the largest dump device is too small error

[pctech321]

hai all,

for past 7 days daily I got the this error everyday..

Date/Time: XXXXXXXXXXXXXX
Sequence Number: XXXXXXX
Machine Id: XXXXXX
Node Id: XXXXXX
Class: O
Type: pend
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.
in that AIX box I have just one vol group roovg and in that I have one hdisk0

VOLUME GROUP: rootvg VG IDENTIFIER: XXXXXXX
VG STATE: active PP SIZE: 64 megabyte(s)
VG PERMISSION: read/write TOTAL PPs: 288 (18432 megabytes)
MAX LVs: 256 FREE PPs: 46 (2944 megabytes)
LVs: 17 USED PPs: 242 (15488 megabytes)

#sysdumpdev –l
primary /dev/dumplv
secondary /dev/sysdumpnull
copy directory /var/adm/ras
forced copy flag TRUE
always allow dump TRUE
dump compression OFF.

So which file system size do I need to check and whats the optical dumpdev size ???
Pls any suggestions..

Thank you.

 

[khalidaaa]

I think you need to increase your dump device size!

Try sysdumpdev -e and it will give you how much dump you need for your machine!

Regards,
Khalid

 

[Gloups]

/usr/lib/ras/dumpcheck -p

to see your dump device. You'll see something like:

The largest dump device is too small.

Largest dump device
hd6
Largest dump device size in kb
524288
Current estimated dump size in kb
688947
There is not enough free space in the file system containing the copy directory to accommodate the dump.

File system name
/var/adm/ras
Current free space in kb
135060
Current estimated dump size in kb
688947



In this cas i need to expand hd6

using:

extendlv hd6 XX where XX is the number of logical partitions to add

 

[pctech321]

pacific12/root: / > sysdumpdev -l

primary /dev/dumplv
secondary /dev/sysdumpnull
copy directory /var/adm/ras
forced copy flag TRUE
always allow dump TRUE
dump compression OFF

pacific12/root: /usr/lib/ras > dumpcheck -p

The largest dump device is too small.

Largest dump device
dumplv
Largest dump device size in kb
524288
Current estimated dump size in kb
735232

pacific12/root: /var/adm/ras > lsvg rootvg (portion of output stripped)

PP SIZE: 64 megabyte(s)
TOTAL PPs: 288 (18432 megabytes)
FREE PPs: 46 (2944 megabytes)
USED PPs: 242 (15488 megabytes)

And about /var

/dev/hd9var 0.12 0.05 64% 1237 4% /var

so all I need to do is ?
extendlv hd9var logicalpartitions (?????)

size of each logicalparitions is 512 bytes right ???...above I given all info about statistics can
u pls suggest me the exact command for extendlv ..

thank you,

 

[p5wizard]

Well, the system is telling you 2 things.

1) your dump device /dev/dumplv is too small.
2) your /var filesystem is too small to hold a copy of the dump (on rebooting, the system tries to copy that dump away from the dump device before activating it and letting the system create another dump image to it)

so:

1) [tt]extendlv dumplv 8[/tt]
(minimal extend size in your case is 4, but I like to keep some reserve size)

2) [tt]chfs -asize=1G /var[/tt]
the chfs will do the underlying extendlv for hd9var for you, before changing the FS's size.

But you may want to check first if the free space you have (about 3GB) is just on one disk, or is it 1.45 GB on each of two mirrored disks?

show
[tt]lsvg -p rootvg
lsvg -l rootvg[/tt]
please.


HTH,

p5wizard

 

[pctech321]

here are the details

Pacific12/root: /usr/lib/ras > lsvg -p rootvg
rootvg:
PV_NAME PV STATE TOTAL PPs FREE PPs FREE DISTRIBUTION
hdisk0 active 288 46 01..12..00..00..33

pacific12/root: /usr/lib/ras > lsvg -l rootvg
rootvg:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
h boot 1 1 1 closed/syncd N/A
hd6 paging 16 16 1 open/syncd N/A
paging01 paging 16 16 1 open/syncd N/A
paging00 paging 16 16 1 open/syncd N/A
hd8 jfslog 1 1 1 open/syncd N/A
hd4 jfs 1 1 1 open/syncd /
hd2 jfs 39 39 1 open/syncd /usr
hd9var jfs 2 2 1 open/syncd /var
hd3 jfs 9 9 1 open/syncd /tmp
hd1 jfs 1 1 1 open/syncd /home
hd10opt jfs 4 4 1 open/syncd /opt
dumplv sysdump 8 8 1 open/syncd N/A
lv00 jfs 47 47 1 open/syncd /db2
lv01 jfs 32 32 1 open/syncd /ps_jas
lv02 jfs 47 47 1 open/syncd /websphere
loglv00 jfslog 1 1 1 open/syncd N/A
lv04 jfs 1 1 1 open/syncd /var/adm/perfmgr


thank you,

 

[p5wizard]

OK, go ahead on what I posted earlier:

[tt]extendlv dumplv 8
chfs -asize=1G /var[/tt]



HTH,

p5wizard