Creating a Volume
Before creating a volume, initialize disks
and assign them to disk groups.
·
Striped: Minimum two disks
·
Mirrored: Minimum one disk for each plex
·
RAID-5: Minimum three disks plus one disk
to contain the log
# vxmake –g
<diskgroup> vol <volname>
plex=<plexname>
Instead
of creating sub-disks, plexes, volumes step-by-step we can create volume at a
time by vxassist command.
# vxassist –g
<diskgroup> make volname size layout
Syntax:
#vxassist –g
<dg_name> make <vol_name> <size> <disk_media_name>
rd17ux4dev#
vxassist -g testdg make testvol 200M disk01
rd17ux4dev#
vxprint -th testvol
Disk group: testdg
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/]OFF AM/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
SR NAME
KSTATE
v testvol - ENABLED ACTIVE
409600 SELECT -
fsgen
pl testvol-01
testvol ENABLED ACTIVE
409600 CONCAT -
RW
sd disk01-01
testvol-01 disk01 0
409600 0 TagmaStore-USP0_1 ENA
Block and character (raw) device files are set up that you can
use to access the volume:
- Block device file for the volume:
/dev/vx/dsk/diskgroup/volume_name
- Character device file for the volume:
/dev/vx/rdsk/diskgroup/volume_name
To
display volume attributes, use:
# vxassist –g
diskgroup help showattrs
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