This post gives you the solution if you got the errpt error Dump device is too small in AIX.
Error :
LABEL: DMPCHK_TOOSMALL
IDENTIFIER: E87EF1BE
Date/Time: Sat May 29 15:00:00 EDT 2021
Sequence Number: 2452
Machine Id: XXXXXXXXX
Node Id: TEST01
Class: O
Type: PEND
WPAR: Global
Resource Name: dumpcheck
Description
The largest dump device is too small.
Probable Causes
Neither dump device is large enough to accommodate a system dump at this time.
Recommended Actions
Increase the size of one or both dump devices.
Detail Data
Largest dump device
lg_dumplv
Largest dump device size in kb
2621440
Current estimated dump size in kb
3984302
Soluction :
1. Verify the how many dump devices are configured in server using below command.
# sysdumpdev -l
2. Verify the largest dump device using below command(dumpcheck -p) .
# /usr/lib/ras/dumpcheck -p
The largest dump device is too small.
Largest dump device
lg_dumplv
Largest dump device size in kb
2621440
Current estimated dump size in kb
3984302
Above output states that we have to increase the dump logical volume 'lg_dumplv' to estimated dump size in 3984302 KB(3890.9 MB).
3. Verify the rootvg whether we have Free PP's there or not. If we have free PP's to meet the estimated dump size then increase the dump logical volume. As per the step 2, current dump size is 2560 MB and
estimated dump size is 3890.9 MB.
To fix this issue we have increase the dump size 1330.9 MB. If your PP size is 128 MB, you have increase the dump logical volumen by 11 LP (1330.9 / 128 = 10.39) . Execute the below commands.
To verify the Free PP's and PP size.
# lsvg rootvg
4. Extend the dump logical volume by 11 LP's.
# extendlv lg_dumplv 11
5. Execute the dumpcheck command again to check if still it showing the any error. Shown nothing means issue got fixed.
# /usr/lib/ras/dumpcheck -p
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