on the set and makes it unbootable. That is why you are seeing the BSOD. If you kep playing with it, eventually it won't even boot up in RAID.
    That means starting again from scratch with a new OS install. 
    ****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
    2015 Microsoft MVP - Windows Experience Consumer

  • Advice needed installing XP Pro onto RAID Mirror with XP Home on IDE already

    Hi Y'all,
    I have the rig described below.
    Currently, I'm running Win XP Home SP2 booting on the 80gig IDE drive, with another partition on it holding my files.
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    I had thought of doing it this way:
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    Just to show that I am really confused, advice I've read in the Windows XP Forum says I should break the mirror before doing trying to install any OS to a RAID array and use just one of the physical 120gig SATA drives to install XP Pro onto. Once this has been done I should rebuild the mirror and the drives will automatically become mirrored once the data has been duplicated to the 2nd SATA.
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    Advice I've already read on the forum here has only confused me further because:
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    b) it doesn't deal with my exact circumstances.  
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    An update on the situation.....
    I am trying to install Win XP Pro SP2 (slipstreamed) onto a RAID Mirror of 2 Hitachi Deskstar SATA drives on my MSI K7N2G-ILSR. This is the exact procedure I've followed:
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    I've tried it every which way.
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    1 SATA drive striped array
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    The only difference is if I use the original Win XP Pro disc (without SP2 slipstreamed) when the error message changes to:
    File \WINXP\fasttx2k.sys caused an unexpected error (18) at line 2108 in d:\xpsp1\base\boot\oemdisk.c.
    In a thread here there is mention of an error in a file but it isn't directly related to my mobo, so I am reluctant to fiddle with the file unless someone can explain clearly what needs changing. I'm just trying to find the thread at the moment.....
    This is the text contained within txtsetup.oem:
    [Disks]
    d1 = "Promise FastTrak 376 Driver Diskette", \fasttx2k, \
    d2 = "Promise FastTrak 376 Driver Diskette", \fasttx2k, \nt4
    d3 = "Promise FastTrak 376 Driver Diskette", \fasttx2k, \Win2000
    d4 = "Promise FastTrak 376 Driver Diskette", \fasttx2k, \WinXP
    [Defaults]
    scsi = FastTrak_TX2K_xp
    [scsi]
    FastTrak_TX2K_xp = "WinXP Promise FastTrak 376 (tm) Controller", fasttx2k
    FastTrak_TX2K_nt5 = "Win2000 Promise FastTrak 376 (tm) Controller", fasttx2k
    FastTrak_TX2K_nt4 = "WinNT Promise FastTrak 376 (tm) Controller", fasttx2k
    [Files.scsi.FastTrak_TX2K_xp]
    driver = d4, fasttx2k.sys, fasttx2k
    inf    = d4, fasttx2k.inf
    catalog= d4, fasttx2k.cat
    [HardwareIds.scsi.FastTrak_TX2K_xp]
    id="PCI\VEN_105A&DEV_3376", "fasttx2k"
    [Files.scsi.FastTrak_TX2K_nt5]
    driver = d3, fasttx2k.sys, fasttx2k
    inf    = d3, fasttx2k.inf
    catalog= d3, fasttx2k.cat
    [HardwareIds.scsi.FastTrak_TX2K_nt5]
    id="PCI\VEN_105A&DEV_3376", "fasttx2k"
    [Files.scsi.FastTrak_TX2K_nt4]
    driver = d2, fasttx2k.sys, fasttx2k
    inf    = d2, fasttx2k.inf
    [Config.fasttx2k]
    value = "", Tag, REG_DWORD, 1
    I've also tried the following:
    Change Boot sequence to CD-ROM> SCSI> HDD-0
    Delete txtsetup.oem from floppy - Setup then says it's missing
    Copied original drivers from nVidia driver & utility disk
    None of these things has made the slightest difference
    Need further help please!

  • K9A2 Platinum SB600 RAID Success Yet?

    I have been monitoring this forum for suggestions on how to successfully create a RAID 1 on the SB600 controller. I haven't found an answer yet.
    I posted a question earlier this month and received several good suggestion on how to configure my new build for home High-Def video editing. Namely, using SAS drives and changing out my Ultra PSU. I have made the purchases and am now ready to install them and configure the system.
    This is what I propose:
    1. Use a 73GB SAS 15k drive for OS (Vista Home Premium) and my editing software (Adobe Premiere Elements 4.0) on Promise T3.
    2. Use another 73GB SAS 15K drive for a scratch disk for my working video data files (typical project files average 13GB) on Promise T3.
    3. Use 2 x 320GB WD Caviar 7200 SATA 300 drives on the SB600 in a RAID 1 for other data files (Office 2007, wife's pictures, etc).
    4. Use a 1TB external HD on Promise T3 (if possible?) to back up everything.
    My question is, has anyone been successful yet in setting up RAID 1 on the SB600 controller? If so, HOW?
    Thank you.

    I finally got Windows to recognize the new SAS drive after I formatted and partitioned it. I restored the disk image (1 partition and MBR) to the new SAS disk. I restarted and at POST I entered BIOS to change the Boot sequence to select the RAID array. I then shut down and physically disconnected the prior  C: disk from the SB600 controller. I tried to boot to Vista. About the time the Vista spash screen was to appear there was a very brief blue flash on the monitor followed by a black screen where the system was POSTing again. It did this 3 or 4 times. I then entered the Promise FastBuild utility to check my JBOD array. It showed up just fine and said it was functional. I exited to BIOS and checked the boot sequence again. My RAID array wasn't listed in the boot sequence nor was it available to select from when I tried to change it.
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    2) If so, how would I go about that? Would I still have to do the FastBuild thing? Install drivers for the T3 while installing Windows?
    3) Quadrifoglio Verde, you say you have an XP boot drive on the eSata port on the T3. How does that work for you?
    4) Do you really have to wait for that whole FastBuild/scanning disks thing each time you boot? That's kind of annoying.
    5) Do you think my new SAS drive is bad? I do! Surely they can't make THAT much noise.
    As always, thank you for your help.

  • Splitting up a RAID mirror pair?

    My QuickSilver dual-800 G4 won't boot. It has 2 internal drives that are configured as a RAID mirror (with Apple OS X Server RAID software).
    While it's in the shop, can I pull one of the hard drives and put it in an external FireWire enclosure, allowing me to boot my backup Mac from it and access all my files? Will the QuickSilver boot from the remaining half of the RAID set until the two are reunited? When I rebuild the RAID, how do I specify which drive has the master data set?

    Yes.
    Please refer to this recent thread:
    https://supportforums.cisco.com/thread/2145958?tstart=0

  • Rebuild Raid mirror

    Server 10.3.9
    Someone bumped my middle drive and degraded the Raid. I tried to rebuild itt this morning but it just locked up. I can't start disk utility when the "good" drive is connected and if I look at server monitor it shows that that drive is rebuilding the raid "0 percent"
    I am beginning to suspect that despite my being careful I got the drive numbers screwed up and selected the "good" drive number as the mirror and its trying to rebuild off a drive that doesn't exist (or something like that)
    Anyway I want to stop this drive from from continuing and just format and restore from backup but, as I mentioned, I can't get into disk utility (or diskutil) while the "good" drive is connected. Anyideas on how to halt the process and let me reformat?
    Bruce

    I believe you must enable that option when you create the RAID. The option does not remain enabled if you check it after the fact, at least it doesn't on my system either.
    According to the DU Help:
    If you are creating a mirrored RAID set, choose whether to rebuild disks automatically with the RAID Mirror AutoRebuild checkbox.
    Message was edited by: Kappy

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