AWS EBS Volume Management Guide, adding and modifying volume

Creating and Attaching New EBS Volume

1. Create EBS volume in AWS Console:

   • Select desired size, volume type, and availability zone

   • Note: AZ must match EC2 instance

2. Attach volume to EC2 instance:

   • Select volume in AWS Console

   • Click "Actions" > "Attach Volume"

   • Choose target EC2 instance

   • Note device name (e.g., /dev/sdb)

3. Verify disk attachment:

lsblk
ls /dev/

4. Check filesystem:

sudo file -s /dev/sdb

5. Create filesystem (if output shows "data"):

sudo mkfs -t ext4 /dev/sdb

6. Verify filesystem:

sudo file -s /dev/sdb

7. Mount volume:

sudo mkdir /test
sudo mount /dev/sdb /test
df -h

Expanding Existing EBS Volume

1. Modify volume size in AWS Console:

   • Select volume

   • "Actions" > "Modify Volume"

   • Enter new size

2. Verify new size on instance:

lsblk

3. Resize partition using parted:

sudo parted /dev/sdb
(parted) resizepart
Partition number? 1
Warning: Partition is being used. Continue? yes
End? 100%
quit

4. Check filesystem:

sudo file -s /dev/sdb

5. Unmount volume:

sudo umount /dev/sdb

6. Check filesystem integrity:

sudo e2fsck -f /dev/sdb

7. Resize filesystem:

sudo resize2fs /dev/sdb

8. Remount volume:

sudo mount /dev/sdb /test
df -h

Best Practices

• Always backup data before resizing

• Verify size changes using both lsblk and df -h

• Run e2fsck before resize2fs

• Use consistent mount points