AIX SYSTEM DUMP DEVICE

VIEWING  DUMP DEVICE

# sysdumpdev -l
primary /dev/hd6
secondary /dev/sysdumpnull
copy directory /var/adm/ras
forced copy flag TRUE
always allow dump FALSE
dump compression ON

CREATING SECONDARY DUMP DEVICE:

# mklv -t jfs2 rootvg 2
lg_dumplv
# sysdumpdev -s /dev/lg_dumplv
primary /dev/hd6
secondary /dev/lg_dumplv
copy directory /var/adm/ras
forced copy flag TRUE
always allow dump FALSE
dump compression ON

SCANNING DUMP DEVICE:

# sysdumpdev -L -S /dev/hd6
0453-019 No previous dumps recorded.
Scanning device /dev/hd6 for existing dump.
A valid dump was not detected in the dump devices.
Scanning device /dev/lg_dumplv for existing dump.
A valid dump was not detected in the dump devices.

ESTIMATING DUMP SIZE:

# sysdumpdev -e
0453-041 Estimated dump size in bytes: 138621747

EXTENDING DUMP DEVICE:

# extendlv lg_dumplv 1
# sysdumpdev -l
primary /dev/hd6
secondary /dev/fslv03
copy directory /var/adm/ras
forced copy flag TRUE
always allow dump FALSE
dump compression ON

To reset Primary Dump dev null:

# sysdumpdev -p /dev/sysdumpnull -P

To reset Secondary Dump dev null

# sysdumpdev -s /dev/sysdumpnull -P

Verify the Dump LV Details:

Error : The largest dump device is too small
/usr/lib/ras/dumpcheck -p
The largest dump device is too small.
Largest dump device
 lg_dumplv
Largest dump device size in kb
 262144
Current estimated dump size in kb
 577331

Solution :

# extendlv lg_dumplv 2 <br># /usr/lib/ras/dumpcheck -p<br>

Check dump device size

# lsps -s<br>

Verify dumplv details

# sysdumpdev -L

Verify dump device estimated size

# sysdumpdev -L
Verify dump device estimated size 
sysdumpdev -e
Estimated dump size in bytes: 309539635 KB = 295MB 
Solution : 
extendlv lg_dumplv 6 or 
Increase the Paging Space size 
lsps -a
chps -s 1 paging00 upto needed size

 

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