# Aiven: Major incident: Aiven Dynamic Disk Sizing (DDS) failures

**Summary:** Aiven reported a major Dynamic Disk Sizing (DDS) incident: resize operations could fail for a small subset of newly created nodes. It ran from 2026-07-29 14:29 UTC to 2026-07-29 17:07 UTC, lasting 2 h 37 min. Aiven mitigated all impacted nodes and deployed a fix to prevent recurrence. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-07-29 14:29 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://status.aiven.io/incidents/01KYQ4F5YRVX37CD90CPZMBZZJ](https://status.aiven.io/incidents/01KYQ4F5YRVX37CD90CPZMBZZJ)
- [Company: Aiven](https://rewindex.com/company/aiven.md)
- Versions: before (none: first archived) → after incident\_version:133/01KYQ4F5YRVX37CD90CPZMBZZJ@673343dd34d4
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Aiven Dynamic Disk Sizing (DDS) failures
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-07-29 14:29 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-07-29 17:07 UTC
```

**6. Added: Update** (investigating) · 2026-07-29 14:29 UTC

```diff
+ We are investigating an issue affecting Dynamic Disk Sizing (DDS), where resize operations may fail for a small subset of newly created nodes. Mitigations are currently underway.
```

**7. Added: Update** (identified) · 2026-07-29 15:17 UTC

```diff
+ Issue has been identified and fixes are being applied. Thank you for your patience.
```

**8. Added: Update** (resolved) · 2026-07-29 17:07 UTC

```diff
+ Our team has successfully applied the appropriate mitigation to all impacted nodes, and the fix has been deployed to prevent future occurrences.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-07-29 14:29 UTC | Major incident: Aiven Dynamic Disk Sizing (DDS) failures (this change) | outage |

All Aiven changes: [timeline](https://rewindex.com/company/aiven/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


---
Canonical: https://rewindex.com/change/i9d98fb589e9e68 · Markdown: https://rewindex.com/change/i9d98fb589e9e68.md · JSON: https://rewindex.com/api/v1/changes/i9d98fb589e9e68 · Generated 2026-10-18T02:29:37.446Z