Adding addtional disk to the existing disk group (Virtual Box)

1. Check the existing 
ls /dev/sd* 

brw-rw---- 1 root disk 8,  2 Apr 12 12:15 sda2
brw-rw---- 1 root disk 8, 32 Apr 12 12:15 sdc
brw-rw---- 1 root disk 8, 48 Apr 12 12:15 sdd
brw-rw---- 1 root disk 8,  1 Apr 12 12:15 sda1
brw-rw---- 1 root disk 8,  0 Apr 12 12:16 sda
brw-rw---- 1 root disk 8, 16 Apr 12 12:16 sdb
brw-rw---- 1 root disk 8, 64 Apr 12 12:16 sde
 

2. Shutdown the machine

3. create a new storage disk (new fixed size )

4. modify as shareable

5. Confirm that the new /dev/sd* has been attached sucessfully to the server

6. fdisk /dev/sdf -- follow the normal procedure as "n" "p" "1" return retun "w" cross reffer the commands and confirm the new disk is showing in /dev/sd*

7./sbin/scsi_id -g -u -d /dev/sdf (sdf is the newly added disk)

8.Configure udev vi /etc/udev/rules.d/99-oracle-asmdevices.rules


9. restart the machine it should have added now !!

Now Discover the asm disks from asm instance, so that it can be added to an existing disk group

column name format a30
column value format a20
SELECT group_number, name, value
FROM v$asm_attribute
ORDER BY group_number, name;
GROUP_NUMBER NAME  
SQL>   2    3

GROUP_NUMBER NAME                           VALUE
------------ ------------------------------ --------------------
           1 au_size                        1048576
           1 content.check                  FALSE
           1 content.type                   data
           1 disk_repair_time               3.6h
           1 failgroup_repair_time          24.0h
           1 idp.boundary                   auto
           1 idp.type                       dynamic
           1 phys_meta_replicated           true
           1 sector_size                    512
           1 thin_provisioned               FALSE

10 rows selected.
---------------------------------------------------------------------------------------

column path format a20
set lines 132
set pages 50
select path, group_number group_#, disk_number disk_#, mount_status,
header_status, state, total_mb, free_mb
from v$asm_disk
order by group_number;SQL> SQL> SQL>   2    3    4

PATH                    GROUP_#     DISK_# MOUNT_S HEADER_STATU STATE      TOTAL_MB    FREE_MB
-------------------- ---------- ---------- ------- ------------ -------- ---------- ----------
/dev/asm-disk5                0          0 CLOSED  CANDIDATE    NORMAL            0          0
/dev/asm-disk4                1          3 CACHED  MEMBER       NORMAL         5114       2447
/dev/asm-disk1                1          0 CACHED  MEMBER       NORMAL         5114       2402
/dev/asm-disk3                1          2 CACHED  MEMBER       NORMAL         5114       2407
/dev/asm-disk2                1          1 CACHED  MEMBER       NORMAL         5114       2410

--------------------------------------------------------------------------------------------------

login to asm instance and add the new added disk to the existing disk group

alter diskgroup data add disk '/dev/asm-disk5';

And the new disk added sucessfully and visible as disk5 in the disk group.


column path format a20
set lines 132
set pages 50
select path, group_number group_#, disk_number disk_#, mount_status,
header_status, state, total_mb, free_mb
from v$asm_disk
order by group_numberSQL> SQL> SQL>   2    3    4
  5  /

PATH                    GROUP_#     DISK_# MOUNT_S HEADER_STATU STATE      TOTAL_MB    FREE_MB
-------------------- ---------- ---------- ------- ------------ -------- ---------- ----------
/dev/asm-disk3                1          2 CACHED  MEMBER       NORMAL         5114       2737
/dev/asm-disk5                1          4 CACHED  MEMBER       NORMAL        12284      10942
/dev/asm-disk1                1          0 CACHED  MEMBER       NORMAL         5114       2735
/dev/asm-disk2                1          1 CACHED  MEMBER       NORMAL         5114       2742
/dev/asm-disk4                1          3 CACHED  MEMBER       NORMAL         5114       2771


The below query can give us the detailed look on the asm disks/diskgroup etc....

REM ASM views: REM VIEW            |ASM INSTANCE                                     |DB INSTANCE REM ---------------------------------------------------------------------------------------------------------- REM V$ASM_DISKGROUP |Describes a disk group (number, name, size       |Contains one row for every open ASM REM                 |related info, state, and redundancy type)        |disk in the DB instance. REM V$ASM_CLIENT    |Identifies databases using disk groups           |Contains no rows. REM                 |managed by the ASM instance.                     | REM V$ASM_DISK      |Contains one row for every disk discovered       |Contains rows only for disks in the REM                 |by the ASM instance, including disks that        |disk groups in use by that DB instance. REM                 |are not part of any disk group.                  | REM V$ASM_FILE      |Contains one row for every ASM file in every     |Contains rows only for files that are REM                 |disk group mounted by the ASM instance.          |currently open in the DB instance. REM V$ASM_TEMPLATE  |Contains one row for every template present in   |Contains no rows. REM                 |every disk group mounted by the ASM instance.    | REM V$ASM_ALIAS     |Contains one row for every alias present in      |Contains no rows. REM                 |every disk group mounted by the ASM instance.    | REM v$ASM_OPERATION |Contains one row for every active ASM long       |Contains no rows. REM                 |running operation executing in the ASM instance. | set wrap off set lines 155 pages 9999 col "Group Name" for a6    Head "Group|Name" col "Disk Name"  for a10 col "State"      for a10 col "Type"       for a10   Head "Diskgroup|Redundancy" col "Total GB"   for 9,990 Head "Total|GB" col "Free GB"    for 9,990 Head "Free|GB" col "Imbalance"  for 99.9  Head "Percent|Imbalance" col "Variance"   for 99.9  Head "Percent|Disk Size|Variance" col "MinFree"    for 99.9  Head "Minimum|Percent|Free" col "MaxFree"    for 99.9  Head "Maximum|Percent|Free" col "DiskCnt"    for 9999  Head "Disk|Count" prompt prompt ASM Disk Groups prompt =============== SELECT g.group_number  "Group" ,      g.name          "Group Name" ,      g.state         "State" ,      g.type          "Type" ,      g.total_mb/1024 "Total GB" ,      g.free_mb/1024  "Free GB" ,      100*(max((d.total_mb-d.free_mb)/d.total_mb)-min((d.total_mb-d.free_mb)/d.total_mb))/max((d.total_mb-d.free_mb)/d.total_mb) "Imbalance" ,      100*(max(d.total_mb)-min(d.total_mb))/max(d.total_mb) "Variance" ,      100*(min(d.free_mb/d.total_mb)) "MinFree" ,      100*(max(d.free_mb/d.total_mb)) "MaxFree" ,      count(*)        "DiskCnt" FROM v$asm_disk d, v$asm_diskgroup g WHERE d.group_number = g.group_number and d.group_number <> 0 and d.state = 'NORMAL' and d.mount_status = 'CACHED' GROUP BY g.group_number, g.name, g.state, g.type, g.total_mb, g.free_mb ORDER BY 1; prompt ASM Disks In Use prompt ================ col "Group"          for 999 col "Disk"           for 999 col "Header"         for a9 col "Mode"           for a8 col "State"          for a8 col "Created"        for a10          Head "Added To|Diskgroup" --col "Redundancy"     for a10 --col "Failure Group"  for a10  Head "Failure|Group" col "Path"           for a19 --col "ReadTime"       for 999999990    Head "Read Time|seconds" --col "WriteTime"      for 999999990    Head "Write Time|seconds" --col "BytesRead"      for 999990.00    Head "GigaBytes|Read" --col "BytesWrite"     for 999990.00    Head "GigaBytes|Written" col "SecsPerRead"    for 9.000        Head "Seconds|PerRead" col "SecsPerWrite"   for 9.000        Head "Seconds|PerWrite" select group_number  "Group" ,      disk_number   "Disk" ,      header_status "Header" ,      mode_status   "Mode" ,      state         "State" ,      create_date   "Created" --,      redundancy    "Redundancy" ,      total_mb/1024 "Total GB" ,      free_mb/1024  "Free GB" ,      name          "Disk Name" --,      failgroup     "Failure Group" ,      path          "Path" --,      read_time     "ReadTime" --,      write_time    "WriteTime" --,      bytes_read/1073741824    "BytesRead" --,      bytes_written/1073741824 "BytesWrite" ,      read_time/reads "SecsPerRead" ,      write_time/writes "SecsPerWrite" from   v$asm_disk_stat where header_status not in ('FORMER','CANDIDATE') order by group_number ,        disk_number / Prompt File Types in Diskgroups Prompt ======================== col "File Type"      for a16 col "Block Size"     for a5    Head "Block|Size" col "Gb"             for 9990.00 col "Files"          for 99990 break on "Group Name" skip 1 nodup select g.name                                   "Group Name" ,      f.TYPE                                   "File Type" ,      f.BLOCK_SIZE/1024||'k'                   "Block Size" ,      f.STRIPED ,        count(*)                               "Files" ,      round(sum(f.BYTES)/(1024*1024*1024),2)   "Gb" from   v$asm_file f,v$asm_diskgroup g where  f.group_number=g.group_number group by g.name,f.TYPE,f.BLOCK_SIZE,f.STRIPED order by 1,2; clear break prompt Instances currently accessing these diskgroups prompt ============================================== col "Instance" form a8 select c.group_number  "Group" ,      g.name          "Group Name" ,      c.instance_name "Instance" from   v$asm_client c ,      v$asm_diskgroup g where  g.group_number=c.group_number / prompt Free ASM disks and their paths prompt ============================== col "Disk Size"    form a9 select header_status                   "Header" , mode_status                     "Mode" , path                            "Path" , lpad(round(os_mb/1024),7)||'Gb' "Disk Size" from   v$asm_disk where header_status in ('FORMER','CANDIDATE') order by path / prompt Current ASM disk operations prompt =========================== select * from   v$asm_operation /