Replace/Install a new SSD in Server - Revision history

Tannaz at 09:59, 3 September 2024

2024-09-03T09:59:58Z

← Older revision		Revision as of 02:59, 3 September 2024
Line 29:		Line 29:
	Check the Ceph status: `ceph -s`		Check the Ceph status: `ceph -s`

			=== Change the Raid configuration ===

			Most people change the raid config from within the OS, then you don't need downtime. We don't have the configuration utility installed so we generally either use the iDRAC or the boot utility
			We usually need configure the RAID through the iDRAC or the boot utility.

			=== This is what we did before ===
	Before reboting the server in Proxmox, you need to create OSD and check 'ceph pg dump \| grep remapped' to make sure there is no issue (no remapped PG) and we have multiple copies in Scorpion and we can proceed to rebooting the server		Before reboting the server in Proxmox, you need to create OSD and check 'ceph pg dump \| grep remapped' to make sure there is no issue (no remapped PG) and we have multiple copies in Scorpion and we can proceed to rebooting the server
	Reboot the server to put the SSD in Non-Raid (we did it but I am not sure it is a good way)		Reboot the server to put the SSD in Non-Raid (we did it but I am not sure it is a good way)

Tannaz at 16:13, 2 September 2024

2024-09-02T16:13:00Z

← Older revision		Revision as of 09:13, 2 September 2024
Line 21:		Line 21:
	Login in to Proxmox and run `lsblk` to list all the SSDs and verify that SSD is recognized		Login in to Proxmox and run `lsblk` to list all the SSDs and verify that SSD is recognized

	==== Prepare the SSD for Ceph ===		=== Prepare the SSD for Ceph ===
	Install necessary packages		Install necessary packages
	```apt-get update		```apt-get update

Tannaz at 16:12, 2 September 2024

2024-09-02T16:12:48Z

← Older revision		Revision as of 09:12, 2 September 2024
Line 1:		Line 1:
	We use Ceph so RAID is unnecessary for our installment.		We use Ceph so RAID is unnecessary for our installment based on these reasons:
	Ceph provides data replication and redundancy across multiple OSDs (Object Storage Daemons) in the cluster. It automatically replicates data to ensure availability, so RAID's redundancy is redundant.
			* Built-in Redundancy: Ceph provides data replication and redundancy across multiple OSDs (Object Storage Daemons) in the cluster. It automatically replicates data to ensure availability, so RAID's redundancy is redundant.
			*
			* Performance Impact: RAID can introduce additional latency and reduce the performance of SSDs. Ceph is designed to work efficiently with raw disks, and adding RAID can slow down operations.
			*
			* Wasted Resources: Using RAID means you're dedicating some of your disk capacity to redundancy (like RAID 1 mirroring). Ceph already replicates data across multiple disks or nodes, so this would lead to unnecessary resource usage.
			*
			* Complexity: RAID adds another layer of complexity that isn't needed. Managing disks individually with Ceph simplifies management and reduces potential points of failure.
			*

			== How to Install a New SSD ==
			=== Physically Install the SSD ===
			Create a maintenance mode in Zabbix for the server
			Check the slot number of the empty drive bays in iDRAK (or you can check if the SSD is blinking and if it is active or not)
			Assemble the caddy to the SSD
			Pull out the empty drive bay
			Physically Install the SSD

			=== Verify the SSD is Recognized by the System ===
			Login in to Proxmox and run `lsblk` to list all the SSDs and verify that SSD is recognized

			==== Prepare the SSD for Ceph ===
			Install necessary packages
			```apt-get update
			apt-get install ceph ceph-osd```
			Create and Add the OSD: `pveceph createosd /dev/sdX`
			Use command `ceph osd tree` to make sure the new OSD is added
			Check the Ceph status: `ceph -s`

			Before reboting the server in Proxmox, you need to create OSD and check 'ceph pg dump \| grep remapped' to make sure there is no issue (no remapped PG) and we have multiple copies in Scorpion and we can proceed to rebooting the server
			Reboot the server to put the SSD in Non-Raid (we did it but I am not sure it is a good way)
			After rebooting we expect the SSD is detected, we can check in iDRAK manager, if the SSD is blinking
			Go to the lifecycle controller and boot the server, we expect to see the SSD in raid controller
			Check if the SSD shows up in the system diagnostics and make sure the SSD is being recognized by the server
			Make sure ceph is healthy

Tannaz: Created page with "We use Ceph so RAID is unnecessary for our installment. Ceph provides data replication and redundancy across multiple OSDs (Object Storage Daemons) in the cluster. It automatically replicates data to ensure availability, so RAID's redundancy is redundant."

2024-09-02T15:14:30Z

Created page with "We use Ceph so RAID is unnecessary for our installment. Ceph provides data replication and redundancy across multiple OSDs (Object Storage Daemons) in the cluster. It automatically replicates data to ensure availability, so RAID's redundancy is redundant."

New page

We use Ceph so RAID is unnecessary for our installment.
Ceph provides data replication and redundancy across multiple OSDs (Object Storage Daemons) in the cluster. It automatically replicates data to ensure availability, so RAID's redundancy is redundant.