Release Notes

Issue Description
SCOS-48621 In rare instances, deduplication and compression might erroneously return pagepool pages with
incorrect tags, which cause payload error counts to be incremented on the pagepool freelist.
SCOS-47507 Slow deduplication ingest rates might occur when multiple Storage Center processes are working on
the same volume simultaneously.
SCOS-46684 A controller might reset because of multiple small memory allocation requests.
SCOS-46391 On a storage system in an unbalanced state that has volumes with deduplication or compression
enabled, rebalancing the local ports might fail after creating a Copy Mirror Migrate to new volumes
with deduplication or compression enabled.
SCOS-44165 Increased Data Progression run times might occur if a storage system is using deduplication and
switches to compression only because of delays in freeing metadata space.
SCOS-44137 Storage Center data optimization might fail to stop after 72,000 seconds (20 hours).
SCOS-43550 Data optimization pause settings are not enforced for compression to deduplication and deduplication
to compression data migrations.
SCOS-42781 In rare instances, increased latency might occur during deduplication or data progression on a storage
system running Storage Center 7.2.11
SCOS-42539 The defragmentation process that runs at the end of the data progression post stage is a lengthy
process and increases the data progression run time.
SCOS-42286 Deduplication ingest might fail to occur when expected on an unbalanced storage system after a
Rebalance Local Ports operation is performed.
SCOS-42026 Deduplication and compression might continually skip some volumes due to reaching the 20 hour
runtime limit.
SCOS-41825 The deduplication and compression statistics at the volume level are inaccurate.
Fixed Issues Related to Hardware
The following issues are fixed in Storage Center 7.3:
Table 14. Fixed Hardware Issues in Storage Center 7.3.20
Issue Description
SCOS-56774 On storage systems that use Chelsio T3 iSCSI HBAs with port two enabled, the HBA might send TCP
Reset commands to remote initiators on the wrong port.
SCOS-55735 On storage systems that use Chelsio T5/T6 iSCSI HBAs, a Configured Adapter missing or
failed: error might occur after a controller is reset.
SCOS-55572 On storage systems that use Chelsio T3 iSCSI HBAs, connectivity issues might occur if the iSCSI
driver memory allocations exceed a pre-defined threshold.
Table 15. Fixed Hardware Issues in Storage Center 7.3.11
Issue Description
SCOS-52053 A Storage Center that is in distributed spare mode might select the wrong disk spare for SC460 or
SCv360 expansion enclosures.
Table 16. Fixed Hardware Issues in Storage Center 7.3.6
Issue Description
SCOS-53489 A storage system with iSCSI HBAs running a Chelsio T420 driver might experience elevated latency
on replication connections.
SCOS-53386 A storage system with iSCSI HBAs running a Chelsio T420 driver might experience lost connectivity to
the iSCSI ports.
SCOS-52494 The ports on 25 GbE and 100 GbE iSCSI mezzanine cards are reversed in the Storage Manager Client
and Unisphere web interface.
Storage Center 7.3 Release Notes 13