Release Notes

Issue Description
SCOS-31054 Enabling Deduplication on a volume that is part of a replication might result in hundreds of
Ingestion failure due to SecondaryStorage infrastructure is not ready
log messages.
SCOS-21275 After updating from Storage Center 7.1.1, a storage system might fail to enable Deduplication on some
volumes.
Table 6. Fixed Data Reduction Issues in Storage Center 7.1.3
Issue Description
SCOS-20960 The IOPS of a storage system might decrease, and I/O latency might increase significantly because of
high CPU usage during the Data Progression defragmentation process.
SCOS-20449 A controller reset might occur because of out of range memory access during the Data Progression
defragmentation process.
SCOS-20240 Data Progression might fail to move pages to tier 3 for volumes that are larger than 32 TB. If a
specific history has multiple view volumes, Data Progression might fail to move pages for volumes
smaller than 32 TB.
SCOS-20075 A storage system with Flash Optimized storage types and Deduplication enabled might suffer an
outage during On Demand Data Progression if the system is low on space in tier 1 RAID 10.
SCOS-19570 A storage system running Storage Center 7.1 with compression enabled and over 25 TB of data
ingested into the Deduplication process might suffer from I/O delays because of high CPU usage at
the end of Data Progression.
Table 7. Fixed Data Reduction Issue in Storage Center 7.1.2
Issue Description
SCOS-19580 The front-end I/O performance of a storage system might degrade during Data Progression after a
few terabytes of data are ingested into the Deduplication process.
Table 8. Fixed Data Reduction Issues in Storage Center 7.1.1
Issue Description
SCOS-14931 On Demand Data Progression may not complete successfully when Deduplication is enabled on a
volume.
SCOS-13649 Volumes on separate controllers might show the same Deduplication reduction rates when the
Deduplication reduction rates are different.
SCOS-13159 Deduplication and Compression might take volumes offline when responses to storage type status are
incorrect.
Fixed Issues Related to Hardware
The following issues are fixed in Storage Center 7.1:
Table 9. Fixed Hardware Issues in
Storage Center 7.1.30
Issue Description
SCOS-41806 Storage system iSCSI ports might hibernate when a failed TCP checksum is received on an inbound
packet.
SCOS-41452 Larger than normal Ping payloads might cause a storage system iSCSI I/O card to hibernate.
SCOS-36797 A target port on a storage system with Fibre Channel host bus adapters might fail to respond to an
incoming login attempt.
SCOS-20800 In certain degraded conditions, data miscompares might occur when running software FCoE on an
Intel X520 adapter in an ESXi 5.5 or 6.0 host.
SCOS-16813 A single disk with failing I/Os might cause storage system-wide performance degradation.
12 Dell Storage Center 7.1 Release Notes