In order to reduce
the risk of
errors, the platform divides the file system over several disks keeping areas
liable to grow outside the main root file system. The areas with the highest
growth such as logs and database storage are kept on their own private file
These disk mounts
can be migrated onto new, larger disks and some other locations can optionally
be moved onto their own disks. This is managed through the
mounted file systems and mount points can be displayed using
A screen showing
drives list mounted and drives list mountpoints:
platform@development:~$ drives list mountpoints
platform@development:~$ drives list mounted
sdd1 - mongodb:dbroot
sdc1 - core_services:backups
The mount points
are as follows:
mongodb:dbroot is the volume used for database storage
core_services:backups is used for default backup storage
core_services:appdata is the main system volume used for
application data in the users account
core_services:SWAPSPACE is the swap volume used by the
In order to add or
extend an existing disk volume, follow the following steps:
add an additional disk volume to the VM
list displays any unused available volumes
A free mountpoint can be linked to a new disk using
used mountpoint (i.e., currently linked to a disk volume) can be linked to a
new disk volume of greater size using
reassign <disk> <mountpoint>. Existing data on the current disk
will be copied to the new disk volume, and once successful, the new disk volume
will be linked.
For example, the
following steps can be followed to add a 250GB hard disk to the system:
Log into the
VMware console and select Server.
and select Edit settings.
and select Hard Disk.
the rest of the wizard and edit parameters - in this case 250GB, thick
Once done, log
into the system as the platform user.
disk listing with the command
disks with the command
reassign <new disk name> mongodb:dbroot.
SAN alignment is
implemented using the offset value in
offset. This value can be changed if necessary; however, the default should
be sufficient for most SAN hardware.
For swap partitions, use drives checkswap to check their alignment. Use drives alignswap to fix a misaligned swap partition.