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Block Storage

Attach additional SSD block storage volumes to your instances. Volumes persist independently — they survive instance deletion and can be moved between instances.

Create a Volume

POST /v1/volumes
{
  "name": "data-vol",
  "region": "vh-us-south-1",
  "size_gb": 100,
  "filesystem": "ext4"    // ext4 | xfs | none (raw)
}

Attach to an Instance

POST /v1/volumes/vol_abc123/attach
{ "instance_id": "inst_def456" }

# The volume appears as /dev/vdb inside the instance
# If no filesystem was set at creation, format it:
mkfs.ext4 /dev/vdb
mkdir -p /mnt/data
mount /dev/vdb /mnt/data

# Add to /etc/fstab for persistence across reboots:
echo "/dev/vdb /mnt/data ext4 defaults 0 2" >> /etc/fstab

Resize a Volume

You can increase a volume's size at any time without downtime.

PATCH /v1/volumes/vol_abc123
{ "size_gb": 200 }

# Then resize the filesystem inside the instance:
resize2fs /dev/vdb   # ext4
# or: xfs_growfs /mnt/data   # xfs
⚠️

Volume sizes can only be increased, not decreased. Plan capacity carefully.

Detach & Move

# Unmount inside the instance first
umount /mnt/data

# Then detach via API
POST /v1/volumes/vol_abc123/detach

# Reattach to a different instance
POST /v1/volumes/vol_abc123/attach
{ "instance_id": "inst_new789" }

Pricing

TypePrice
SSD Block Storage$0.10 / GB / month
Volume Snapshots$0.02 / GB / month

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