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Hewlett Packard Enterprise | a00138814en_us
Advisory: Microsoft Windows - Windows Server 2019/2022 May Experience a 30-Second Pause in IO when Alletra 9000 or Primera 600 Series Performs a Port Failback After a Host Port Goes Offline
Last update date:
4/24/2024
Affected products:
HPE Alletra 9000
HPE Primera 600 Storage
Affected releases:
No affected releases provided.
Fixed releases:
No fixed releases provided.
Description:
Info
If a port fails on the storage system, the port fails over to the partner port when port persistence is enabled. This failover happens with minimal disruption to the host IO. The failback may see the host IO pause and cause a delay for up to 30 seconds. The problem is seen with Emulex HBAs and Qlogic HBAs installed in the host.
Scope
This has been seen with Microsoft Windows Server 2019 and 2022 but other versions may also be affected.
Resolution
HPE is currently investigating this issue in conjunction with OS Vendors. As a workaround to avoid the problem, HPE recommends that the HBA values are changed to reduce the delay. EMULEX HBA: Change the NodeTimeOut values from default of 30 to 2, using the Emulex HBA Manager or the OC Manager. Refer to this document . QLOGIC HBA: Change the PortDownRetryCount value from default of 30 to 2, using a Windows Admin Center plugin or the QConvergedconsole. Refer to this document . This will reduce the host IO delay to 2 seconds. Note that this time can be set to a different value more suited to the storage environment needs. This document will be updated when more information becomes available. RECEIVE PROACTIVE UPDATES : Receive support alerts (such as Customer Advisories), as well as updates on drivers, software, firmware, and customer replaceable components, proactively in your e-mail through HPE Support Alerts. Sign up for Support Alerts at the following URL: HPE Email Preference Center. NAVIGATION TIP: For hints on navigating HPE.com to locate the latest drivers, patches and other support software downloads, refer to the Navigation Tips document. SEARCH TIP: For hints on locating similar documents on HPE.com, refer to the Search Tips document.
