Azure Classroomnotes 13/Apr/2023

Azure Managed Disks contd

Performance Aspects

• IOPS: Number of read/write operations that can be performed on the disk
• Throughput: Amount of data per second that can be read/write on the disk
• Throughput = IOPS * Block_size
• Disk types Refer Here
• Any virtual machine which supports premium disks will have s in it (B1s and B1)

Unmanaged disk

• This is not recommended as each storage account can have a max of 40 disks and max performance is 20000 IOPS
• Refer Here for comparisions
• To create unmanaged disks navigate to Advanced section
  
• We need a storage account

Attaching and detaching disks

• While creating vm1 add and additional data disk
  
  
• Create a vm2 with no additional data disks
  
• Detach data disk from vm1
  
• Now attach data disk to vm2
  
• Commands used to attach disks

# in bash
diskId=$(az disk show -g myResourceGroup -n myDataDisk --query 'id' -o tsv)

# in powershell

$diskId =az disk show -g myResourceGroup -n myDataDisk --query 'id' -o tsv

az vm disk attach -g myResourceGroup --vm-name myVM --name $diskId

• Explore shared disk
  

Exercise

• What is SMB?
• What are NAS (Network Attached Storage) and SAN (Storage Area Networks)
• When to use them?