Features & limits

Documentation Index

Fetch the complete documentation index at: https://docs.rafftechnologies.com/llms.txt

Use this file to discover all available pages before exploring further.

_{Updated May 8, 2026}

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Features

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Capacity and resize

• Single performance class — every volume is NVMe SSD; no tiers to choose from today
• 10 - 1000 GiB size range at create time
• Online resize (grow) — increase capacity any time while attached; OS-side filesystem extension required to see the new space
• One-way only — volumes can grow but not shrink

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Driver and device naming

• virtio-blk block driver inside every guest
• Device paths: /dev/vda (OS disk), /dev/vdb, /dev/vdc, … (attached volumes in attach order)
• No /dev/sd* or /dev/nvme* paths — those don’t exist on Raff

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Filesystems

• Auto-format at create time (Linux only) — pick ext4 (default) or xfs
• Manual format — supported on both Linux and Windows; you run mkfs (Linux) or initialize via Disk Management (Windows)
• Windows — auto-format is not supported; format and mount via Disk Management as NTFS

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Attach model

• Single-attach — one VM at a time
• Region-locked — volumes only attach to VMs in the same region they were created in
• Project-scoped — volume inherits the project of the attached VM
• Active or passive VM required — attach and detach work in either state; not while the VM is provisioning
• No live multi-attach — for shared access, use Object Storage

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Lifecycle independence

• Survives VM stop / start / reboot / resize — always
• Survives VM reinstall and factory reset — attached, contents intact
• Survives VM destroy — automatically detached but not deleted; keeps billing until you delete it
• Volume snapshots survive volume delete — see Storage model

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Encryption

• Encryption at rest — enabled by default at the platform level; not configurable per volume

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Bandwidth

• VM ↔ volume traffic is free and unmetered — included regardless of plan

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Capacity limits

For volumes near the upper end, xfs scales better than ext4 on parallel-I/O workloads — see Volume types.

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Filesystem support

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Pricing

Same dual-mode model as VMs: subscription by default, PAYG available on request.

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Subscription (default)

The per-GiB rate is the same on every term — there’s no term discount on volumes today (unlike VM plans, which have term discounts). Charges accrue continuously and settle month-end on the 1st against your account balance, with any remainder charged to your saved card. Resize-up adds prorated cost; delete or downsize credits unused time back to your balance.

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Pay-as-you-go (enterprise / SMB on request)

PAYG is available for enterprise and SMB customers — contact support to enable it on your account. The default for new accounts is subscription. Both modes hit the same $0.05/GiB/month effective rate. The only practical difference is when the money leaves your balance — same trade-off as VM subscription vs PAYG. See Billing model for the wider money flow including the rotation rule.

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Region and project binding

To “move” data across regions: take a snapshot in the source region, restore in the destination region, then delete the original.

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Resize behaviour

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API endpoints

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See also