Release Notes

Issue Description
SCOS-42286 Deduplication ingest might fail to occur when expected on an unbalanced storage system after a
Rebalance Local Ports operation is performed.
Table 7. Fixed Data Reduction Issues in Storage Center 7.2.40
Issue Description
SCOS-49144 Data progression might stop running or the Storage Center might reset when a payload checksum
failure occurs due to table entries being read incorrectly from memory.
SCOS-44137 Storage Center data optimization might fail to stop after 72000 seconds (20 hours).
SCOS-42026 Deduplication and compression might continually skip some volumes due to reaching the 20 hour
runtime limit.
Table 8. Fixed Data Reduction Issues in Storage Center 7.2.31
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.
Table 9. Fixed Data Reduction Issues in Storage Center 7.2.30
Issue Description
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 10. Fixed Data Reduction Issues in Storage Center 7.2.11
Issue Description
SCOS-42157 Performing a non-service affecting update of a dual-controller storage system to Storage Center
7.2.10 might result in I/O timeouts for some volumes when the controllers are running different
versions of the Storage Center software.
Table 11. Fixed Data Reduction Issues in Storage Center 7.2.10
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.
12 Dell Storage Center 7.2 Release Notes