- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - Linux
- >
- hpasmcli, Where does it get its info from?
Operating System - Linux
1753685
Members
5498
Online
108799
Solutions
Forums
Categories
Company
Local Language
юдл
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Forums
Discussions
юдл
back
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-29-2009 03:50 AM
тАО01-29-2009 03:50 AM
hpasmcli, Where does it get its info from?
Hi there,
Can someone answer this for me please...
On a DL585 server running RedHat, hpasmcli is showing a dimm as "degraded", if i then move the dimm to another slot, it still shows as degraded, so it looks like there must be a file containing the serial number or the like of the dimm. If i then put this dimm in another server all is fine. So where does "hpasmcli" get it's info from please?
Can someone answer this for me please...
On a DL585 server running RedHat, hpasmcli is showing a dimm as "degraded", if i then move the dimm to another slot, it still shows as degraded, so it looks like there must be a file containing the serial number or the like of the dimm. If i then put this dimm in another server all is fine. So where does "hpasmcli" get it's info from please?
2 REPLIES 2
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-29-2009 11:23 PM
тАО01-29-2009 11:23 PM
Re: hpasmcli, Where does it get its info from?
It's not a "file" as such.
The DL585 uses ECC error correcting memory. The ECC feature on the DIMMs is complemented with memory error counters on the system board. When hpasmcli shows the DIMM as "degraded", it means a non-negligible number of memory errors has been counted on that DIMM since system startup. As the system has not crashed, all of the errors have been corrected in real time by the ECC, but it still indicates the memory is not working quite up to the specifications.
When you move the DIMM in another server, is that server using the same memory bus speed as the DL585? It might be that the DIMM works fine if used at lower speed.
The memory DIMM also has a Serial Presence Detect (SPD) chip - a tiny EEPROM containing the DIMM's serial number, speed rating and other information. The lm_sensors package on Linux has a script "decode-dimms.pl" which you can use on some systems to take a peek at the SPD EEPROMs if you're curious.
It is certainly *possible* that the server might track DIMM serial numbers that have been detected as "degraded", so that the fault indication is displayed consistently even though the DIMM actually produces errors only very rarely. This tracking would probably use the hardware error log (IML), as anything as complex as writing a file to a disk might endanger data integrity if the system has uncorrectable memory errors.
(If the actual instructions that handle the writing would be corrupted by the memory errors, you would get disk corruption on top of the failing memory issue - and you definitely would not be happy.)
A complete and accurate answer would be available only from someone who knows the internals of the DL585 system board, i.e. a HP engineer.
MK
The DL585 uses ECC error correcting memory. The ECC feature on the DIMMs is complemented with memory error counters on the system board. When hpasmcli shows the DIMM as "degraded", it means a non-negligible number of memory errors has been counted on that DIMM since system startup. As the system has not crashed, all of the errors have been corrected in real time by the ECC, but it still indicates the memory is not working quite up to the specifications.
When you move the DIMM in another server, is that server using the same memory bus speed as the DL585? It might be that the DIMM works fine if used at lower speed.
The memory DIMM also has a Serial Presence Detect (SPD) chip - a tiny EEPROM containing the DIMM's serial number, speed rating and other information. The lm_sensors package on Linux has a script "decode-dimms.pl" which you can use on some systems to take a peek at the SPD EEPROMs if you're curious.
It is certainly *possible* that the server might track DIMM serial numbers that have been detected as "degraded", so that the fault indication is displayed consistently even though the DIMM actually produces errors only very rarely. This tracking would probably use the hardware error log (IML), as anything as complex as writing a file to a disk might endanger data integrity if the system has uncorrectable memory errors.
(If the actual instructions that handle the writing would be corrupted by the memory errors, you would get disk corruption on top of the failing memory issue - and you definitely would not be happy.)
A complete and accurate answer would be available only from someone who knows the internals of the DL585 system board, i.e. a HP engineer.
MK
MK
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-30-2009 01:31 AM
тАО01-30-2009 01:31 AM
Re: hpasmcli, Where does it get its info from?
Hi MK,
Thank you for your reply, that has given me a path to look into to see if i can resolve this issue.
Thank you again
Garry
Thank you for your reply, that has given me a path to look into to see if i can resolve this issue.
Thank you again
Garry
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
News and Events
Support
© Copyright 2024 Hewlett Packard Enterprise Development LP