Preparing file systems on AIX systems

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You must create volume groups, logical volumes, and file systems for the server by using the AIX® Logical Volume Manager.

Procedure

Increase the queue depth and maximum transfer size for all of the available hdiskX disks. Issue the following commands for each disk:
```
chdev -l hdisk4 -a max_transfer=0x100000
chdev -l hdisk4 -a queue_depth=32
chdev -l hdisk4 -a reserve_policy=no_reserve
chdev -l hdisk4 -a algorithm=round_robin
```
Do not run these commands for operating system internal disks, for example, hdisk0.
Create volume groups for the IBM Storage Protect database, active log, archive log, database backup, and storage pool. Issue the mkvg command, specifying the device IDs for corresponding disks that you previously identified.
For example, if the device names hdisk4, hdisk5, and hdisk6 correspond to database disks, include them in the database volume group and so on.
System size: The following commands are based on the medium system configuration. For small and large systems, you must adjust the syntax as required.
```
mkvg -S -y tsmdb hdisk2 hdisk3 hdisk4
mkvg -S -y tsmactlog hdisk5
mkvg -S -y tsmarchlog hdisk6
mkvg -S -y tsmdbback hdisk7 hdisk8 hdisk9 hdisk10
mkvg -S -y tsmstgpool hdisk11 hdisk12 hdisk13 hdisk14 ... hdisk49
```
Determine the physical volume names and the number of free physical partitions to use when you create logical volumes. Issue the lsvg for each volume group that you created in the previous step.
For example:
```
lsvg -p tsmdb
```
The output is similar to the following. The FREE PPs column represents the free physical partitions:
```
tsmdb:
PV_NAME  PV STATE   TOTAL PPs  FREE PPs  FREE DISTRIBUTION
hdisk4   active     1631       1631      327..326..326..326..326
hdisk5   active     1631       1631      327..326..326..326..326
hdisk6   active     1631       1631      327..326..326..326..326
```
Create logical volumes in each volume group by using the mklv command. The volume size, volume group, and device names vary, depending on the size of your system and variations in your disk configuration.
For example, to create the volumes for the IBM Storage Protect database on a medium system, issue the following commands:
```
mklv -y tsmdb00 -t jfs2 -u 1 -x 1631 tsmdb 1631 hdisk2
mklv -y tsmdb01 -t jfs2 -u 1 -x 1631 tsmdb 1631 hdisk3
mklv -y tsmdb02 -t jfs2 -u 1 -x 1631 tsmdb 1631 hdisk4
```

Format file systems in each logical volume by using the crfs command.

For example, to format file systems for the database on a medium system, issue the following commands:

crfs -v jfs2 -d tsmdb00 -p rw -a logname=INLINE -a options=rbrw 
 -a agblksize=4096 -m /tsminst1/TSMdbspace00 -A yes
crfs -v jfs2 -d tsmdb01 -p rw -a logname=INLINE -a options=rbrw 
 -a agblksize=4096 -m /tsminst1/TSMdbspace01 -A yes
crfs -v jfs2 -d tsmdb02 -p rw -a logname=INLINE -a options=rbrw 
 -a agblksize=4096 -m /tsminst1/TSMdbspace02 -A yes

Mount all of the newly created file systems by issuing the following command:
```
mount -a
```
List all file systems by issuing the df command.
Verify that file systems are mounted at the correct LUN and correct mount point. Also, verify the available space.
The following example of command output shows that the amount of used space is typically 1%:
```
tapsrv07> df -g /tsminst1/*
Filesystem      GB blocks  Free     %Used   Iused   %Iused   Mounted on
/dev/tsmact00   195.12     194.59   1%      4       1%       /tsminst1/TSMalog
```
Verify that the user ID you created in Creating the user ID and directories for the server instance has read and write access to the directories for the server.