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  #1  
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Join Date: Oct 2006
Location: Pittsburgh, PA
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Hard reset errors on server


Hello WHT'ers!

On a server that we are running Software RAID 1 with 2x Samsung 840 Pro's in a hot-swappable chassis, we are encountering the following hard reset errors:

[124057.122406] ata1: exception Emask 0x50 SAct 0x0 SErr 0x4090800 action 0xe frozen 12:26
[124057.123117] ata1: irq_stat 0x00400040, connection status changed 12:27
[124057.123480] ata1: SError: { HostInt PHYRdyChg 10B8B DevExch } 12:27
[124057.123548] ata4: exception Emask 0x50 SAct 0x0 SErr 0x4090800 action 0xe frozen 12:27
[124057.123551] ata4: irq_stat 0x00400040, connection status changed 12:27
[124057.123554] ata4: SError: { HostInt PHYRdyChg 10B8B DevExch } 12:27
[124057.123558] ata4: hard resetting link

We'e running CloudLinux Server release 6.5 (Pavel Popovich): 2.6.32-458.23.2.lve1.2.45.el6.x86_64 #1 SMP Fri Nov 22 08:02:49 EST 2013 x86_64 x86_64 x86_64 GNU/Linux

Manufacturer: Supermicro
Product Name: X10SLL-F/X10SLL-SF

Has anyone encountered errors like this? We're thinking it's either due to CloudLinux or potentially a bad backplane.

Thanks!

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  #2  
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This could be bad backplane or bad SATA cable. Can you post the output of smartctl -d ata -a /dev/<your SSD drive>?

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  #3  
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Quote:
Originally Posted by dcdan View Post
This could be bad backplane or bad SATA cable. Can you post the output of smartctl -d ata -a /dev/<your SSD drive>?
Thanks for your reply. Here is the output:

smartctl -d ata -a /dev/sda
smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-458.23.2.lve1.2.45.el6.x86_64] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Device Model: Samsung SSD 840 PRO Series
Serial Number: S1ANNEAD627845P
LU WWN Device Id: 5 002538 5503a8db8
Firmware Version: DXM05B0Q
User Capacity: 128,035,676,160 bytes [128 GB]
Sector Size: 512 bytes logical/physical
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: 8
ATA Standard is: ATA-8-ACS revision 4c
Local Time is: Mon Dec 9 23:54:51 2013 CST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status: (0x00) Offline data collection activity
was never started.
Auto Offline Data Collection: Disabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: ( 0) seconds.
Offline data collection
capabilities: (0x53) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
No Offline surface scan supported.
Self-test supported.
No Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 15) minutes.
SCT capabilities: (0x003d) SCT Status supported.
SCT Error Recovery Control supported.
SCT Feature Control supported.
SCT Data Table supported.

SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
9 Power_On_Hours 0x0032 099 099 000 Old_age Always - 2670
12 Power_Cycle_Count 0x0032 099 099 000 Old_age Always - 2
177 Wear_Leveling_Count 0x0013 099 099 000 Pre-fail Always - 29
179 Used_Rsvd_Blk_Cnt_Tot 0x0013 100 100 010 Pre-fail Always - 0
181 Program_Fail_Cnt_Total 0x0032 100 100 010 Old_age Always - 0
182 Erase_Fail_Count_Total 0x0032 100 100 010 Old_age Always - 0
183 Runtime_Bad_Block 0x0013 100 100 010 Pre-fail Always - 0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
190 Airflow_Temperature_Cel 0x0032 078 066 000 Old_age Always - 22
195 Hardware_ECC_Recovered 0x001a 200 200 000 Old_age Always - 0
199 UDMA_CRC_Error_Count 0x003e 100 100 000 Old_age Always - 0
235 Unknown_Attribute 0x0012 099 099 000 Old_age Always - 1
241 Total_LBAs_Written 0x0032 099 099 000 Old_age Always - 600745563

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]


SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
255 0 65535 Read_scanning was never started
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

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  #4  
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Looks like the drive is in good condition. UDMA_CRC_Error_Count = 0, which means no cable/backplane issues (well, at least for SATA RX/TX signals; this does *not* mean there are no issues with power). I would try upgrading the system's BIOS and kernel. If this does not help, I'd try disabling power saving options.

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  #5  
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Join Date: Oct 2006
Location: Pittsburgh, PA
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Awesome - I'll go ahead and give that a try this weekend during an off peak hour. I'll let you know if it works. Thanks!

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  #6  
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It could just be the drives barfing at the RAID arrangement. The fact you're getting resets on both drives makes me even more suspect. 840P's are notorious for issues such as this in RAID setups, software and hardware... if it were me I'd swap them out with either 830's or another brand altogether.

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  #7  
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Quote:
Originally Posted by FastServ View Post
It could just be the drives barfing at the RAID arrangement. The fact you're getting resets on both drives makes me even more suspect. 840P's are notorious for issues such as this in RAID setups, software and hardware... if it were me I'd swap them out with either 830's or another brand altogether.
I'll upgrade the BIOS and if that doesn't solve the issue, I'll take a look at swapping one of the drives out to see if we continue getting the errors on both. Thanks for your help!

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  #8  
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I believe we have seen this is "aggressive power link management" enabled in bios, disabling it resolved the issue.

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  #9  
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Quote:
Originally Posted by gordonrp View Post
I believe we have seen this is "aggressive power link management" enabled in bios, disabling it resolved the issue.
Thanks I'll try doing that tonight sometime. Appreciate yours and everyone's feedback :-)

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  #10  
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Will second the suggestion about the power link management and checking to see if it's set.

We've run into this issue before ourselves, and just troubleshot an extremely picky and intermittent hardware RAID issue with a customer running Server2008 that turned out to be the PCI Express Link State Power Management setting inside the OS itself. In a nutshell, it would idle out the RAID card, which, as you can imagine, would cause all sorts of issues.

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  #11  
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Also, check on the firmware on the drives. Sometimes, drives fall out of raid on certain models if not updated with the latest firmware.

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  #12  
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We are having the same problem with same motherboard. Just wondering CompuSite did you ever solve this and if so how?

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  #13  
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Hello,

We've ran into this problem when we use those drives (samsung 840 pro) with just about any Intel SATA controller. I have several chassis and chipsets versions and they all fail intermittently under load. Removing and reinserting the drive brings them back for a short time.

So far the only fix I've found is to use a LSI SAS controller. The 9211-8i for example runs solid under load for extended periods of time. I have several LSI SAS versions that are all running well in production.

All of the onboard SATA controllers (other than LSI) I have tested fail at some point under extended heavy load when using those SSD drives. Typical desktop usage doesn't seem to cause any faults, but when we put them in servers and ran them hard for weeks on end they start to pop offline with that error.

Firmware, BIOS, kernels and drivers did not have an impact. I spent weeks on this problem before I found a stable hardware combo. I do not see this problem with Intel enterprise SSD's either, but swapping the controller was much more economical fix.

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  #14  
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Thanks for that....Actually I can update this post with my own findings now.

I'm not using samsung 840 pro drives, but I am using the same motherboard Supermicro X10SLL-F. I have added 2 new drives to this server and created a separate RAID1 array and copied data from another of the RAID1 arrays to this new RAID1 array. It seems now that the errors have stopped or at least they have stopped for the last 12 hours.

This seems to indicate there was a problem with one of our own drives. But I will wait another 24 hours to see if the errors return.

Previously I was certain it was the motherboard, but now it appears to be a hard drive causing the problem. Strange because the hard drive is not reporting any errors, seemingly runs fine, has latest firmware??? I will need to run some tests on this drive on a different system, perhaps there is a problem in the sata port or with that sata link only? Anyway at least I seem to have solved our immediate problem for now.

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Last edited by bjdea1; 06-24-2014 at 08:43 AM.
  #15  
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SSD's tend to have problem with their reliability, so you may be right about the cause.

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