1、查看errpt报错信息：
# errpt
IDENTIFIER TIMESTAMP T C RESOURCE_NAME DESCRIPTION
E87EF1BE 0412150015 P O dumpcheck The largest dump device is too small.查看详细信息：
# errpt -aj E87EF1BE
---------------------------------------------------------------------------
LABEL: DMPCHK_TOOSMALL
IDENTIFIER: E87EF1BE
Date/Time: Sun Apr 12 15:00:01 CST 2015
Sequence Number: 147
Machine Id: 00F8E7B74C00
Node Id: yamngdb1
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
5242880
Current estimated dump size in kb
52727802、评估需要扩容得大小
上面errpt，最后4行信息给出了dump分区的当前大小和推荐大小。
# 查看当前dump主分区
# sysdumpdev -l
primary /dev/lg_dumplv
secondary /dev/sysdumpnull
copy directory /var/adm/ras
forced copy flag TRUE
always allow dump FALSE
dump compression ON
type of dump traditional也可以使用：
sysdumpdev -e查看估计值。
查看当前逻辑分区lg_dumplv的大小：
# lslv lg_dumplv
LOGICAL VOLUME: lg_dumplv VOLUME GROUP: rootvg
LV IDENTIFIER: 00f7d3f800004c000000013b45cf5d14.11 PERMISSION: read/write
VG STATE: active/complete LV STATE: opened/syncd
TYPE: sysdump WRITE VERIFY: off
MAX LPs: 512 PP SIZE: 512 megabyte(s)
COPIES: 1 SCHED POLICY: parallel
LPs: 18 PPs: 10
STALE PPs: 0 BB POLICY: relocatable
INTER-POLICY: minimum RELOCATABLE: yes
INTRA-POLICY: middle UPPER BOUND: 32
MOUNT POINT: N/A LABEL: None
MIRROR WRITE CONSISTENCY: on/ACTIVE
EACH LP COPY ON A SEPARATE PV ?: yes
Serialize IO ?: NO 当前大小为(PP SIZE)*(PPs)：
512*10*1024*1024= 5368709120 需要扩容大小为：
5399537254 - 5368709120 = 30828134即：
30828134/1024/1024=29M3、查看rootvg剩余PPs
VOLUME GROUP: rootvg VG IDENTIFIER: 00f8e7b700004c0000000145aa472f5f
VG STATE: active PP SIZE: 512 megabyte(s)
VG PERMISSION: read/write TOTAL PPs: 1116 (571392 megabytes)
MAX LVs: 256 FREE PPs: 498 (254976 megabytes)
LVs: 14 USED PPs: 618 (316416 megabytes)
OPEN LVs: 13 QUORUM: 1 (Disabled)
TOTAL PVs: 2 VG DESCRIPTORS: 3
STALE PVs: 0 STALE PPs: 0
ACTIVE PVs: 2 AUTO ON: no
MAX PPs per VG: 32512
MAX PPs per PV: 1016 MAX PVs: 32
LTG size (Dynamic): 1024 kilobyte(s) AUTO SYNC: no
HOT SPARE: no BB POLICY: relocatable
PV RESTRICTION: none INFINITE RETRY: no
DISK BLOCK SIZE: 512 剩余498 PP，每个PP 512M，扩容1个即可。
4、扩容lg_dumplv:
extendlv lg_dumplv 11表示扩1个PP
5、检查扩容效果：
# lslv lg_dumplv
LOGICAL VOLUME: lg_dumplv VOLUME GROUP: rootvg
LV IDENTIFIER: 00f8e7b700004c0000000145aa472f5f.11 PERMISSION: read/write
VG STATE: active/complete LV STATE: opened/syncd
TYPE: sysdump WRITE VERIFY: off
MAX LPs: 512 PP SIZE: 512 megabyte(s)
COPIES: 1 SCHED POLICY: parallel
LPs: 11 PPs: 11
STALE PPs: 0 BB POLICY: relocatable
INTER-POLICY: minimum RELOCATABLE: yes
INTRA-POLICY: middle UPPER BOUND: 32
MOUNT POINT: N/A LABEL: None
MIRROR WRITE CONSISTENCY: on/ACTIVE
EACH LP COPY ON A SEPARATE PV ?: yes
Serialize IO ?: NO
INFINITE RETRY: no PPs已变成11。
手动运行一次dumpcheck：
/usr/lib/ras/dumpcheck使用errpt命令，查看是否有最新的报错产生，如果没有，则问题解决。
可使用：
errclear 0清空errpt信息。