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mm1582

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mm1582

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April 25th, 2006 13:00

Disabling Raid on PE 2600

Hello,
 
I have been searching desparately for a solution to the problem posted here
A firm  that deals with RAID recovery suggested that I disable the RAID using Configuration Setup. According to them, the physical droives would then be detected by their software and they claim it can be recovered.
 
Two questions [P L E A S E]
1. How can I disable the RAID?
2. Is it safe to disable RAID?  In other words, can be enabled again without any damage?
 
I would TRULY appreciate it if anyone could help me with this,
 
Many thanks
Mark
  • kai_kk

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    Posted April 26th, 2006 07:00

    Answer as below,
    1. Enter BIOS setting by pressing F2 while system post, move cursor to "integrated devices",press enter, set "embedded RAID controller" to "SCSI" mode.  this operation can disable onboard RAID.
    2. I really really do NOT think it is a safe way to recovery your data. after this operation(disable-then enable RAID), you must lose your data even if RAID array status was normal before.
     
    Just personal viewpoint. I am not sure if the firm have some special methods to help you recover data ...
  • kai_kk

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    Posted April 26th, 2006 08:00

    How about these HDs status? online? failed?missing?rebuiding?
     
    You may check these HDs status, if two or more HDs status are failed, this array must be unavailable.
     
    Same way to check HD status:CTRL M => objects => physical drives , then tell me these HDs status. maybe we have another method to restore array.  commonly, the array should work fine with only ONE HD error
     
     
     
     

    Message Edited by kai_kk on 04-26-200604:47 AM

  • mm1582

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    Posted April 26th, 2006 08:00

    Thank you kai_kk

    phew !!   At long last a reply came !!

    I  think you are right. In fact I found out only this morning that  one would DEFINITELY lose the array information and in that sense the date will be lost).  But according to this company, if the disks are removed before any such step is taken, the data on the disk will be preserved.  They reckon that they can recover THAT data PROVIDED that the disks are not connected to raid ?  Not sure really myself but desperation makes one try anything!!

    Best regards!

  • mm1582

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    Posted April 26th, 2006 09:00

    It looks like drives 0 and 2 are OK.  Drive 1 has errors.   They all appear online in CTRL M.  I have included the details in the message here  (not sure whether to repeat them here lest the moderators get angry with that repetition.  

     

    The screen doesn't show any indication of rebuilding, etc.. Please tell me if there is a need for more tests/checks.

    Thanks a lot once again!

     

  • mm1582

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    Posted April 26th, 2006 13:00

    Hello,
    You say
    "
    It looks like that 1# HD have errors(amber/yellow led) but status is online, NOT failed.
    Check physical drive info again, if 1# HD status is online, press enter, then-- force offline.
    "
    I think you meant to say 2# HD   (not 1) ?
     
    And : Make the array state=degraded manually.
    Please advise me: how can I do that manually.  I checked CTRL+M and couldn't find it (missed it?)
     
    Any risk of failing one of the two other drives?
     
    Thanks a million!
  • kai_kk

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    Posted April 26th, 2006 13:00

    Ctrl+m--objects--logical drive--logical drive0--view/update parameters. State=? Optimal or offline or degraded?

    as your description:

    "The LED on slot 2 blinks orange/yellow. The other two are steady green

    And

    Errors:
    Drive 0 and 2  have NO errors, as follows
    Device Error: 0      Other Errors : 0
     
    Drive 1 (the middle drive with blinking orange/yellow LED:

    Device Error: 32      Other Errors : 0"
     
    It looks like that 1# HD have errors(amber/yellow led) but status is online, NOT failed.
     
    Check physical drive info again, if 1# HD status is online, press enter, then-- force offline.
     
    Make the array state=degraded manually. reboot.
     
    50 percent you will see the OS boot screen again, or ,the situation will worse than now.
     
    Do it or NOT?  good luck!
     
     
  • kai_kk

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    Posted April 27th, 2006 00:00

    how can I do that manually
     
    objects-physical drive-press enter on 2# HD--force offline.  this operation will change the array states from optimal to degraded.
  • mm1582

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    Posted April 28th, 2006 15:00

    Well .. thanks but it didnt work. Now the three drives have this blinking LEDs. I think I will try the third party package and see how it goes.

    Thanks anyway for the responses.