Memory 32GB per SC4020 array (16GB per controller)
Network/server connectivity (front-end)
Fibre Channel model: 8 x 8Gb FC ports per SC4020 array (4 per controller) or 4 x 16Gb FC ports per SC4020 array (2 per controller); simultaneous multiprotocol support available with optional upgrade to firmware v6.6. Management/Replication ports may also provide two ports of front-end iSCSI network I/O per controller.
iSCSI model: 4 x 10Gb iSCSI ports per SC4020 array (2 per controller); additional iSCSI network connectivity available with optional upgrade to firmware v6.6. Management/Replication ports may also provide two more ports of front-end iSCSI per controller.
Internal drive connectivity (back-end) 4 x 6Gb SAS ports per SC4020 array (2 per controller)
NAS deployment connectivity (optional) Supports file-based storage via FS8600 NAS appliance
Product OS Storage Center 6.5 or greater
Array configurations All-flash, hybrid or HDD arrays
Auto-tiering method Policy-based migration based on real-time data usage, customizable 512KB-4MB page size.
Auto-tiering structure Up to 3 primary (media-based) tiers total, up to 2 SSD tiers (write- and read-intensive SSDs)
Tiering customizations User-defined profiles, option to “pin” volumes to any tier
RAID support RAID 0, 1, 5, 6, RAID 10, and RAID 10 DM (Dual Mirror); any combination of RAID levels can exist on a single array
RAID tiering Auto-provisions and dynamically restripes multiple RAID levels on the same tier; no need to pre-allocate RAID groups
Thin provisioning Active by default on all volumes, operates at full performance across all features
Thin snapshots Records changes only, snapshots auto-migrate to lower-cost storage
Intelligent deduplication and compression Selectable option per volume on SSD and/or HDD tiers Compression-only option also available
Standard replication Synchronous/Asynchronous using FC or iSCSI
Federated multi-array systems Live Migrate (included in base product) enables host-transparent data movement among arrays Volume Advisor continually monitors federation to suggest optimal data placement based on custoizable capacity or performance load balancing policies Dell Storage Manager provides data center-level viewpoint and control
Coexistence with PS Series arrays Replication in either direction Day-to-day management from a single interface Thin import: space-efficient, non-disruptive data migration from PS Series arrays
Business continuity Live Volume auto-failover, auto-repair VMware Metro Stretch Cluster support Microsoft® Azure Site Recovery
Application data protection Restore host-side data from array in Oracle, Microsoft or VMware environments
Data-at-rest encryption Self-encrypting drives (SEDs) in SSD or HDD formats Full Disk Encryption (FCE) based on AES-256 Drives certified to FIPS 140-2 Level 2 Key Management Server (KMS) options available for FIPS 140-2 Level 1, 2 and 3