#Aws scsi disk map to xvd how to#
#Aws scsi disk map to xvd driver#
#Aws scsi disk map to xvd software#
#Aws scsi disk map to xvd professional#

Create mount point, and run the following commands: mkdir /mnt/disk1.Format disk as xfs, and run the following commands: mkfs.xfs /dev/xvdb.

Run the following command to confirm that you have three disks: $ lsblk.

Run the following instructions as the user root. Mount the device using UUID instead of the device name.

On Step 4, add two new volumes, device /dev/sdb 10 GiB and device /dev/sdc 12 GiB.įigure 2: Launch instances, add storage Create filesystem and mountĬonnect to your instance using EC2 Instance Connect or any other method that feels comfortable for you.

On Step 1, choose Amazon Linux 2 AMI (HVM), SSD Volume Type.

Use Launch Instance Wizard with the following details.

Create the filesystem on the volumes and mount themįor this walkthrough, you should have the following prerequisites:Ĭreate one instance with three volumes: a root volume and two data volumes.

The new instance type volumes will have another name format. Later, you will change the instance type. In this instance type, volumes have a specific name format. You will create one instance with three volumes: one root volume and two data volumes. Using UUID to mount volumes lets you mitigate future issues when you stop and start your instance or change the instance type.įigure 1: EC2 instance block device mapping Walkthrough This situation can be more evident when using applications that require more volumes. It doesn’t mean that the Linux device has the same name or can be discovered in the same order as specified on the instance mapping. When you create an instance, you specify block devices mapping.

#Aws scsi disk map to xvd how to#

This post shows how to mount Linux volumes and keep mount points preserved when the instance type is changed or the instance is rebooted. This is the case if you configure the fstab file with the device name and change the instance type.

#Aws scsi disk map to xvd software#

All GNU/Linux filesystems (including swap and LUKS headers of raw encrypted devices) support UUID.Īs UUID is a filesystem attribute, it can also be used with Logical Volume Manager (LVM) and Linux software RAID (mdadm).ĭepending on the fstab file configuration, you may find that you can’t access your instance, which requires you to follow a rescue process to fix issues.

These identifiers’ attributes are generated by filesystem utilities (mkfs.*) when the device is formatted, and they’re designed so that collisions are unlikely. UUID is a mechanism for giving each filesystem a unique identifier. Therefore, they shouldn’t be used in configuration files. Kernel name descriptors aren’t persistent and can change each boot.

On Linux, you can use the fstab file to mount devices using kernel name descriptors (the traditional way), file system labels, or the file system UUID. In this situation, a device that should be mounted on /data could end-up being mounted on /logs.

#Aws scsi disk map to xvd driver#

The block device driver can assign NVMe device names in a different order than what you specified for the volumes in the block device mapping. In this case, it will fail to mount.Īmazon EBS volumes are exposed as NVMe block devices on instances built on the AWS Nitro System. If you mount a device on T2 called /dev/sdc, when you change the instance family to T3 the same device won’t be called /dev/sdc anymore. T2 uses /dev/sd, while T3 uses /dev/nvmen1. The device name can be different between instance families, such as T2 and T3. The customer wants to avoid the situation where a volume is mounted on a different mount point just because the device name changed, or the device name doesn’t exist because the name pattern changed.Ĭustomers who want to utilize the latest instance family usually change the instance type when a new one is available. As the device name can change, the customer shouldn’t rely on the device name to mount volumes from it. In this case, device name can vary depending on some facts, such as virtualization type, instance type, or operating system.

#Aws scsi disk map to xvd professional#

This post is written by: Leonardo Azize Martins, Cloud Infrastructure Architect, Professional ServicesĬustomers often use Amazon Elastic Compute Cloud (Amazon EC2) Linux based instances with many Amazon Elastic Block Store (Amazon EBS) volumes attached.