Asset ID:	1-71-1005348.1
Update Date:	2011-05-11
Keywords:

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Solution Type  Technical Instruction Sure

Solution  1005348.1 :   StorageTek[TM] 5000 NAS OS series Core Dump setup  


PreviouslyPublishedAs
207458

Description
StorageTek[TM] NAS 5000 series Core Dump setup. Operating system version 4.21 required.


Steps to Follow
Operating system version 4.21 adds the capability to create a "core dump". This procedure should only be performed on the specific advice of Technical Support. A core dump is useful only for certain issues, usually panic or hang related.
A core dump provides a snapshot of the contents of physical memory when a system crash occurs. This crash can be a system panic, or could be generated with the Non-Maskable Interrupt (NMI) button during a hang condition. The Non-Maskable Interrupt (NMI) switch sends an NMI order to the CPU, which is used by Field Service for debugging activities. This information is used to analyze the software state on the server to help determine what cased the crash. Core dumps are saved to a raw disk partition and then must be saved to a file on the next system reboot to leave the dump device available for a subsequent core dump.

The following procedure configures the NAS server to capture a core dump and save it to a directory on the backend storage.

Create a raw disk partition bigger than the physical memory size.

From the telnet menu, access "D", disks and volumes.
Find a device with at least 6G of space on the list.
Select the corresponding letter.
Select "1", Edit
Use the arrow keys to scroll to the desired free space.
Select "1", Create.
Select "3", Raw.
Enter "6000" for size.
Select "7", Proceed with create.

Enter the following at the NAS CLI:

set kern.dumpdir /volume/path
savevars

Replace /volume/path with the path to an existing directory to store the core files.

If the system panics or an NMI is generated, the core dump will be saved to the configured partition.

After the system reboots, the core file will saved to the configured directory, with the filename vmcore.x.gz, incrementing x for each new core file saved. These are the files that should be sent to Technical Support.

Notes:

- It is possible to create a larger or smaller raw partition, but 6G is sufficient to capture any existing memory configuration.

- It is possible to create only one raw partition per system

- This procedure needs to be done for each head in the case of a cluster system.

- Do not attempt to use /cvol or /dvol flash storage to save the core files.

- This functionality is only available in OS version 4.21 or later.

Product
Sun StorageTek 5320 NAS Gateway/Cluster System
Sun StorageTek 5320 NAS Appliance
Sun StorageTek 5310 NAS Gateway/Cluster System
Sun StorageTek 5310 NAS Gateway System
Sun StorageTek 5310 NAS Appliance
Sun StorageTek 5220 NAS Appliance
Sun StorageTek 5210 NAS Appliance

NAS, core dump
Previously Published As
89129

Change History
Date: 2007-04-26
User Name: 31620
Action: Approved
Comment: Verified Metadata - ok
Verified Keywords - ok
Verified still correct for audience - currently set to contract
Audience left at contract as per FvF at
http://kmo.central/howto/content/voyager-contributor-standards.html
Checked review date - currently set to 2008-04-23
Checked for TM - adjusted for STK 5000 NAS OS
Publishing under the current publication rules of 18 Apr 2005:
Version: 3

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