Degraded RAID, trying to repair integrity
We pulled a major bonehead move.
We were installing another server in the rack and we didn't have the xServe locked. Me and my employee both popped drives from our xserve at the same time and we degraded the RAID.
Setup: Dual G5 xServe, MegaRaid card, 3x300GB drives in RAID 5
I supressed the urge to immediately panic, especially since the server was idle when it got hosed. I powered down right away and booted of the install cd.
I used megaraid CLI utility to re-flag the drives as optimal and brought the server right back up.
I'm noticing some odd behavior and a bit of corruption, so I assume the RAID consistency is blown, I pretty much expected that to be the case.
The problem is, our backups are crap. I've been fighting with the administration for funding for a proper backup system for nearly a year and I've failed so far. Formatting and a bare-metal restore from tape is not an option.
I'm running: megaraid -chkcon 0 -start
.. and it's taking forever according to -status. The documentation is very lacking about what the parameters actually do so I'm in a bind. I can run the consistency check and have the server down for at least a day but what do I get at the end?
Can or does chkcon repair consistency problems?
Here's my options as far as I know, suggestions?
- Is there a way to repair the consistency of a degraded RAID volume?
- Should I backup what I can and scrub the RAID and then just restore what I can from current data and old crappy backups?
- Sould I try degrading, intentionally, the drives that went off line one at a time then using the megaraid utility to properly return them to online with a megaraid -rebuild pd (pd being physical drive)?
- Should I try the official suggestions for moving RAIDs from server to server? Apparently Apple suggests that you can move a RAID by pulling the drives, moving the card without drives, then booting to install disk and doing megaraid -destroyconfig, then shutdown, then put drives back in, then let card magically rebuild raid from meta. This sounds like trouble to me.
Any suggestions (other than don't leave my xServe unlocked.. especially when working in the rack)?
thanks,
Steven.
I was able to pop in the drives, boot off install DVD, and mark them as on-line. The server came right back up.
Similar Messages
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How can i repair a degraded raid?
All the instruction i have read seem to require a damaged disk, but my disks are OK...
Name: Data Mirrored
Unique ID: Data Mirrored2e749102dd1e11d8822a000d939c63fc
Type: Mirror
Status: Degraded
Device Node: disk3
# Device Node Status
0 disk2 OK
1 disk1 OK
xserve Mac OS X (10.3.8)Hi
I have seen this before, dont have an answer why but i can help you fix it.
You need someone to look at the front of the Xserve, notice which drive is active and whcih one is not (blue lights flashing) after you have determined which drive is not being used then just pop it out of the bay, wait a minute or so then pop it back in
Once inserted you will be able to run the disutil repairmirror ....... command to rebuild the RAID
Be very SURE which drive is not being used before doing this.
Ed -
Need help with RAID Card and degraded Raid-5 errors
Dear all,
I recently purchased a used Apple RAID card for my 2008 Mac Pro 8-Core. The installation went smooth, the card was immediately recognized and the battery reconditioned within one night.
So I started setting up a Raid Set with the 4 identical drives which I already used before as a software Raid. But each time the Raid Level-5 Volume is created, somewhat later the status turns red and the Raid is listed as "degraded"!
A closer look at log reveals:
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Of course, the drive is NOT removed, nobody touched the Mac Pro! Also I did the same procedure 3 times and the result was always the same.
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Hello
I have 2 XServe Dual Core servers experincing the same issue.
On initial setup I used 2-500gb modules to create a mirrored drive. Then installed the OS plus the applications that I am running. After a day or so the RAIDS were degraded. I formatted the the degraded drive and the rebuilt the mirror. Upon restart the raid was degraded again. I replaced the drive and the same issue again. I originally thought it was bad hardware on one machine but I am experiencing the same issue on both. Have not only reformatted but have replaced with 3 different drives on BOTH XServes. I even tried removing the Apple drives and replacing them with Seagate 500gb SATA drives off the shelf here without any luck.
Any ideas???
Thanks in advanceThanks for the Welcome.
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I will let you know -
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Upgrading Controllers firmware on a degraded RAID 5 array
Hi guys
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just bought a new pc and itunes will not open. I have tried thto repair and reinstall but still no itunes
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Make sure you know exactly which version of Win 7 you're running.
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Start iTunes - all should be operating well! Good luck ... -
Everything has been working great on my 939 fx-53, 2 gig Corsair XMS 3200Pro, 2 SATA Seagate 160s, raid 1, BFG 6800 Ultra until I accidently screwed with the bus speeds (I'm a complete moron) which locked up the system and shut down COM ports. Machine wouldn't boot, etc.
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Error 1310. Error writing to file C:\Config.Msi\356163.rbf when trying to repair Office 2010
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Trying to repair iTunes on Windows Vista will not allow to do so except to uninstall it
Trying to repair iTunes on Windows Vista. Will not allow me to do it. I've followed the instruction to select the programme in control panel, the select 'repair', unfortunately, the only option available to me is 'uninstall.' Therefore, I tried to uninstall with a view to reinstalling the whole programme but it wouldn't let me do this either because the .msi file could not be found.
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(1) Download the Windows Installer CleanUp utility installer file (msicuu2.exe) from the following Major Geeks page (use one of the links under the "DOWNLOAD LOCATIONS" thingy on the Major Geeks page):
http://majorgeeks.com/download.php?det=4459
(2) Doubleclick the msicuu2.exe file and follow the prompts to install the Windows Installer CleanUp utility. (If you're on a Windows Vista or Windows 7 system and you get a Code 800A0046 error message when doubleclicking the msicuu2.exe file, try instead right-clicking on the msicuu2.exe file and selecting "Run as administrator".)
(3) In your Start menu click All Programs and then click Windows Install Clean Up. The Windows Installer CleanUp utility window appears, listing software that is currently installed on your computer.
(4) In the list of programs that appears in CleanUp, select any iTunes entries and click "Remove", as per the following screenshot:
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Trying to repair permission and I always get this:
Permissions differ on “Applications/Safari.app/Contents/Resources/Safari.help/Contents/Resources/inde x.html”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
I even fresh install the system and every time I do repair the permission I always end up with this even though it said repaired.
I figure this is the problem my laptop, sometime it wont save files or documents and it goes in limbo and had to force shutdown and have to restart on the
booth drive to have it permission repair. I just updated to 10.9.3 and will see if this stop the crashing but repair permission notice is still the same.
Any feedback please....Thanks
Model Name: MacBook Pro 13-inch, Mid 2010
Model Identifier: MacBookPro7,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 3 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MBP71.0039.B0E
SMC Version (system): 1.62f7
Serial Number (system): 7302895ZATM
Hardware UUID: 0B62E320-214C-5EE8-9EBC-106E01BE083D
Sudden Motion Sensor:
State: EnabledAmanteDesign wrote:
Trying to repair permission and I always get this:
Permissions differ on “Applications/Safari.app/Contents/Resources/Safari.help/Contents/Resources/inde
I see the same thing since the general release of 10.9.3. This did not occur in prior versions. -
I have Adobe Acrobat installed as part of the CS6 suite.
It has stopped working (yet again -- it has done that three of four times over the last year).
I have spent days trying to repair it; etc. without any success.
The last time this happened, it was necessary for someone from Adobe to reinstall it entirely, if I remember correctly.
I give up. Can anyone tell me what I must do get the program to actually work?
I spend more time trying to get Adobe Acrobat to work, than I do actually doing my work.
My OS is Windows 8.1. My system has 16 MB of RAM, and hard disks are not overfilled.
I run update virus checker (Kaspersky) daily.
Cheers,
HughHi Hugh ,
Could you please tell what are the challenges you are facing while trying to access Acrobat ?
Do you get any error message ?If yes ,please share the screen shot of the same.
Please try the solution outlined here: http://helpx.adobe.com/creative-suite/kb/acrobat-failed-launch-30-days.html
OR
Try repairing it from Control panel, or try launching it with a different user account and check if it works or not.
Install the latest updates for Acrobat X from the link : http://www.adobe.com/support/downloads/product.jsp?product=1&platform=Windows
and check.
Let us know how it goes,
Regards
Sukrit Dhingra -
Hello there, am new here and very stressed, i have an Imac core i3 which is logging off itself after a few seconds of login, it goes back to the login menu where i put the password. I have tried to repair the os but my pioneer rom is not reading the disk. I press the :c" button on startup but its not picking up the disk in the rom, i have tried to put the disk in an external rom but same answer, am starting to think that my os disk is bad. Please help me.
Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of this exercise is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login. Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
*Note: If FileVault is enabled under Mac OS X 10.7 or later, or if a firmware password is set, you can’t boot in safe mode.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem(s)?
After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test. -
Attempted update to iTunes 10.5.2 failed on my Windows XP system. Now my phone is not recognized. I tried installing manually. I tried to repair using Add/Remove programs. Still get errors.
Try doing it in a WIndows Safe mode - Restart computer and hit F8 key right after your see BIOS check and choose "Safe mode with networking"
Do the SFC /SCANNOW again.
If that does not work, whilst in safe mode, download Free Malwarebyte software from CNET's Download.com. Install, update virus definition then perform a full scan. Remove if it did find some viruses or trojans. Restart computer.
Back to regular windows, do the SFC /SCANNOW again.
If that doesnot work, check to see if your Hard drive has errors or bad sectors
GO START BUTTON /COMPUTER, right mouse click OS (C:) and choose "Properties"
Choose "Tools" tab and under error checking, click "Check Now".
Make sure "Scan for and attempt recovery of bad sectors" is checked and click start.
Restart windows will perform the above task to fix errors This may take hours depends on how big is your Hard Drive
Good Luck!!.
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