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AIX list offset logical volume created with mklv -TO -t raw

3.Find the number of partitions per disk in the volume group

3.3.Find the number of partitions per disk in the volume group
# lsvg -p cert_asmvg1
cert_asmvg1:
PV_NAME PV STATE TOTAL PPs FREE PPs FREE DISTRIBUTION
hdisk17 active 7 7 02..01..01..01..02
hdisk18 active 7 7 02..01..01..01..02

4.Create a single zero-byte offset logical volume for each physical volume using up all space on that physical volume. The suggested naming standard is <db_name>_asmdisk<seq>
# mklv -TO -t raw -U oracle -G dba -P 600 -y cert_asmdisk1 cert_asmvg1 7 hdisk17
cert_asmdisk1
# mklv -TO -t raw -U oracle -G dba -P 600 -y cert_asmdisk2 cert_asmvg1 7 hdisk18
cert_asmdisk2

===how can I list the offset logical volume I have just created cert_asmdisk2

it-rex

ASKER

to be more clear I have setps 3,4
and my Question is

How can I list the offset logical volume I have just created cert_asmdisk2?

ASKER CERTIFIED SOLUTION

woolmilkporc

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woolmilkporc

Content?

The first ten 80-byte blocks:

dd if=/dev/rcert_asmdisk2 bs=80 count=10

In char and hex:

dd if=/dev/rcert_asmdisk2 bs=80 count=10 | od -tcx

it-rex

ASKER

under /dev

brw------- 1 oracle dba 37, 1 Sep 29 14:25 cert_pidisk1
brw------- 1 oracle dba 37, 2 Sep 29 14:25 cert_pidisk2
crw-rw---- 1 root system 37, 0 Sep 29 13:20 cert_pivg1
crw------- 1 oracle dba 37, 1 Sep 29 14:25 rcert_pidisk1
crw------- 1 oracle dba 37, 2 Sep 29 14:25 rcert_pidisk2

the commands used to create

cert_pidisk1
cert_pidisk2

are

mklv -TO -t raw -U oracle -G dba -P 600 -y cert_pidisk1 cert_pivg1 1199 hdisk4
mklv -TO -t raw -U oracle -G dba -P 600 -y cert_pidisk2 cert_pivg1 199 hdisk5

I do not see in the docs how

rcert_pidisk1
rcert_pidisk2

were created

if I do
lslv cert_pidisk1

I get

LOGICAL VOLUME: cert_pidisk1 VOLUME GROUP: cert_pivg1
LV IDENTIFIER: 00c1c87500004c0000000132b6334d48.1 PERMISSION: read/write
VG STATE: active/complete LV STATE: closed/syncd
TYPE: raw WRITE VERIFY: off
MAX LPs: 1199 PP SIZE: 256 megabyte(s)
COPIES: 1 SCHED POLICY: parallel
LPs: 1199 PPs: 1199
STALE PPs: 0 BB POLICY: relocatable
INTER-POLICY: minimum RELOCATABLE: yes
INTRA-POLICY: middle UPPER BOUND: 1024
MOUNT POINT: N/A LABEL: None
MIRROR WRITE CONSISTENCY: on/ACTIVE
EACH LP COPY ON A SEPARATE PV ?: yes
Serialize IO ?: NO
DEVICESUBTYPE : DS_LVZ
COPY 1 MIRROR POOL: None
COPY 2 MIRROR POOL: None
COPY 3 MIRROR POOL: None

but when I do

$ lslv rcert_pidisk1
0516-306 lslv: Unable to find rcert_pidisk1 in the Device
Configuration Database.

what I am missing and what is the difference between both?

woolmilkporc

cert_pidisk1

is the name of the logical volume you created and also the name of the associated block device special file (driver).

rcert_pidisk1

is the name of the automatically generated "character" ("raw") device special file (driver) for that LV.

Please see the letters "c" ("character" = "raw") and "b" ("block") in the first column of the "ls -l /dev/..." output.

See also the major and minor numbers of the devices (37 / 1 for (r)cert_pidisk1, 37 / 2 for (r)cert_pidisk2).

They're identical for "cert..." and "rcert..." so you can see that it's the same device and just a different driver.

wmp

it-rex

ASKER

you are athe best!