Direct attached storage example

Discovery creates configuration items (CI) and CI relationships for dedicated storage servers, in addition to physical and logical storage components attached directly to application and database servers.

In this example of direct attached storage (DAS), a SCSI drive with two partitions, /dev/sda1 and /dev/sda2, is attached to a Linux host. The /dev/sda1 partition is bootable and supports the system software. The /dev/sda2 partition contains a logical volume configured as a storage pool and mounted to the Linux root file system by Logical Volume Management (LVM). The storage pool uses only 1.5GB of the partition, leaving 13GB of storage available for additional logical volumes.
Figure 1. Direct attached storage (DAS) example
Direct attached storage (DAS) example

CIs and relationships created for direct attached storage (DAS)

Configuration item Description Tables Key reference and Relationships
/dev/sda SCSI physical storage device
  • [cmdb_ci_disk]
  • [cmdb_ci_storage_device]
  • [cmdb_rel_ci]
[cmdb_rel_ci]
  • Provides: /dev/sda
  • Provided by:/dev/sda1
[cmdb_rel_ci]
  • Provides: /dev/sda
  • Provided by:/dev/mapper/lvm-root-333-0
/dev/sda1 Partition 1 on the SCSI storage device
  • [cmdb_ci_partition]
  • [cmdb_ci_storage_volume]
  • [cmdb_ci_file_system]
  • [cmdb_rel_ci]
[cmdb_ci_file_system]
  • Mount point: /boot
  • File system: Ext4
[cmdb_rel_ci]
  • Provides: /dev/sda
  • Provided by:/dev/sda1
/dev/sda2 Partition 2 on the SCSI storage device
  • [cmdb_ci_partition]
  • [cmdb_ci_storage_pool_member]
[cmdb_ci_storage_pool_member]
  • Pool: /dev/mapper/lvm-root-333-0
  • Storage: /dev/sda2
/dev/mapper/lvm-root-333-0 Linux logical volume, mapped with LVM to a physical disk storage partition.
  • [cmdb_ci_storage_device]
  • [cmdb_ci_storage_volume]
  • [cmdb_ci_file_system]
  • [cmdb_ci_storage_pool
  • [cmdb_ci_storage_pool_member]
  • [cmdb_ci_lvm_pool]
  • [cmdb_ci_lvm_pool_member][cmdb_rel_ci]
[cmdb_ci_file_system]
  • Mount point: /
  • File system: Ext4
[cmdb_rel_ci]
  • Provides: /dev/sda
  • Provided by:/dev/mapper/lvm-root-333-0
[cmdb_ci_storage_pool_member]
  • Pool: /dev/mapper/lvm-root-333-0
  • Storage: /dev/sda2