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Head-to-head · Block Storage Services

Google Persistent Disk vs IBM Cloud Block Storage

  • Updated Oct 2026
  • Both researched from official sources
  • 7 checks side by side
Higher score Google Persistent Disk #2 in Block Storage Services 9.3/10 Free plan Free plan✓ 4 of 4 features Visit Google Cloud
IBM Cloud Block Storage #6 in Block Storage Services 8.8/10 Paid ✓ 2 of 4 features Visit IBM Cloud

Google Persistent Disk leads on 3 checks, IBM Cloud Block Storage on 1, and 3 are even. Who comes out ahead on the 7 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreGoogle Persistent Disk · 9.3/10
  • Free planonly Google Persistent Disk
  • Most featuresGoogle Persistent Disk · 4 of 4

Google Persistent Disk scores higher on our rubric for block storage services: 9.3 against 8.8 out of 10; our editors rank them #2 and #6.

Google Persistent Disk leads on max volume size: 64 TB versus 32 TB. Google Persistent Disk offers multi-attach; IBM Cloud Block Storage doesn't. Google Persistent Disk offers cross-region replication; IBM Cloud Block Storage doesn't. IBM Cloud Block Storage leads on maximum iops: 64000 IOPS versus 15000 IOPS.

Google Persistent Disk is the better fit for low-cost Compute Engine storage. IBM Cloud Block Storage is the better fit for IBM Cloud VPC workloads.

  • Google Persistent Disk fits best

    Low-cost Compute Engine storage

  • IBM Cloud Block Storage fits best

    IBM Cloud VPC workloads

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Side by side

Feature Google Persistent Disk 9.3/10 Visit ↗ IBM Cloud Block Storage 8.8/10 Visit ↗
At a glance
Editor score 9.3 8.8
Ranking #2 in Block Storage Services #6 in Block Storage Services
Best for Low-cost Compute Engine storage IBM Cloud VPC workloads
Pricing model Free plan + paid Paid
Starting price — Not checked yet
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Cloud Cloud
Platforms Linux, Windows Web
Support Docs Phone, Tickets, Community, Docs
Integrations 3 integrations 4 integrations
Built for Small business, Mid-market, Enterprise Mid-market, Enterprise
Features Google Persistent Disk 4/4 · IBM Cloud Block Storage 2/4
Snapshots ✓ ✓
Multi-attach ✓ (best) —
Encryption ✓ ✓
Cross-region replication ✓ (best) —
Specs
Max volume size 64 TB (best) 32 TB
Volume types Standard, Balanced, SSD, Extreme sdp, general-purpose, 5iops-tier, 10iops-tier, custom
Maximum IOPS 15000 IOPS 64000 IOPS (best)
Our review
Pros
  • Free tier includes up to 30 GB of standard Persistent Disk storage
  • Supports online resizing, incremental snapshots, and automatic encryption
  • Offers Multi-writer mode plus regional and cross-region replication
  • Profiles support tiered, custom, and defined-performance configurations.
  • Supports volumes up to 32,000 GB and performance up to 64,000 IOPS.
  • Offers snapshots, encryption, and provisioning through Terraform, CLI, API, and console.
Cons
  • Designed primarily for Compute Engine workloads
  • Pricing varies by region and usage
  • Maximum IOPS depends on disk size and attached VM machine type
  • There is no multi-attach support for sharing a volume across instances.
  • Cross-region protection uses snapshot copying rather than live volume replication.
  • The service is paid and pricing varies by region, profile, capacity, and billing period.
Our verdict

Google Persistent Disk provides durable, network-attached block storage for Google Cloud Compute Engine virtual machines and containers. It supports boot and data disks, general-purpose applications, databases, and large…

Read the review →

IBM Cloud Block Storage provides persistent SSD-backed block volumes for IBM Cloud VPC virtual servers and containerized applications. It supports both boot and data volumes, making it suitable for enterprise applications, databases,…

Read the review →
  1. Google Persistent DiskBlock Storage Services 9.3Free plan
  2. IBM Cloud Block StorageBlock Storage Services 8.8Paid

Strengths and trade-offs

  • Google Persistent Disk — where it wins

    • Free tier includes up to 30 GB of standard Persistent Disk storage
    • Supports online resizing, incremental snapshots, and automatic encryption
    • Offers Multi-writer mode plus regional and cross-region replication

    Where it doesn't

    • Designed primarily for Compute Engine workloads
    • Pricing varies by region and usage
    • Maximum IOPS depends on disk size and attached VM machine type

  • IBM Cloud Block Storage — where it wins

    • Profiles support tiered, custom, and defined-performance configurations.
    • Supports volumes up to 32,000 GB and performance up to 64,000 IOPS.
    • Offers snapshots, encryption, and provisioning through Terraform, CLI, API, and console.

    Where it doesn't

    • There is no multi-attach support for sharing a volume across instances.
    • Cross-region protection uses snapshot copying rather than live volume replication.
    • The service is paid and pricing varies by region, profile, capacity, and billing period.
  • Google Persistent Disk9.3/10 · Free plan

    A flexible Compute Engine storage service with free capacity, snapshots, encryption, and replication.

    Visit Google CloudFull verdict →
  • IBM Cloud Block Storage8.8/10 · Paid

    A flexible block storage service for IBM Cloud VPC workloads and Kubernetes storage.

    Visit IBM CloudFull verdict →

More comparisons

All block storage services comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update