Creating a Persistent Disk

export ZONE= Fill your respective zone

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gcloud compute instances create gcelab --zone $ZONE
gcloud compute disks create mydisk --size=200GB \
--zone $ZONE
gcloud compute instances attach-disk gcelab --disk mydisk --zone $ZONE
gcloud compute ssh gcelab --zone $ZONE

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sudo mkdir /mnt/mydisk
sudo mkfs.ext4 -F -E lazy_itable_init=0,lazy_journal_init=0,discard /dev/disk/by-id/scsi-0Google_PersistentDisk_persistent-disk-1
sudo mount -o discard,defaults /dev/disk/by-id/scsi-0Google_PersistentDisk_persistent-disk-1 /mnt/mydisk