Solved

RAID Array failed, system won't Boot.

Posted on 2007-03-23
4
422 Views
Last Modified: 2010-04-19
First, I know very little about this situation, and I am the most knowledgeable one in our company.  I am the "IT" guy.   My (third party) hardware installers seem to know not a whole lot more, thus the questions.

We have a server with an adaptec scsi RAID system.  Last night there was a power failure and the system failed to boot when restarted this AM.  A call to the (3rd party) network guys brought them out, but we were unable to get the situation resolved.

Presumably we have a 3 array system.

Array 0 has 2 36g drives, RAID 1, mirroring the operating system.
Array 1 has 2 36g drives, RAID 1, mirroring (I think) our GP and SQL server installation
Array 2 has 4 36g drives, RAID 5, holding our DATA.

The adaptec software reports:
Array 0, shows 2 drives, Raid FAILED
Array 1, shows 1 drive, missing member
Array 3, shows 4 drives, optimal

When the system boots, the SCSI controller does its thing, reporting on the RAID, then ultimately the system arrives at:
NO OPERATING SYSTEM found

There are red light error indications on a couple of the drives.  We moved the Array 0 and 1 drives around somewhat to different slots, in the hope that a "slot" was bad.

I would appreciate any help on what NOT to do as well as what TO DO at this point.  Some of my concerns:

1. Would moving the drives "ruin" any data on the drives.
2. Given that the RAID is not working right, can we somehow use the drives to get our systems back?
3. Is it likely that our RAID controller is faulty?  If so, could we replace it and still get our data from the existing drives?






Obviously, our concern is to get back up and running ASAP.




0
Comment
Question by:Volibrawl
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 16

Accepted Solution

by:
AdamRobinson earned 250 total points
ID: 18782950
1) If you moved the drives and it attempted a rebuild on the array, yes, it your data will be completely gone.
2) If you've blasted your data away, no.  
3) It is quite possible.  If you haven't erased the data, you could replace it and it may still work correctly.  You may also just need to get the raid driver on a floppy disk, and it's possible the driver has become corrupted and that's why you're seeing NO DRIVES FOUND.  

I hope you have a good backup.  :(  

I don't know if everyone goes through it, but many of us have encountered this at some point.  Easily the most frustrating circumstance possibly.  Take a deep breath.  :)

0
 
LVL 43

Assisted Solution

by:Davis McCarn
Davis McCarn earned 250 total points
ID: 18784997
1) What will break the arrays is if you change the SCSI ID's of their members, so be careful.
2) If there is an option in the Adaptec utilities to backup the raid configuration, DO IT NOW!
3) the second array has a failed drive which needs to be replaced.  Make the new one match the SCSI id of the bad one and it ought to rebuild itself; but, be patient, it will take hours.
4) The partition table, boot record, or MFT on the first array is damaged. Partition Table Doctor ( http://www.ptdd.com/ ) should probably be able to fix it.

I would back up the raid info to diskette, remove the good 3rd array and failed 2nd, use the Adaptec utility to check the 1st arrays drives, fix the partition table/boot record problem on the first array and see it boot in SAFE MODE, add back the good drive and the replacement letting that array rebuild, then add back the 3rd array.
0
 
LVL 9

Author Comment

by:Volibrawl
ID: 18792200
Thanks, I am guessing that we (as you put it) blasted our data away on the first Array (operating system).  In our zeal to get the thing to boot, I think we "switched" the position of the drives in the bay.  I don't think we ever changed any IDs, however.  We did get an I/O disk error message a time or two, and several red light indicators on the drives in the bay.

We ordered a replacement (identical) RAID controller card.  When it arrives, we will see if anything can be salvaged.

In the meantime, I am looking for a failsafe system to protect / preserve our operating system and server configuration.  I am posting another question re: is the RAID 1 system the best alternative?





0
 
LVL 9

Author Comment

by:Volibrawl
ID: 18792208
ps  .. in what TA did you 'find' this question.  If I have other RAID / backup questions, I want to know the best area to post.
0

Featured Post

Forrester Webinar: xMatters Delivers 261% ROI

Guest speaker Dean Davison, Forrester Principal Consultant, explains how a Fortune 500 communication company using xMatters found these results: Achieved a 261% ROI, Experienced $753,280 in net present value benefits over 3 years and Reduced MTTR by 91% for tier 1 incidents.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
HP Server The device, \Device\Harddisk1\DR5, has a bad block. 5 110
Anything wrong with Window server backup? 8 144
Server adapter cards 3 57
how to upgrade m600 to esxi 6? 4 42
By default, Carbonite Server Backup manages your encryption key for you using Advanced Encryption Standard (AES) 128-bit encryption. If you choose to manage your private encryption key, your backups will be encrypted using AES 256-bit encryption.
In this article we will learn how to backup a VMware farm using Nakivo Backup & Replication. In this tutorial we will install the software on a Windows 2012 R2 Server.
This tutorial will walk an individual through configuring a drive on a Windows Server 2008 to perform shadow copies in order to quickly recover deleted files and folders. Click on Start and then select Computer to view the available drives on the se…
This tutorial will walk an individual through the process of configuring basic necessities in order to use the 2010 version of Data Protection Manager. These include storage, agents, and protection jobs. Launch Data Protection Manager from the deskt…

751 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question