Data Domain: Troubleshooting SAS Issues
Summary: This KB provides links to the most referenced Dell Knowledge Base articles related to issues with Data Domain Serial Attached SCSI (SAS) components. Common SAS components are Host Bus Adapters (HBAs), Disk Array Enclosures (DAEs), and cabling. ...
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Table of the most popular Knowledge Base (KB) articles relating to SAS connectivity issues on Data Domain systems:
| Linked KB # | Title | Summary |
| 000204344 | Data Domain: SAS or MPATH Alerts | All Data Domain systems have path redundancy (multipath) for attached enclosures and disks by SAS connectivity. If communication to any component on the SAS path is interrupted, then an appropriate alert notification is generated. |
| 000035680 | SAS Cable Configuration, Topology checks, and Testing | This document aims to help troubleshooting possible cable connection issues on SAS links to attached storage. |
| 000035684 | Adding External Storage Capacity (ES30/DS60) while the System is online. | This KB article describes the steps to expand external storage while the Data Domain System is operating. |
| 000078449 | Reinstate path issue | Abnormal paths in failed_list. | This article addresses a DD OS issue which results in instability on the backend (SAS) connections to Enclosures or Disks on various Data Domain platforms. |
| 000045202 | Invalid SAS cable topology detected after upgrade or reboot | Invalid SAS cable topology detected after upgrade or reboot |
| 000201701 | DD6300: Data Domain DD6300 Without an External Facing SAS HBA Running DDOS Versions 7.5.x.x, 7.6.x.x, 7.7.0.x, 7.7.1.x, 7.7.2.x, or 7.8.x.x Does Not Post Alerts for Disk Issues. | Disk Failures are not posted on DD6300 configured without an external facing SAS HBA when running DDOS versions 7.5.x.x, 7.6.x.x, 7.7.0.x, 7.7.1.x, 7.7.2.x, or 7.8.x.x. |
| 000202561 | PowerProtect DP Series Appliance and IDPA: Customer Advisory Regarding Urgent Drive Firmware Upgrade | This Customer Advisory: MG07 SAS Hard Drive EIOB Firmware Version; leads to drives reported as "missing" and potential Data Loss if more than two (2) drives report "missing" within the same RAID Group. Dell Technologies is recommending an immediate upgrade to DISK FIRMWARE EIOC version (or higher) to maintain optimal system performance and to avoid experiencing this issue. |
| 000030164 | Incorrect number of SAS controllers to support the CLOUD-TIER CAPACITY License. | License file has content error, "Incorrect number of SAS controllers to support CLOUD-TIER CAPACITY License" |
Affected Products
Data DomainProducts
Data Domain Deduplication Storage Systems, Data Domain ReplicatorArticle Properties
Article Number: 000223813
Article Type: How To
Last Modified: 16 Sept 2025
Version: 5
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