Release Notes

Fixed Issues
The following sections summarize the issues fixed in Storage Center 7.1.
Fixed Issues Related to Data Reduction
The following issues are fixed in Storage Center 7.1:
Table 3. Fixed Data Reduction Issues in Storage Center 7.1.30
Issue Description
SCOS-45843 A large number of events might be generated in the Storage Center system log if a Storage Profile is
modified to no longer include the RAID level/tier of the original Storage Profile.
SCOS-43864 A storage system might experience read latency spikes while Deduplication is running.
SCOS-42569 A storage system might experience read latency during ingestion of data on a volume with
Deduplication enabled.
SCOS-42446 Data ingestion might fail if a number of drives are removed from a storage system during a RAID
restripe operation.
SCOS-42281 Controllers in a storage system might reboot due to stale metadata pointer access.
SCOS-42024 In rare instances, increased latency might occur because of high CPU utilization while performing data
progression on a storage system with Deduplication enabled volumes.
SCOS-38263 A storage system might report more used drive space than actual used drive space after the
rehydration of compressed data.
SCOS-21857 A storage system might experience high CPU utilization during data ingestion.
Table 4. Fixed Data Reduction Issues in Storage Center 7.1.20
Issue Description
SCOS-40135 A storage system with Deduplication enabled might display a false positive metadata validation failure
message in the Storage Center console and generate validation failure alerts in the Deduplication map
table.
SCOS-39128 A storage system with Deduplication enabled might experience increased latency while expiring
deduplicated data or during Data Progression.
SCOS-34642 A controller might reset if too many storage system resources are consumed during Deduplication and
snapshot expiration of deduplicated pages.
SCOS-27942 A storage system with Deduplication enabled might fail to remove page pool devices during a RAID
rebalance because of performance issues.
SCOS-24830 A controller might reset during lost space recovery in the Deduplication page manager.
SCOS-24167 A storage system with Deduplication enabled volumes might experience performance issues during
the Deduplication page manager clean-up process.
SCOS-22379 The Compression and Deduplication page manager defragmentation process might cause high CPU
utilization and impact system performance.
SCOS-21671 Rehydration of deduplicated or compressed data does not place the data in the tier specified by the
volume storage profile.
SCOS-19002 Enabling deduplication on a storage system while one controller is in a failed state might result in
volumes that appear to be deduplicated, when in fact they are not deduplicated.
Table 5. Fixed Data Reduction Issues in Storage Center 7.1.12
Issue Description
SCOS-32152 A storage system with Deduplication or Compression enabled that is running low on system memory
might experience I/O errors, performance degradation, and premature Live Volume failovers.
Dell Storage Center 7.1 Release Notes 11