Software :: RAID 5 Failure - How To Fix It
Dec 5, 2010
Intel Mac Pro with Snow Leopard, 4 internal 2tb drives configured as a RAID 5 using the Apple RAID card. One of the four disks, always the same one (#4) occasionally drops out of the RAID and becomes a roaming disk instead of a spare. I get an error message from RAID utility telling me the array has failed, and when I look in the utility, the naughty disk isn't visible. Only disks 1 through 3. If I restart the machine the 4th disk appears but is listed as roaming. I can use the pull down menu to "Make Spare", thus reassigning disk 4 to the RAID set. It takes several days to re-establish itself as part of the RAID.
But then a few days later the same disk drops out of the RAID again. Is this a hardware problem with the RAID card? Or is there a software fix for this behavior?
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Oct 1, 2008
I have a single boot disk with just the apps on, and 2 disks in a software mirrored RAID in which I keep all the important stuff.Its just occurred to me, if the boot drive fails won't the software RAID be destroyed as well?Or will it be easy to recover the data off one of the previously RAID1 disks, when the new boot drive is installed?
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May 13, 2012
Macbook Pro won't boot. Symptoms preceding failure included failure to open Firefox. When trying to cold boot I can get as far as the start-up sound, the Apple logo, and the spinning whieel (spins for a bit but not for very long) and then major failure. Not running Liom.
Info:
imac 10.1, Mac OS X (10.6.2), also have macbook pro running os 10.5
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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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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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Feb 14, 2009
I have a two-month old MacBook Pro at version 10.5.6 and have successfully done software updates several times. I have access to the internet over an Apple Airport via a cable modem.
Recently, I noticed that all my software updates fail with the following dialog:Software Update can�t connect to the update server. Make sure you�re connected to the Internet, then try again.The console reports the following:2/14/09 7:32:01 PM Software Update[1467] Error Domain=NSURLErrorDomain Code=-1004 UserInfo=0x8b0f80 "can�t connect to host" I searched on the net and found that others have had this problem on the net and followed their suggested advice (to no avail) to delete com.apple.softwareupdate plist in ~user/Library/Preferences/~user/Library/Preferences/ByHost/Library/Preferences/
I have also run Onyx & Yasu. But that did not help either.
Finally, we have another MacBook Pro - about 1.5 years old that is not having this problem.
Does anyone have any recommendations which would allow me to successfully perform updates?
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Oct 27, 2010
I've recently attempted to install 2 sticks of 2GB RAM into my MacBook Pro, but unfortunately had jammed one stick in the lower RAM compartment (Apparently I forgot to enter it at 45�) and had a rough time getting it out.
The RAM stick is busted and had to replace it, but I'm quite sure the slot might suffered a bit.
What are the signs of RAM failure?
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Oct 3, 2006
I have an older 15" G4 Powerbook (before the recalled Powerbooks with the RAM slot failures) that has recently been experiencing some speed issues. To my dismay, when I checked my 'About This Mac...' I no longer had 1GB of RAM, only a lowly 512 MB. Tonight I sat down and started swapping and removing my two sticks of RAM and as it turns out, something is up.
With a 512 stick in the lower slot, System Profiler tells me I have 512 MB of RAM and that the upper slot is empty. When I put the other stick in the upper slot (leaving the lower one in), System Profiler now says I have 512 MB of RAM and that the lower slot is empty. Does this look to be a (out of warranty) logic board failure? Is there anything else I can try to do? On a related note, when removing the screws from the RAM panel on the bottom of my PB, one screw fell into my Powerbook, never to be seen again. Is this going to cause any problems down the line?
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Dec 11, 2008
The string of problems I've encountered started a few days ago. I normally let my imac go to sleep by itself but, on this occasion I told it to sleep via the apple menu. When I awoke the imac the screen was frozen. No mouse movement, no clock movement, nothing. At this point I turned the power off and back on again. It didn't get past the white screen (before the gray with apple logo). I then tried resetting the PRAM, booting in safe mode, and booting from my os disc. Nothing worked.
After several tens of tries it magically booted. It stayed active long enough for me to back up all my data (transferring at least 100GB), reformat the hdd, reinstall leapord, transfer data back, and use it until I let it sleep again.
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May 14, 2009
I've been having intermittent connection problems with Comcast since February. Comcast can't seem to diagnose or solve the problem. Each time they get my connection back up, it goes down again a few days or weeks later.
I switched to Mac last August, with little difficulty. Yesterday, after my connection went down *again*, a "Mac expert" at Comcast told me that this happens with him a lot too. He said that it may be something I just have to live with, implying that it was a problem with Mac users.
Well, I don't have to just live with it, and I've decided to cancel my Comcast subscription if their last fix (a new router/modem) doesn't hold up. But I'm curious, has anyone here ever heard of such a thing? The excuse doesn't make sense to me, since I didn't have connection problems for the first six months I had my Mac. But in February, Comcast switched me to new (better!) servers. I wonder if that's the issue.
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Aug 31, 2009
s title says, the little application that works fine under leopard "mirage" which would make your dock transparent doesnt wor under SL it just tells me instalation failure anyone know how to fix that?
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Oct 21, 2009
I have been a Mac convert for the last 18 months and am the proud owner of a Macbook 4.1 Dual Core, 2.4GHz using MAC OSX v 10.5.8. For no apparent reason, neither the Keyboard or the Touchpad respond and I end up using a Mighty Mouse and Wireless Keyboard which work perfectly ok. To make matters worse, this issue comes and go's without warning. I can go two months with everything ok, then suddenly it all stops working and then suddenly it's all ok again. It is almost as if there is a way of disabling these functions which I have inadvertently done. I have re-loaded the operating system which has not achieved anything.
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Mar 20, 2010
Stupidly installed this: [URL] wanting better performance from my Nvidia 8600M GT 512Mb. Was asked to restart after install & wouldn't boot (only getting the grey then blue screen in 10.6.2) Am now unable to boot up in anything other than Safemode. While installing update is gives the option to revert, tried this in safe mode but it ends in a fail. If it can revert then somewhere is a backup of the original driver yeah? Where is it & can restore it manually/rename it as the original? Tried to use TimeMachine but won't boot for me in Safemode.
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Apr 24, 2010
I have lost two Superdrives, and now this new one is acting up. I am getting the following error message after the verification has started:This disc can't be verified and might be unreliable. Try again using a new blank disc (error code 0x80020063). Could not open the data fork of "<unable to get file path>" (-43).
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May 7, 2010
I used SuperDuper to create a mirror image of my SSD boot drive on one of the partitions on the external drive. Thinking it wise to actually check to see if the partition would boot, I used System Preferences to point to the new boot drive and restarted the ol' 2008 8x2.8 Mac Pro.
All seemed well with the startup from the new boot device. But when I tried to go to System Preferences on this system, the app failed without ever initializing a window.
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Jul 21, 2008
My problem is that in a morning when i turn on my mac G5, it lights and then fade and also make a sound like PAC.
But is it from the power supply and also how to avoid this accident.
I just send it to the seller Apple to repair it, but i need to wait, maybe got it within 1 or 2 weeks.
my Second problem is that if at night, i let my mac G5 auto boot, anyone can tell me if it may got this problem same the first one when my G5 turn on by itself.
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Mar 2, 2012
cannot get Migrate from PC to iMac working.The iMac can see shared folders on PC, but the PC cannot connect to the iMac.Both machines share wired router. I can ping from each machine to the other, the PC sees the iMac in the workgroup but cannot connect.Â
I need Migrate to bring over 4 Outlook Express folders (mailboxes) that were left out after two attempts by the apple store to migrate my doc's, photos and email. There is a utility called "Belkin Switch-to-Mac" on both machines.Â
Info:
iMac, Mac OS X (10.7.3), From XP sp3 to new iMac
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Mar 14, 2012
After trying several times to upgrade to Snow Leopard and finding out, per a post here to the community, that my MacBook had a CD reader instead instead of a CD/DVD reader (you can see the whole drama here [url]..
'AmazonBasics USB 2.0 8x DVD Writer External Optical Drive (Black)' by AmazonBasics USB 2.0 External Slim DVD Writer
and tried to upgrade to Snow Leopard from that.Everything was going great - until the two minute mark. And then the external DVD reader kept spitting out the DVD. I kept putting it back in and trying it again.
After about 10 minutes of this, I restarted the computer. It started and got the flashing question mark sign. I started the DVD reader again, and after probably 20 minutes, it started installing SNow Leopard again. And probably at the two minute mark, I got the error message "An error occurred while installing Mac OS X."Everything is siting silently now. There's an error message and a spinning wheel on my screen. The reader is silent.
I'm convinced this is a power issue - the DVD reader/player is drawing power from the Mac, but obviously, it's not enough. A search of the house has found no power adapter that works with this DVD player. I'll be going to Radio Shack tomorrow and hoping against hope they have something. And I have an appointment at the genius bar at the Apple STar on Saturday.
Info:MacBook, Mac OS X (10.5.8)
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May 11, 2012
After installing OS 10.6.3 on my MacPro 1,1, I tried to update to 10.6.8 and then 10.6.5 and got an Installation Failure warning. I have since use Disc First Aid to correct system permissions, and still have Installation Failure. Have tried multiple times, same result.HD is 1 TB and less than 1/3 full.
Info:
Mac Pro, Mac OS X (10.5.8)
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Mar 12, 2009
so i got my 3 week old mbp 15 (which i dropped and dented) replaced today due to kernel panic/ram failure/apple store only had 1 memory stick in stock...
my question is, what causes ram failure? i dont want it to happen again, i didnt install any 3rd party ram.
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Apr 21, 2010
My 2.33GHz C2D MacBook Pro running 10.6.3 has suddenly decided it doesn't have an optical drive installed!
If I put a CD or DVD in the drive it will pull it in, spin but fail to recognise the disc. It is impossible to eject the inserted disc by any means - except by using a piece of cardboard to stop it spinning after a restart. I have tried data, audio and video CDs/DVDs.
System Profiler says I only have a hard drive attached to Serial-ATA and have no Disc Burning devices installed.
Has the optical drive failed? If so why does it still spin up if the computer doesn't know the drive is there? Does the fault lie elsewhere?
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