Why would our RAID Drive say its being rebuilt

resolver1
resolver1 used Ask the Experts™
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We have a HP server and we restarted the server after installing software.  Why would it say its rebuilding a drive?  My worry is that we have a underlying problem and i want to know how we can prevent this sort of message occurring.  Your view on the error log below would be appreciated.  Thanks


RIS event log says logical drive OK but here’s the eventview of the drive (taken HP RAID utility) :

Event 1 0-00-00 00:00:00 Logical Drive Surface Analysis Initialization complete. Block count: 00000000. Drive No: 00. Starting Address: 00000000:00000000.
Event 2 0-00-00 00:00:00 Hot Plug Physical Drive Change Removed. Physical drive number: 0x02. Configured drive flag: 1. Spare drive flag: 0. Big drive: 0x00000002. Enclosure Box: 00. Bay: 03
Event 3 0-00-00 00:00:00 Physical Drive Drive State Drive failed. Physical drive number: 0x02. Failure Reason: 0x14. Configured drive flag: 1. Spare drive flag: 0. Big drive: 0x00000002. Enclosure bay: 00. Box: 03
Event 4 0-00-00 00:00:00 Logical Drive Status State change. State change, logical drive 0x0000. Previous logical drive state (0x00): Logical drive OK. New logical drive state (0x03): Logical drive is degraded. Spare status (0x00): No spare configured
Event 5 0-00-00 00:00:00 Logical Drive Status State change. State change, logical drive 0x0000. Previous logical drive state (0x04): Logical drive is ready for recovery operation. New logical drive state (0x05): Logical drive is currently recovering. Spare status (0x00): No spare configured
Event 6 0-00-00 00:00:00 Logical Drive Status State change. State change, logical drive 0x0000. Previous logical drive state (0x05): Logical drive is currently recovering. New logical drive state (0x00): Logical drive OK. Spare status (0x00): No spare configured

Array configuration utility says :

SATA ARRAY A - 1 logical drive:
Array Status OK
Array A
Drive Type SATA

INTERNAL DRIVE
Controller Status OK
Controller Smart Array B110i SATA RAID
Slot 0
Bus Interface PCI
Hardware Revision Unknown
RAID Stack Version 1.36-1
RAID 6 (ADG) Status Disabled
Rebuild Priority Medium
Transformation Priority Medium
Surface Scan Analysis Priority Idle
Surface Scan Delay 15 sec
Number of Ports 4 (Internal only)
Number of Arrays 1
Number of Logical Drives 1
Number of Physical Drives 4

LOGICAL DRIVE :
Logical Drive
Status OK
Drive Number 1
Drive Unique ID 600508B1001FFFFFA006F4E700000000
Size 953816 MB
Fault Tolerance RAID 1+0
Heads 255
Sectors/Track 63
Cylinders 65535
Strip Size 128 KB
Full Stripe Size 256 KB
Array Accelerator Disabled
Disk Name \\.\PhysicalDrive0
Disk Partition Information Partition Number: 1, Size: 100 MB, Mount Point: Unknown
Partition Number: 2, Size: 931.4 GB, Mount Point: C:\
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Event 3 indicates a failed drive. Typically when you build a RAID array you allocate a hot standby drive. When a physical drive fails, the controller will automatically swap in the hot standby, and the array would enter a rebuild status until the new drive has been updated, and becomes a fully functioning member of the array. If you check that status of the array now it should be normal/optimal.

You should have the failed drive replaced, and add the replacement to the hot spare pool.
noxchoIT Product Manager
Top Expert 2009

Commented:
Agreed. It reported the drive as failed and suggested replacing it.

Author

Commented:
Thanks for your quick responce.  We havent swapped any drives before/during/after the error.  All we have performed is a reboot.  Why would the drive rebuild onto the same drive it failed on? Is this something i should be worrying about?

I need to reboot the machine and i dont want it to not restart again saying it has a issue with RAID.
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noxchoIT Product Manager
Top Expert 2009

Commented:
It should not have any issues as RAID reconfigures itself. This is the purpose of RAID - redundancy. Simply replace the failed drive which RAID controller considers to be bad.

Author

Commented:
sorry i don't think I put my point across clearly enough.  The drive which it said failed is the same drive that is in the computer now and it is being reported ok.  Could it be that the disk is about to fail? Should i ask HP to replace it.

Author

Commented:
This a report taken now of the drive that failed:

Physical Drive
Status OK
Drive Configuration Type Data
Size 500.1 GB
Drive Type SATA
Model ATA GB0500EAFYL  
Serial Number WCASYD933171  
Firmware Version HPG2  
PHY Count 1
Transfer Speed 3 Gbps
 Location
Port 3I
Box 1
Bay 3
I suppose it could be an intermittent problem. You should contact HP and provide the error report, then let them advise you if it should be replaced. I would think so.

Is the status still rebuilding? Did you really have a hot standby configured.
IT Product Manager
Top Expert 2009
Commented:
Interesting. Better ask HP why did their controller report this drive failed. If it is going to fail then it would show problems in this latest report as well.

Author

Commented:
Thanks for your quick replys.  Not standby, we have only have 4 drives and have RAID 1+0 so no swap drives.
Ok, in a RAID 1+0 you have two sets of two drives. If you really have a single failed drive, and you were to loose the other in that set, you loose all your data. So you now have a single point of failure.

I would call HP ASAP!

Author

Commented:
Thats what I thought but all drives are reporting OK,weird...I'm on with HP now

Author

Commented:
HP says under warranty they wont replace the HD because the utility is reported as being ok.  The trigger that caused the RAID to rebuild is because the controller lost connection to the hard drive.  They couldn't say if this was a software issue or a hardware issue but when I restarted the server, they recommended shutting it down and unplug the drive and reseat the drive in question (bay 3).

Thanks for your help guys!

Author

Commented:
Thanks again!
noxchoIT Product Manager
Top Expert 2009

Commented:
Thanks for feedback
Take care
Nox

Author

Commented:
just re-read my post - bad english.  I hope you understand it
noxchoIT Product Manager
Top Expert 2009

Commented:
Yes I understood it. Was just thanking for feedback. It Should be useful for others who could meet the same problem.

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