Release Notes

Known Issues Related to Data Reduction
The following known issues are related to Data Reduction:
Table 27. Known Data Reduction Issues
Issue Description
SCOS-13237 The Storage Type Data Reduction statistics might be incorrect if the amount of data eligible
for Data Reduction contains fewer than 256 pages.
Workaround: None
Known Issues Related to Hardware
The following known issues are related to hardware:
Table 28. Known Hardware Issues
Issue Description
SCOS-52646 The boot cycle of an SC9000 controller might stop responding or restart several times
because of an issue in the BIOS or pre-boot sequence.
Workaround: Perform a cold boot of the SC9000 controller by disconnecting both power
cables from the controller, waiting one minute, and then reconnecting the power cables to
controller.
SCOS-49735 On SCv3000 series, SC5020, or SC7020 storage systems, the ports on Intel branded SFP+
modules in XL710 mezzanine cards might go into an infinite up and down loop.
Workaround: Use Dell branded SFP+ modules in XL710 mezzanine cards instead of Intel
branded SFP+ modules.
Known Issues Related to Replications and Live Volumes
The following known issues are related to replications and Live Volumes:
Table 29. Known Replication and Live Volume Issues
Issue Description
SCOS-60092 If Live Volume is enabled on a storage system, and a Live Volume auto failover occurs during a
Storage Center firmware upgrade, the Live Volume on the storage system might become
inaccessible.
Workaround: Disable Live Volume Auto Failover before performing upgrades or known
maintenance on a storage system. Enable Live Volume Auto Failover after the work on the
storage system is complete.
SCOS-59752 When replicating from a Storage Center to a PS Group, if the size of the replica reserve is set
to 105%, an in-progress replica is deleted on the destination PS Group when the borrowing
space limit is exceeded. The source Storage Center reports that the remote disk is down and it
enters a retrying state.
Workaround: Reseed the replication and set the size of the replica reserve to 200%.
SCOS-55072 If a Windows host reboots after a volume is successfully Live Migrated to a secondary storage
system, the host may be unable to access the volume.
Workaround: Contact technical support.
SCOS-41280 Using a cluster shared volume (CSV) on a Storage Center within a Windows 2016 cluster
solution might result in an I/O failure during an infrastructure fault condition where one of the
Windows hosts is isolated from both its peer and its quorum witness.
Workaround: Use redundant physical switches to reduce the possibility of the I/O failure.
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