From a Linux shell on any of the Lightbits servers, enter the lbcli list nvme-devices command to see how many SSDs are managed by the Lightbits node that you want to add SSDs to.
Sample Command
$ lbcli list nvme-devices --node-uuid=fb9c7b76-22f2-4fcf-af1a-70933c1dd3fbA -J flag after lbcli indicates that the JWT is not stored in the lbcli configuration file.
Sample Output
Name Size NUMA ID Serial State Server UUID Node UUID Usagenvme6n1 4T 18446744073709551615 f0c6ae27-2d2c-4a97-b Healthy 1edcc7fb-3acf-5c53-ae1d-3ea3663442f2 d6fdc28a-e721-5bda-bfe9-2f103c75f8b4 Datanvme9n1 4T 18446744073709551615 5dadf1c3-dfe3-402e-a Healthy 1edcc7fb-3acf-5c53-ae1d-3ea3663442f2 d6fdc28a-e721-5bda-bfe9-2f103c75f8b4 Datanvme5n1 400.0 GiB 18446744073709551615 e70f2b94-f0a6-4e7a-8 Healthy 1edcc7fb-3acf-5c53-ae1d-3ea3663442f2 d6fdc28a-e721-5bda-bfe9-2f103c75f8b4 Journalnvme7n1 4T 18446744073709551615 c67ab014-03d9-4956-9 Healthy 1edcc7fb-3acf-5c53-ae1d-3ea3663442f2 --- UnManagednvme0n1 4T 18446744073709551615 fe9989a9-2a63-4ece-9 Healthy 1edcc7fb-3acf-5c53-ae1d-3ea3663442f2 --- UnManagednvme4n1 400.0 GiB 18446744073709551615 efaa0aef-bdbc-4a8e-9 Healthy 1edcc7fb-3acf-5c53-ae1d-3ea3663442f2 d6fdc28a-e721-5bda-bfe9-2f103c75f8b4 Journalnvme3n1 4T 18446744073709551615 bfdb879c-18f0-40f5-b Healthy 1edcc7fb-3acf-5c53-ae1d-3ea3663442f2 d6fdc28a-e721-5bda-bfe9-2f103c75f8b4 Datanvme8n1 4T 18446744073709551615 80183aa9-7468-4bcb-8 Healthy 1edcc7fb-3acf-5c53-ae1d-3ea3663442f2 d6fdc28a-e721-5bda-bfe9-2f103c75f8b4 DataThe output shows that this Lightbits node currently uses four Data NVMe devices and two Journal NVMe devices.
Next, enter the lbcli get node command to check the maximum number of NVMe devices this node was configured to manage, as set by maxDeviceCount in the initial configuration.
Sample Command
$ lbcli get node --uuid=fb9c7b76-22f2-4fcf-af1a-70933c1dd3fb -o jsonA -J flag after lbcli indicates that the JWT is not stored in the lbcli configuration file.
Sample Output
UUID: fb9c7b76-22f2-4fcf-af1a-70933c1dd3fbclusterManagerMode: PassiveModefailureDomains:- rack03-server54hostname: rack03-server54maxNvmeDevices: 12name: server07-0nvmeEndpoint: 10.18.35.15:4420state: Active"journalRaidDevice": { "deviceUUID": "5b05fa61:4a4d4677:8128bda8:4ae8b536", "memberDeviceSerials": [ "e913c069-e466-426d-8", "c56f1d6b-928e-4d2a-9" ]}The output shows that this Lightbits node supports up to 12 Data NVMe SSDs.
Up to eight more SSDs can be added to this node. The lbcli list nvme-devicescommand shows that the node currently uses four Data NVMe drives and the lbcli get node command shows that a maximum of 12 data devices can be used on this node.