IBM System Storage Ideas Portal


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Status Submitted
Workspace IBM Storage Virtualize / FlashSystem
Created by Guest
Created on Oct 21, 2026

RELATED IDEAS

Reduce DRAID Rebuild Time for Samsung SSDs to Within 60 Minutes on FlashSystem

The customer has observed significant differences in DRAID rebuild performance across different FlashSystem configurations:

  • FS7300: 22 x 7.68TB Samsung SSD, Stripe Width 12, Rebuild Time: 160 minues (80% utilization of 120TB)

FS7300: 18 × 9.6 TB FCM4, Stripe Width 12, Rebuild Time: 249 minutes (80% utilization of 120TB)

FS7600: 32 x 6.6TB FCM5, Rebuild Time: 16 minutes, Copyback time: 3 hours (80% utilization of 120TB)

Following the optimization of the DRAID rebuild algorithm for FCM5 Small during FS7600 PoC by TSMC, FS7600 can complete a rebuild in approximately 16 minutes.

The customer has purchased a significant number of FS7600 systems and expects comparable improvements in rebuild performance for Samsung SSD-based configurations.

Feature Request

Request IBM Storage Development to optimize the DRAID rebuild algorithm for Samsung SSDs, leveraging the improvements introduced for FCM5 Small where technically applicable.

Target Requirement

  • Reduce DRAID rebuild time for Samsung SSD-based configurations to within 60 minutes.

Evaluate whether the FCM5 Small rebuild algorithm optimizations can be applied or adapted to Samsung SSD configurations.

Minimize the time spent in a degraded state to improve data protection and system availability.

Business Justification

The customer has made a substantial investment in FS7600 systems and has observed significant rebuild performance improvements following the FCM5 Small algorithm optimization. The current rebuild times for Samsung SSD-based configurations remain substantially longer, creating a gap in expected resiliency performance.

Improving Samsung SSD rebuild performance to within 60 minutes would help align the customer experience with the improvements demonstrated on FCM5 Small and better meet the customer's operational and resiliency requirements.

Idea priority High

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