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Friday 25 March 2011

System Dump

System Dump Device is used for Crash Recovery.

By default  /dev/hd6 is assigned for Dump.

Steps to create a dump device:

1) Estimate the amount of size required to create a dump device:

# sysdumpdev -e

The output is shown in bytes.

2) Check the free PP's available in rootvg.

# lsvg rootvg

Determine about PP's required to create dump device.

3) Check the PV's in the rootvg

# lsvg -p rootvg

Select the PV which is having more free PP's to create dump device.

4) Create a dump device.

# mklv -y dump_device -t dump rootvg PP's PV

5) Check the dump device

# lsvg -l rootvg

6) Initialzie the Dump

# sysdumpdev -K

7) Assign the dump device as a primary dump device

# sysdumpdev -Pp /dev/dump_device

8) verify the dump device

# sysdumpdev -l
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