STACKIT Block Storage

STACKIT Block Storage delivers persistent SSD-backed volume storage attached to Compute Engine VMs.

Service Overview

• High IOPS Performance: Performance profiles delivering maximum IOPS for enterprise database workloads.
• Metro Fail-Safety: Replicated storage backend across availability zones guarantees data persistence.

Technical Details

• Billing: Hourly usage billing based on provisioned volume size and selected performance profile class.
• Integrations: Fully automatable via Terraform, REST API, and STACKIT Compute Engine.

Performance Classes

The values below come from the STACKIT documentation and update themselves.

From the STACKIT docsService plans › Currently available Service Plans (performance classes)Source updated 22.04.2026 · copied 05.10.2026

The following table lists currently available performance classes for the EU01 region:

Swipe sideways to see the whole table

Performance class	Name	Max. IOPS	Max. Throughput (MB/s)
Performance class 0	storage_premium_perf0	120	25
Performance class 1	storage_premium_perf1	500	50
Performance class 2	storage_premium_perf2	1000	100
Performance class 4	storage_premium_perf4	2000	150
Performance class 6	storage_premium_perf6	5000	200
Performance class 8	storage_premium_perf8	10000	250
Performance class 10	storage_premium_perf10	15000	300
Performance class 12	storage_premium_perf12	20000	350
Performance class 13	storage_premium_perf13	20000	700
Performance class 14	storage_premium_perf14	25000	400
Performance class 15	storage_premium_perf15	25000	800
Performance class 16	storage_premium_perf16	30000	450
Performance class 17	storage_premium_perf17	30000	900
Performance class 18	storage_premium_perf18	35000	500
Performance class 19	storage_premium_perf19	35000	1000
Performance class 20	storage_premium_perf20	40000	550
Performance class 21	storage_premium_perf21	40000	1100
Performance class 29	storage_premium_perf29	60000	1500

IOPS - Input/Output Operations per second

Throughput - Throughput in Megabytes per second

Thus, the classes used can be distinguished in detail based on the naming. Example: “Block Storage Premium - Performance Class 2” corresponds to SSD hard disks with max. 1000 IOPS and max. 100 Mbyte/s throughput.

What is this?

This section is copied from the STACKIT docs automatically, several times a day. It cannot be changed here. Changes belong in the STACKIT docs.

From the STACKIT docsService plans › Single vs Metro AZSource updated 22.04.2026 · copied 05.10.2026

Block Storage is offered in multiple performance classes. All of them are available both for Single Availability Zone (Single AZ) and Metro Availability Zone (Metro) setup.

Single Availability Zone (Single AZ) setup implies fixed assignment to one Availability Zone. Data in a Single AZ are not mirrored across different Availability Zones.

Metro AZ setup means fixed assignment to a region, but no fixed assignment to an Availability Zone. Data in Metro Setup are automatically mirrored across two different Availability Zones.

What is this?

This section is copied from the STACKIT docs automatically, several times a day. It cannot be changed here. Changes belong in the STACKIT docs.

Limitations & Constraints

• No Volume Shrinking: Disk volumes can be expanded, but shrinking an existing volume is unsupported.
• No Multi-Attach: A block volume can be mounted to only one VM at a time (requires File Storage for multi-VM RWX).

STACKIT documentation docs.stackit.cloud STACKIT Block Storage Documentation Open the documentation