Celerra NX4 Integrated Unified Storage
{"Image DocumentName": "Celerra NX4 Integrated Unified Storage", "Image ImageDescription": "EMC Celerra Family Technical Review. December Architecture and Packaging. X-Blade Enclosure. DART operating system. Single blade. Online upgrade to dual. Dual blades. Primary/standby with automatic failover. Primary/primary with quick reboots. IP connectivity (per blade): Four 10/100/1000 Copper ports. Control Station. n + 1 power. Disk Processor Enclosure. FLARE operating environment. Dual active Storage Processors. Automatic failover. 12 SAS and/or SATA drives. Fibre Channel option\u2014four Fibre Channel ports. \u017d. Note to Presenter: View in Slide Show mode for animation. The basic design principle for the integrated Celerra NX4 is to use CLARiiON CX3 hardware for the X- Blade front end and CLARiiON AX4 hardware for the storage-processor back end. The control flow is handled by the Control Station. The X-Blade Enclosure contains the X-Blade 4. To clients on the network, a Celerra looks like any other file server or iSCSI target. The X-Blades feature EMC\u2019s Data Access in Real Time (DART) embedded system software, which is optimized for file I/O. The Celerra NX4 is available with one or two X-Blades, and can be upgraded from single to dual while online. Each X-Blade contains four 10/100/1000 Ethernet (Copper) ports. The Control Station is used to configure, manage, and upgrade the X-Blades, as well as to manage X-Blade failover. The Celerra NX4 is typically configured as primary/standby\u2014that is, with one X-Blade designated to act as standby. It waits, fully booted, for the primary X-Blade to fail. During this wait, there is no performance degradation on failover. In the event that the primarily X-Blade fails, the standby X-Blade will take the load from the primary, then present itself to the network as the failed X-Blade. In the other option, called primary/primary, both X-Blades are active. Should a X-Blade fail, it will quickly reboot and present itself back to the network. Note to Presenter: Primary/primary is not recommended for critical data. During the reboot, the data will be inaccessible. If the X-Blade fails due to a hardware problem, the data will be inaccessible until it is replaced. The Disk Processor Enclosure (DPE) uses dual active Storage Processors for disk I/O. These processors run the FLARE microcode, a proven, robust RAID implementation. The Disk Processor Enclosure supports automatic failover should one of the Storage Processors fail. The DPE also houses up to 12 disk drives in the Celerra NX4 (SAS and ATA). On the Celerra NX4, SAS and SATA drives can be mixed in the same shelf. The Fibre Channel option allows the DPE to be shared with Fibre Channel hosts directly via the four additional Fibre Channel ports or with a standard Fibre Channel switch. Note to Presenter: The Celerra NX4 can be upgraded to the Fibre Channel option. The Fibre Channel option is a chargeable item. \uf090 SAN. \u0152. Upgradeable to Fibre Channel option.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}