Managing Disks
You can add and remove disks in the MapR-FS from the MapR Control System or using the
diskadd
and diskremove
commands. MapR-FS groups disks
into storage pools, usually made up of two or three disks. When adding disks to
MapR-FS, it is a good idea to add at least two or three at a time so that MapR can create
properly-sized storage pools. Each node in a MapR cluster can support up to 36 storage
pools.
To see which disks are used by MapR-FS, check the disktab
file that MapR
maintains on each node.
For instructions on performing disk maintenance on a node, see Performing Maintenance on a Node. If a disk failure alarm is raised
(NODE_ALARM_DISK_FAILURE
), see Handling Disk
Failures for instructions.