Discussion:
Server memory problems
(too old to reply)
Andy Young
2012-07-16 23:45:51 UTC
Permalink
I am having trouble with one of our servers and I'm not sure what to try
next. It has a Supermicro H8DGi-F motherboard with two 16-core AMD
processors and two memory banks, one for each processor. When I originally
built it, I only had one processor and 40 GB of ram. Everything worked
awesome. I recently upgraded it, adding another processor and another 40 GB
of ram. It was incredibly unstable and constantly rebooted within minute or
two of uptime, sometimes it wouldn't even boot all the way before crashing
and rebooting again. Seemed like a memory issue so I scaled it back to two
processors and 32 GB (4x8GB) of ram. Worked well so I added the remaining 8
GB sticks I had, bringing it up to 64 GB. Still worked great. The sticks I
had left were a mix and match variety of 8GB and 4GB sticks. Thinking maybe
there was some problem with mixing them, I ordered more 8GB memory just
like the ones in the box. While waiting for the new memory, the machine
performed great with no issues. New memory arrived and I added two more 8GB
sticks. Immediately the constant crashing returned. It seems really
unlikely that I got bad memory in two separate orders. Does anyone have any
other ideas? Again, its perfectly stable with two processors and 64 GB of
memory but goes nuts when I more.

I really appreciate the help!!

Motherboard: Supermicro H8DGi-F
CPU: 2 x AMD 6274 (2.2 Ghz 16-core)
Memory: Kingston 8GB DDR3 1333
--
Andrew Young
Mosaic Storage Systems, Inc
http://www.mosaicarchive.com/

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Peter Jeremy
2012-07-17 00:50:02 UTC
Permalink
Post by Andy Young
I am having trouble with one of our servers and I'm not sure what to try
next. It has a Supermicro H8DGi-F motherboard with two 16-core AMD
processors and two memory banks, one for each processor. When I originally
built it, I only had one processor and 40 GB of ram. Everything worked
awesome. I recently upgraded it, adding another processor and another 40 GB
of ram. It was incredibly unstable and constantly rebooted within minute or
two of uptime, sometimes it wouldn't even boot all the way before crashing
and rebooting again.
..
Post by Andy Young
other ideas? Again, its perfectly stable with two processors and 64 GB of
memory but goes nuts when I more.
Have you checked the motherboard notes to ensure that your configuration
is supported? Is the BIOS up to date?

What version of FreeBSD is this? And I presume it's amd64 rather than
i386+PAE.

Have you tried running memtest86 or memtest86+? (You might like to
run both because ISTR only the former handles SMP).

Can you capture the output from a verbose boot with all the memory
installed? The SMAP and/or physical memory layout might offer a
clue as to what is going wrong.
--
Peter Jeremy
Andy Young
2012-07-17 16:51:18 UTC
Permalink
Hi Peter,

I will check the BIOS firmware. I haven't tried that yet.

I'm running FreeBSD 9-RELEASE-p3. Yes it is AMD64.

I ran memtest on the first 32 gb or memory where the machine was initially
stable. Once I put over 64 GB in, I can't get the machine to stay up for
long enough to even try.

I'll try the verbose boot idea too.

Thanks!
Post by Peter Jeremy
Post by Andy Young
I am having trouble with one of our servers and I'm not sure what to try
next. It has a Supermicro H8DGi-F motherboard with two 16-core AMD
processors and two memory banks, one for each processor. When I originally
built it, I only had one processor and 40 GB of ram. Everything worked
awesome. I recently upgraded it, adding another processor and another 40
GB
Post by Andy Young
of ram. It was incredibly unstable and constantly rebooted within minute
or
Post by Andy Young
two of uptime, sometimes it wouldn't even boot all the way before crashing
and rebooting again.
...
Post by Andy Young
other ideas? Again, its perfectly stable with two processors and 64 GB of
memory but goes nuts when I more.
Have you checked the motherboard notes to ensure that your configuration
is supported? Is the BIOS up to date?
What version of FreeBSD is this? And I presume it's amd64 rather than
i386+PAE.
Have you tried running memtest86 or memtest86+? (You might like to
run both because ISTR only the former handles SMP).
Can you capture the output from a verbose boot with all the memory
installed? The SMAP and/or physical memory layout might offer a
clue as to what is going wrong.
--
Peter Jeremy
--
Andrew Young
Mosaic Storage Systems, Inc
http://www.mosaicarchive.com/

Follow us on:
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Michael Fuckner
2012-07-17 16:57:35 UTC
Permalink
Post by Andy Young
Hi Peter,
I will check the BIOS firmware. I haven't tried that yet.
please also check IPMI-Firmware since IPMI controlls memory refresh etc.
Should be 2.50.
Post by Andy Young
I'm running FreeBSD 9-RELEASE-p3. Yes it is AMD64.
I ran memtest on the first 32 gb or memory where the machine was initially
stable. Once I put over 64 GB in, I can't get the machine to stay up for
long enough to even try.
can you tell us about the type of memory you are using- is it Reg Memory?

Regards,
Michael!
Peter Jeremy
2012-07-17 20:09:06 UTC
Permalink
Post by Andy Young
I ran memtest on the first 32 gb or memory where the machine was initially
stable. Once I put over 64 GB in, I can't get the machine to stay up for
long enough to even try.
This pretty well clears FreeBSD then. As others have suggested, I'd
try all the RAM in smaller blocks and talk to Supermicro's technical
support.

It's also possible that your second CPU is bad.
--
Peter Jeremy
Erich Dollansky
2012-07-17 00:58:00 UTC
Permalink
Hi,
Post by Andy Young
I am having trouble with one of our servers and I'm not sure what to try
next. It has a Supermicro H8DGi-F motherboard with two 16-core AMD
processors and two memory banks, one for each processor. When I originally
built it, I only had one processor and 40 GB of ram. Everything worked
awesome. I recently upgraded it, adding another processor and another 40 GB
of ram. It was incredibly unstable and constantly rebooted within minute or
two of uptime, sometimes it wouldn't even boot all the way before crashing
and rebooting again. Seemed like a memory issue so I scaled it back to two
processors and 32 GB (4x8GB) of ram. Worked well so I added the remaining 8
GB sticks I had, bringing it up to 64 GB. Still worked great. The sticks I
had left were a mix and match variety of 8GB and 4GB sticks. Thinking maybe
there was some problem with mixing them, I ordered more 8GB memory just
like the ones in the box. While waiting for the new memory, the machine
performed great with no issues. New memory arrived and I added two more 8GB
sticks. Immediately the constant crashing returned. It seems really
unlikely that I got bad memory in two separate orders. Does anyone have any
other ideas? Again, its perfectly stable with two processors and 64 GB of
memory but goes nuts when I more.
could it be caused by the power supply?

Did you run a memory test?

If possible, try different power supplies.
Post by Andy Young
I really appreciate the help!!
Motherboard: Supermicro H8DGi-F
CPU: 2 x AMD 6274 (2.2 Ghz 16-core)
Memory: Kingston 8GB DDR3 1333
No ECC?

Erich
Andy Young
2012-07-17 17:16:56 UTC
Permalink
Hi Erich,

Why would the power supply be suspect since the machine is perfectly stable
with 64 GB of memory in it?

The server won't stay up long enough to run memtest.

Andy

On Mon, Jul 16, 2012 at 8:59 PM, Erich Dollansky <
Post by Andy Young
Hi,
Post by Andy Young
I am having trouble with one of our servers and I'm not sure what to try
next. It has a Supermicro H8DGi-F motherboard with two 16-core AMD
processors and two memory banks, one for each processor. When I
originally
Post by Andy Young
built it, I only had one processor and 40 GB of ram. Everything worked
awesome. I recently upgraded it, adding another processor and another 40
GB
Post by Andy Young
of ram. It was incredibly unstable and constantly rebooted within minute
or
Post by Andy Young
two of uptime, sometimes it wouldn't even boot all the way before
crashing
Post by Andy Young
and rebooting again. Seemed like a memory issue so I scaled it back to
two
Post by Andy Young
processors and 32 GB (4x8GB) of ram. Worked well so I added the
remaining 8
Post by Andy Young
GB sticks I had, bringing it up to 64 GB. Still worked great. The sticks
I
Post by Andy Young
had left were a mix and match variety of 8GB and 4GB sticks. Thinking
maybe
Post by Andy Young
there was some problem with mixing them, I ordered more 8GB memory just
like the ones in the box. While waiting for the new memory, the machine
performed great with no issues. New memory arrived and I added two more
8GB
Post by Andy Young
sticks. Immediately the constant crashing returned. It seems really
unlikely that I got bad memory in two separate orders. Does anyone have
any
Post by Andy Young
other ideas? Again, its perfectly stable with two processors and 64 GB of
memory but goes nuts when I more.
could it be caused by the power supply?
Did you run a memory test?
If possible, try different power supplies.
Post by Andy Young
I really appreciate the help!!
Motherboard: Supermicro H8DGi-F
CPU: 2 x AMD 6274 (2.2 Ghz 16-core)
Memory: Kingston 8GB DDR3 1333
No ECC?
Erich
--
Andrew Young
Mosaic Storage Systems, Inc
http://www.mosaicarchive.com/

Follow us on:
Twitter <https://twitter.com/#!/MosaicArchive>,
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, Pinterest <http://pinterest.com/mosaicarchive/>
Erich Dollansky
2012-07-18 00:36:05 UTC
Permalink
Hi,
Post by Andy Young
Why would the power supply be suspect since the machine is perfectly stable
with 64 GB of memory in it?
because the machine needs more electricity with the extra modules. If it is at the limits without, it could go behind with the additional modules installed.
Post by Andy Young
The server won't stay up long enough to run memtest.
Also when you boot directly into the memory test?

You did not answer the question regarding ECC.

Did you mix the modules?

Put modules back in reversed order.

Can you insert modules only into the sockets which seem to fail and leave all other empty?

If you can and the machine works then, I assume it is caused by the power supply. If the machine fails then, it is the motherboard.

At least it looks like this from distance as you said that it is most unlikely that the modules are faulty.

Erich
Post by Andy Young
Andy
On Mon, Jul 16, 2012 at 8:59 PM, Erich Dollansky <
Post by Andy Young
Hi,
Post by Andy Young
I am having trouble with one of our servers and I'm not sure what to try
next. It has a Supermicro H8DGi-F motherboard with two 16-core AMD
processors and two memory banks, one for each processor. When I
originally
Post by Andy Young
built it, I only had one processor and 40 GB of ram. Everything worked
awesome. I recently upgraded it, adding another processor and another 40
GB
Post by Andy Young
of ram. It was incredibly unstable and constantly rebooted within minute
or
Post by Andy Young
two of uptime, sometimes it wouldn't even boot all the way before
crashing
Post by Andy Young
and rebooting again. Seemed like a memory issue so I scaled it back to
two
Post by Andy Young
processors and 32 GB (4x8GB) of ram. Worked well so I added the
remaining 8
Post by Andy Young
GB sticks I had, bringing it up to 64 GB. Still worked great. The sticks
I
Post by Andy Young
had left were a mix and match variety of 8GB and 4GB sticks. Thinking
maybe
Post by Andy Young
there was some problem with mixing them, I ordered more 8GB memory just
like the ones in the box. While waiting for the new memory, the machine
performed great with no issues. New memory arrived and I added two more
8GB
Post by Andy Young
sticks. Immediately the constant crashing returned. It seems really
unlikely that I got bad memory in two separate orders. Does anyone have
any
Post by Andy Young
other ideas? Again, its perfectly stable with two processors and 64 GB of
memory but goes nuts when I more.
could it be caused by the power supply?
Did you run a memory test?
If possible, try different power supplies.
Post by Andy Young
I really appreciate the help!!
Motherboard: Supermicro H8DGi-F
CPU: 2 x AMD 6274 (2.2 Ghz 16-core)
Memory: Kingston 8GB DDR3 1333
No ECC?
Erich
--
Andrew Young
Mosaic Storage Systems, Inc
http://www.mosaicarchive.com/
Twitter <https://twitter.com/#!/MosaicArchive>,
Facebook<http://www.facebook.com/MosaicArchive>
, Google Plus<https://plus.google.com/b/102077382489657821832/https://plus.google.com/b/104681960235222388167/104681960235222388167/posts>
, Pinterest <http://pinterest.com/mosaicarchive/>
Andy Young
2012-07-19 15:10:16 UTC
Permalink
Hi Erich,
Post by Erich Dollansky
because the machine needs more electricity with the extra modules. If it
is at the limits without, it could go behind > with the additional modules
installed.

Interesting. The chassis has dual 900W power supplies. Apart from simply
replacing them, I am not sure how I can verify whether the power supply is
the issue.
Post by Erich Dollansky
You did not answer the question regarding ECC.
The memory modules I added are listed on Newegg as Kingston 8 GB 240-Pin
DDRS SDRAM ECC Registered DDR3 1333 Server Memory. So yes they have ECC.
Post by Erich Dollansky
Did you mix the modules?
Yes. There is a mix of modules in there. The original 32 GB of memory that
I put in to begin with are not the exact same module. They are Hynix 8GB
PC3-10600 DDR3-1333MHz ECC Registered CL9 240-Pin DIMM Dual that came from
the hardware integrator we bought the Supermicro chassis from. At this
point there are 32 of the Hynix and 32 of the Kingston and it is working ok
so simply mixing them isn't causing an issue.
Post by Erich Dollansky
Can you insert modules only into the sockets which seem to fail and leave all other empty?
Ok. I can try that.

Thanks for the help!!

Andy

On Tue, Jul 17, 2012 at 7:50 PM, Erich Dollansky <
Post by Erich Dollansky
Hi,
Post by Andy Young
Why would the power supply be suspect since the machine is perfectly
stable
Post by Andy Young
with 64 GB of memory in it?
because the machine needs more electricity with the extra modules. If it
is at the limits without, it could go behind with the additional modules
installed.
Post by Andy Young
The server won't stay up long enough to run memtest.
Also when you boot directly into the memory test?
You did not answer the question regarding ECC.
Did you mix the modules?
Put modules back in reversed order.
Can you insert modules only into the sockets which seem to fail and leave all other empty?
If you can and the machine works then, I assume it is caused by the power
supply. If the machine fails then, it is the motherboard.
At least it looks like this from distance as you said that it is most
unlikely that the modules are faulty.
Erich
Post by Andy Young
Andy
On Mon, Jul 16, 2012 at 8:59 PM, Erich Dollansky <
Post by Andy Young
Hi,
Post by Andy Young
I am having trouble with one of our servers and I'm not sure what to
try
Post by Andy Young
Post by Andy Young
Post by Andy Young
next. It has a Supermicro H8DGi-F motherboard with two 16-core AMD
processors and two memory banks, one for each processor. When I
originally
Post by Andy Young
built it, I only had one processor and 40 GB of ram. Everything
worked
Post by Andy Young
Post by Andy Young
Post by Andy Young
awesome. I recently upgraded it, adding another processor and
another 40
Post by Andy Young
Post by Andy Young
GB
Post by Andy Young
of ram. It was incredibly unstable and constantly rebooted within
minute
Post by Andy Young
Post by Andy Young
or
Post by Andy Young
two of uptime, sometimes it wouldn't even boot all the way before
crashing
Post by Andy Young
and rebooting again. Seemed like a memory issue so I scaled it back
to
Post by Andy Young
Post by Andy Young
two
Post by Andy Young
processors and 32 GB (4x8GB) of ram. Worked well so I added the
remaining 8
Post by Andy Young
GB sticks I had, bringing it up to 64 GB. Still worked great. The
sticks
Post by Andy Young
Post by Andy Young
I
Post by Andy Young
had left were a mix and match variety of 8GB and 4GB sticks. Thinking
maybe
Post by Andy Young
there was some problem with mixing them, I ordered more 8GB memory
just
Post by Andy Young
Post by Andy Young
Post by Andy Young
like the ones in the box. While waiting for the new memory, the
machine
Post by Andy Young
Post by Andy Young
Post by Andy Young
performed great with no issues. New memory arrived and I added two
more
Post by Andy Young
Post by Andy Young
8GB
Post by Andy Young
sticks. Immediately the constant crashing returned. It seems really
unlikely that I got bad memory in two separate orders. Does anyone
have
Post by Andy Young
Post by Andy Young
any
Post by Andy Young
other ideas? Again, its perfectly stable with two processors and 64
GB of
Post by Andy Young
Post by Andy Young
Post by Andy Young
memory but goes nuts when I more.
could it be caused by the power supply?
Did you run a memory test?
If possible, try different power supplies.
Post by Andy Young
I really appreciate the help!!
Motherboard: Supermicro H8DGi-F
CPU: 2 x AMD 6274 (2.2 Ghz 16-core)
Memory: Kingston 8GB DDR3 1333
No ECC?
Erich
--
Andrew Young
Mosaic Storage Systems, Inc
http://www.mosaicarchive.com/
Twitter <https://twitter.com/#!/MosaicArchive>,
Facebook<http://www.facebook.com/MosaicArchive>
, Google Plus<
https://plus.google.com/b/102077382489657821832/https://plus.google.com/b/104681960235222388167/104681960235222388167/posts
Post by Andy Young
, Pinterest <http://pinterest.com/mosaicarchive/>
--
Andrew Young
Mosaic Storage Systems, Inc
http://www.mosaicarchive.com/

Follow us on:
Twitter <https://twitter.com/#!/MosaicArchive>,
Facebook<http://www.facebook.com/MosaicArchive>
, Google Plus<https://plus.google.com/b/102077382489657821832/https://plus.google.com/b/104681960235222388167/104681960235222388167/posts>
, Pinterest <http://pinterest.com/mosaicarchive/>
Erich Dollansky
2012-07-19 15:23:52 UTC
Permalink
Hi,
Post by Andy Young
Post by Erich Dollansky
because the machine needs more electricity with the extra modules. If it
is at the limits without, it could go behind > with the additional modules
installed.
Interesting. The chassis has dual 900W power supplies. Apart from simply
replacing them, I am not sure how I can verify whether the power supply is
the issue.
the next question is if the machine can run with only one. If it is so, then remove one when you have the failing configuration. If it still fails, remove the other one an bring the first one back.
Post by Andy Young
Post by Erich Dollansky
You did not answer the question regarding ECC.
The memory modules I added are listed on Newegg as Kingston 8 GB 240-Pin
DDRS SDRAM ECC Registered DDR3 1333 Server Memory. So yes they have ECC.
Post by Erich Dollansky
Did you mix the modules?
Yes. There is a mix of modules in there. The original 32 GB of memory that
I put in to begin with are not the exact same module. They are Hynix 8GB
PC3-10600 DDR3-1333MHz ECC Registered CL9 240-Pin DIMM Dual that came from
This must work as both are registered and ECC. In addition you should have a BIOS option like 'scrup' the RAM when booting. This takes some time but might shows already the problem.

Erich
Lanny Baron
2012-07-18 02:21:47 UTC
Permalink
Hi Andy,
Sounds to me like you have 1) a flakey board, 2) the memory is not
identical. We never use kingston for a variety of reasons, but you
really should see if the part numbers are identical. The timings on the
drams is critical. I would never mix capacities. 3) Make sure the memory
is all the same i.e. registered e.c.c. or non registered e.c.c.

I don't think its the power supply, but it can be.
Regards,
Lanny
http://www.servaris.com or http://www.freebsdsystems.com
Post by Andy Young
Hi Erich,
Why would the power supply be suspect since the machine is perfectly stable
with 64 GB of memory in it?
The server won't stay up long enough to run memtest.
Andy
On Mon, Jul 16, 2012 at 8:59 PM, Erich Dollansky <
Post by Andy Young
Hi,
Post by Andy Young
I am having trouble with one of our servers and I'm not sure what to try
next. It has a Supermicro H8DGi-F motherboard with two 16-core AMD
processors and two memory banks, one for each processor. When I
originally
Post by Andy Young
built it, I only had one processor and 40 GB of ram. Everything worked
awesome. I recently upgraded it, adding another processor and another 40
GB
Post by Andy Young
of ram. It was incredibly unstable and constantly rebooted within minute
or
Post by Andy Young
two of uptime, sometimes it wouldn't even boot all the way before
crashing
Post by Andy Young
and rebooting again. Seemed like a memory issue so I scaled it back to
two
Post by Andy Young
processors and 32 GB (4x8GB) of ram. Worked well so I added the
remaining 8
Post by Andy Young
GB sticks I had, bringing it up to 64 GB. Still worked great. The sticks
I
Post by Andy Young
had left were a mix and match variety of 8GB and 4GB sticks. Thinking
maybe
Post by Andy Young
there was some problem with mixing them, I ordered more 8GB memory just
like the ones in the box. While waiting for the new memory, the machine
performed great with no issues. New memory arrived and I added two more
8GB
Post by Andy Young
sticks. Immediately the constant crashing returned. It seems really
unlikely that I got bad memory in two separate orders. Does anyone have
any
Post by Andy Young
other ideas? Again, its perfectly stable with two processors and 64 GB of
memory but goes nuts when I more.
could it be caused by the power supply?
Did you run a memory test?
If possible, try different power supplies.
Post by Andy Young
I really appreciate the help!!
Motherboard: Supermicro H8DGi-F
CPU: 2 x AMD 6274 (2.2 Ghz 16-core)
Memory: Kingston 8GB DDR3 1333
No ECC?
Erich
Michael Fuckner
2012-07-17 06:39:16 UTC
Permalink
On 07/17/2012 01:45 AM, Andy Young wrote:
<snip>
Post by Andy Young
Motherboard: Supermicro H8DGi-F
CPU: 2 x AMD 6274 (2.2 Ghz 16-core)
Memory: Kingston 8GB DDR3 1333
Hi all,

if it is a memory problem it will probably logged via ipmi or dmi. Try
ipmitool sel list- or if there are logs in bios.

We typicially use 8 identical modules DDR3- ECC Reg on this board.

Regards,
Michael!
Patrick Proniewski
2012-07-17 07:31:39 UTC
Permalink
Post by Andy Young
New memory arrived and I added two more 8GB
sticks. Immediately the constant crashing returned. It seems really
unlikely that I got bad memory in two separate orders. Does anyone have any
other ideas? Again, its perfectly stable with two processors and 64 GB of
memory but goes nuts when I more.
what about a defective memory slot? Testing another power supply as suggested is a good idea, too.


patpro
Dieter BSD
2012-07-17 18:35:22 UTC
Permalink
It seems really unlikely that I got bad memory in two separate orders.
Test the new memory by itself, keeping at or below the 64 GB
you know works. Then you will know if the board is happy with the
new memory or not.

If the mainboard supported configurations allow, test all slots
while keeping <= 64 GB. If there is a bad slot, visually inspect for
cold solder joints, shorts, etc.

IIRC, FreeBSD has some knob that allows limiting the memory used.
Try having > 64GB of memory plugged in, but limit how much
you actually use.

Some systems are very very picky about memory. Published required
specs for memory might not cover everything. The technical support
folks might have learned more what actually works or not.
Dieter BSD
2012-07-19 19:51:16 UTC
Permalink
Post by Andy Young
Post by Erich Dollansky
because the machine needs more electricity with the extra modules. If it
is at the limits without, it could go behind > with the additional modules
installed.
Interesting. The chassis has dual 900W power supplies. Apart from simply
replacing them, I am not sure how I can verify whether the power supply is
the issue.
As a simple test, you could measure the various Voltages with a DC Voltmeter
and see if they are within spec. Finding problems like noise and ripple
require an oscilloscope.

In theory, you should be able to get specs on the maximum power
required by the mainboard from the various Voltage rails.  Add
the power requirements from any expansion cards, disks, etc.
See if any of the totals exceed the specs of the power supply.
In practice, Tyan would not tell me the power requirements for
my mainboard, just "use one of our recommended power supplies".
Which doesn't tell me how many disks I can add.  And sure enough,
eventually I added enough disks that I started seeing problems
and had to add a second power supply. Perhaps Supermicro will
tell you the power requirements for your mainboard?

If you can find out the power requirements for the memory, you could
add some other load that uses the same or more power from the same
rails instead of the extra memory. If the system runs fine with the
dummy load, then you aren't running out of power.
Post by Andy Young
The memory modules I added are listed on Newegg as Kingston 8 GB 240-Pin
DDRS SDRAM ECC Registered DDR3 1333 Server Memory. So yes they have ECC.
Good. Look through the firmware/bios and see if there are any options
for turning ecc on/off. There might be an option for scrubbing.

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