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9 Replies Latest reply: Feb 4, 2012 7:24 AM by JMeurisse

Poor performance on RAID-10 AFTER disk rebuild on IRST

JMeurisse Dec 29, 2011 8:12 AM

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Hi all,

I have been using a RAID-10 array since a couple of months and it worked nicely (Read speed was about 168MB/s) until recently.

When I switched on the computer, the array status was REBUILDING. It took about 24 hours to get it done and got back the "NORMAL" status. However, despite the fact all seems to be OK from the Intel monitoring dashboard, the array performances are now dramatically poor (average READ speed of the array is 1.6MB/s) and it is practically unusable although all my data are available.

1) How can I troubleshoot the cause of the issue since all seems to be OK from the Intel monitoring dashboard? Are there any logs somewhere?

2) Do you think this is a hardware or software issue?

3) Is it possible to "break" the RAID to test the speed of my disks individually, but without lossing my data?

Thanks a lot in advance for your help!

-------------------------------------

Here below my configuration :

Mother Board: Asus P8P67

System Report

System Information

OS name: Microsoft Windows 7 Édition Intégrale

OS version: 6.1.7601 Service Pack 1 7601

System name: MAMGOUDIG

System manufacturer: System manufacturer

System model: System Product Name

Processor: GenuineIntel Intel64 Family 6 Model 42 Stepping 7 3,301 GHz

BIOS: American Megatrends Inc., 1704

Intel® Rapid Storage Technology

Kit installed: 10.6.0.1002

User interface version: 10.6.0.1002

Language: English (United States)

Intel RAID controller: Intel(R) Desktop/Workstation/Server Express Chipset SATA RAID Controller

Number of SATA ports: 5

RAID option ROM version: 10.5.0.1034

Driver version: 10.6.0.1002

ISDI version: 10.6.0.1002

Device Information

Name: Array_0000

Size: 2.3 TB

Available space: 0 GB

Disk data cache: Enabled

Number of volumes: 1

Volume member: Secure

Number of disks: 4

Array disk: WD-WCATR0445882

Array disk: WD-WCATR0447039

Array disk: WD-WCASYA737770

Array disk: WD-WCASYA791155

Name: Secure

Status: Normal

Type: RAID 10

Size: 1.2 TB

Data stripe size: 64 KB

Write-back cache: Enabled

System volume: No

Initialized: Yes

Verification errors found: 0

Blocks with media errors: 0

Physical sector size: 512 Bytes

Logical sector size: 512 Bytes

Parent array: Array_0000

Number of disks: 4

Array disk: WD-WCATR0445882

Array disk: WD-WCATR0447039

Array disk: WD-WCASYA737770

Array disk: WD-WCASYA791155

Disk on port 0

Port location: Internal

Status: Normal

Type: Hard disk

Usage: Available

Size: 298 GB

Serial number: S0MQJDWQ100907

Model: SAMSUNG HD321KJ

Firmware: CP100-12

System disk: Yes

Password protected: No

Disk data cache: Enabled

Native command queuing: Yes

SATA transfer rate: 1.5 Gb/s

Physical sector size: 512 Bytes

Logical sector size: 512 Bytes

Disk on port 2

Port location: Internal

Status: Normal

Type: Hard disk

Usage: Array disk

Size: 596 GB

Serial number: WD-WCATR0445882

Model: WDC WD6400AAKS-00E4A0

Firmware: 05.01D05

System disk: No

Password protected: No

Disk data cache: Enabled

Native command queuing: Yes

SATA transfer rate: 3 Gb/s

Physical sector size: 512 Bytes

Logical sector size: 512 Bytes

Disk on port 3

Port location: Internal

Status: Normal

Type: Hard disk

Usage: Array disk

Size: 596 GB

Serial number: WD-WCATR0447039

Model: WDC WD6400AAKS-00E4A0

Firmware: 05.01D05

System disk: No

Password protected: No

Disk data cache: Enabled

Native command queuing: Yes

SATA transfer rate: 3 Gb/s

Physical sector size: 512 Bytes

Logical sector size: 512 Bytes

Disk on port 4

Port location: Internal

Status: Normal

Type: Hard disk

Usage: Array disk

Size: 596 GB

Serial number: WD-WCASYA737770

Model: WDC WD6400AAKS-22A7B2

Firmware: 01.03B01

System disk: No

Password protected: No

Disk data cache: Enabled

Native command queuing: Yes

SATA transfer rate: 3 Gb/s

Physical sector size: 512 Bytes

Logical sector size: 512 Bytes

Disk on port 5

Port location: Internal

Status: Normal

Type: Hard disk

Usage: Array disk

Size: 596 GB

Serial number: WD-WCASYA791155

Model: WDC WD6400AAKS-22A7B2

Firmware: 01.03B01

System disk: No

Password protected: No

Disk data cache: Enabled

Native command queuing: Yes

SATA transfer rate: 3 Gb/s

Physical sector size: 512 Bytes

Logical sector size: 512 Bytes

1. Re: Poor performance on RAID-10 AFTER disk rebuild on IRST

allan_intel Dec 30, 2011 2:53 PM (in response to JMeurisse)

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Hi there!

If you reset disk to Non-Raid, the information on a RAID 10 volume will not be accessible. You can break a mirror configuration without losing information but it does not happen on RAID 10

The fact that read speed decreased, it could be considered as hardware issue.

When you have Intel® Rapid Storage installed on the computer, the only log available is the system report generated within rapid storage software.

Thanks

Allan
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2. Re: Poor performance on RAID-10 AFTER disk rebuild on IRST

JMeurisse Dec 30, 2011 3:10 PM (in response to allan_intel)

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Hi Allan

Thanks for your post back!

I understand my data won't be accessible if I set the disks to "non RAID", but will they be accessible back again once I will set them back to "RAID10"?
My idea would be to unpair the disks, test them individually, identify the faulty unit, reconfigure the RAID10 back again (and get back access to my data), and then replace the faulty unit through the standard procedure.

Would this work, or what else would you suggest to identify the faulty disk, so that I can replace it?

Thanks,

JMeurisse.
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3. Re: Poor performance on RAID-10 AFTER disk rebuild on IRST

JMeurisse Jan 7, 2012 11:54 AM (in response to JMeurisse)

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Hi Allan,

Any feedback to my problem?

Thanks a lot in advance and have a nice day!

JMeurisse
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4. Re: Poor performance on RAID-10 AFTER disk rebuild on IRST

JMeurisse Jan 14, 2012 4:38 AM (in response to JMeurisse)

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Hi all, any help on this topic please?

Really I'm stuck in the middle of nowhere, and any help would be much appreciated!

JMeurisse
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5. Re: Poor performance on RAID-10 AFTER disk rebuild on IRST

r3z0nate Jan 15, 2012 3:38 PM (in response to JMeurisse)

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I would be careful and backup anything that might be important if possible. I had 4 WD Raptors in a RAID 1 on my older ASUS A8N-SLI board and didn't have any problems for years. Then I upgraded to a ASUS P6T-SE with the Intel ICH10R, setup two arrays - a RAID 0 for the OS only and a RAID 10 for all the files I thought I would never loose.

After replacing a drive, rebuilding both arrays, I had accidently booted with a cable disconnected on another drive and have lost absolutely everything.
All of the recovery software that I've tried will only locate the RAID 0 array which is pointless because those files are corrupt anyway.

I can't say you won't loose any data, but you shouldn't as I've taken drives out and looked at them and gone from RAID to Sata on my board
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6. Re: Poor performance on RAID-10 AFTER disk rebuild on IRST

JMeurisse Jan 16, 2012 2:19 PM (in response to r3z0nate)

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Thanks a lot for your help r3zOnate. Definitely I need to buy a new disk to backup my data before any further trials...
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7. Re: Poor performance on RAID-10 AFTER disk rebuild on IRST

r3z0nate Jan 31, 2012 11:52 AM (in response to JMeurisse)

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No problem. Let me know if you have any success in recovering your data.

I'm close to risking this myself.
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8. Re: Poor performance on RAID-10 AFTER disk rebuild on IRST

JMeurisse Feb 4, 2012 7:23 AM (in response to JMeurisse)
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Hi there

I have finally fixed my issue. Here is the way I did, so that other people in my case can benefit from my learnings

Disabled RAID in the BIOS and started Windows
Windows now sees 4 hard drives. The OS proposes you to format them in order to be usable; of course dont do that and ignore this proposal.
Ran HD Tune and identified the faulty disk (1,2MB/s !!! ).

Shut down the PC, unplugged (both power and sata) the faulty disk, reactivate the RAID mode in the BIOS
Rebooted. RAID10 volume was up and running, with a "DEGRADED" status... of course!
Made the RMA to Western Digital and waited to receive my new disk.
Installed the new disk, plugged Power and SATA.
Booted Windows. New unit is not considered as a RAID member : you need to go to the Intel Rapid Storage software, select the RAID10 volume and click "Rebuild on new volume". You choose the new Hard drive.
It took about 140 min to reconstruct the RAID10 of 4 * 640Gb.
The RAID10 volume is now up, healty, and running!
See HD Tune result of the RAID10 volume:

Hope this helps!
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9. Re: Poor performance on RAID-10 AFTER disk rebuild on IRST

JMeurisse Feb 4, 2012 7:24 AM (in response to JMeurisse)

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Solved the issue by myself, but shared the receipee with others
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