#vxprint -g datadg -htdatavol
V  NAME        RVG/VSET/CO  KSTATE   STATE    LENGTH   READPOL  PREFPLEX UTYPE
PL NAME        VOLUME       KSTATE   STATE    LENGTH  LAYOUT    NCOL/WID MODE
SD NAME        PLEX         DISK     DISKOFFS LENGTH  [COL/]OFF DEVICE   MODE
SV NAME        PLEX         VOLNAME  NVOLLAYR LENGTH   [COL/]OFFAM/NM    MODE
SC NAME        PLEX         CACHE    DISKOFFS LENGTH  [COL/]OFF DEVICE   MODE
DC NAME        PARENTVOL    LOGVOL
SP NAME        SNAPVOL      DCO
EX NAME        ASSOC        VC                      PERMS    MODE     STATE
SRNAME        KSTATE

v  datavol      -            ENABLED  ACTIVE  2097152  SELECT    datavol-01 fsgen
pldatavol-01   datavol      ENABLED  ACTIVE  2097152  STRIPE    2/128    RW
sddatadg02-04  datavol-01   datadg020        1048576  0/0      hds9500-alua0_002a ENA 
sd datadg01-03  datavol-01   datadg010        1048576  1/0      hds9500-alua0_0026 ENA

#df -k |grep/vol1
/dev/vx/dsk/datadg/datavol
                   1048576   17749  966401    2%    /vol1

vxresize would fail with the following error:

#vxresize -g datadg -bx datavol +1g

#UX:vxfs fsadm: ERROR:V-3-20305: cannot open /vol1/lost+found/.fsadm - errno 30
VxVM vxresize ERROR V-5-1-7514 Problem running fsadm command for volume datavol, in diskgroup datadg

"errno 30" means the file system is read-only.

#cd/usr/include/sys
#grep 30 errno.h
#define EROFS  30      /* Read only filesystem                */


Trying to touch a file would fail with "cannot create" which confirms the file system is mounted as read-only.

The solution is to run vxresize after remounting the file system as read-write.

#mount -F vxfs -o remount,rw/dev/vx/dsk/datadg/datavol /vol1
#vxresize -bx datavol +1g

Verify the file system size is increased.

#df -k |grep/vol1
/dev/vx/dsk/datadg/datavol 2097152   180061949207     1%    /vol1