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48 restless hours!

RAID is not a backup solution, it is proved again! I was planning to write my experience of 48 hours from July 22 7:17 to July 24 7:23 GMT -5, couldn’t really manage to get some time. All the users who...

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How much data does Mellowhost have in their Backup?

It should be pretty known if you are a Mellowhost customer that we backup our servers on daily basis. We are currently using R1Soft CDP for each of our servers. All the backup servers are offsite, that...

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Backing up LVM Cache Volume?

I have been trying to explore what options do we have to use SSD Cache with a HDD driven servers to create faster writes. There are both software and hardware solutions. Hardware solution comes to...

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How to: Find IOPS usage in a Linux Server

Question: How to find iops usage of a linux server? Answer: Use iostat. Iostat is a tool comes with the ‘sysstat’ package. If you type iostat on your CentOS/Redhat server and it says the command not...

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How to: Setup a server for R1Soft CDP backup?

We at Mellowhost has been utilizing R1Soft CDP backup for last 8 years. R1Soft has been a great backup tool even though the tool is immensely resource hoggy. At different times we had gone through...

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How To Get Disk Serial Number in Megaraid

Question: We can use smartctl to get the disk serial ID in case of disk replacement or crashes, with the following: smartctl -a /dev/sdX Where X is the device identifier like, for the first disk, this...

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Server Boots to Grub – OVH Servers – How to Fix

Error Details After you have completed updating your yum, you saw the kernel got updated, and hence restarted the server to take the new kernel. But you find out that the server has never come online....

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How to Speed Up Software RAID (mdadm) Resync Speed

mdadm is the software raid tools used in Linux system. One key problem with the software raid, is that it resync is utterly slow comparing with the existing drive speed (SSD or NVMe). The resync speed...

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How to Find Drive Error in RAID Behind LSI RAID Card

Question: How can I see if the drives behind the hardware raid card using LSI has any reported error or not? Solution First, to find out if your drive raid arrays are optimal or not, you may run the...

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How to create Software RAID 1 on Fresh NVMe Drives in CentOS/RHEL

Let’s say, you just installed two NVMe drives. That means, you currently have the following devices on your system: /dev/nvme0n1 /dev/nvme0n2 Now, to use Raid 1 on these devices, you need to first...

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