A highly available and expandable, rack-dense, 2U dual-socket SMP server, for application serving in Web environments
Data is written concurrently to both channels. If a DIMM fails in one of the DIMMs in the primary channel, it is instantly disabled and the mirrored (backup) memory in the other channel becomes active (primary) until the failing DIMM is replaced. Mirroring can be accomplished with multiples of four DIMMs (one pair per memory channel).
When online hot-spare memory is enabled, using single and/or dual-rank DIMMs one rank is set aside per branch as online spares in case one of the other ranks fails. The spare rank must have capacity at least that of the largest active rank. Up to 40GB (using 12 single-rank 4GB DIMMs) or 44GB (using 12 dual-rank 4GB DIMMs) of memory is available when the hot-spare feature is active. (The lowest-numbered rank of those with the highest capacity in each branch is used for the hot-spares.)
Either of these features requires operating system support.
When multiples of four DIMMs (4/8/12) are installed, the x3650 operates in four-way interleaved mode, for higher performance. When only two DIMMs are used, the system defaults to two-way interleaved mode.
DIMMs must be installed in pairs. Memory is available in kits consisting of two 512MB, 1GB, 2GB or 4GB DIMMs.
High-Performance Adapter Slots
The x3650 provides four physical x8 (“by 8”) PCI-E (PCI Express) adapter slots standard. Each is capable of supporting x1/x4/x8 adapters. Slot 1 is full-length/full-heightand Slot 2 is half- length/full-height. Electrically they are x8 slots as well (meaning that they operate at full x8 4GBps speeds). Slots 3 and 4 are low-profile/full-lengthslots, wired for x4 speeds (2GBps). This provides the flexibility to use x8 cards in those slots (although running at x4 speeds.) If desired, the riser card containing slots 1 and 2 may optionally be replaced with one that provides two 64-bit(1Gbps) 133MHz PCI-Xslots instead, one full-length/full-heightand one half-length/full-height.
PCI-Expressis a high-performance, low-latency, next-generation serial I/O bus that is rapidly replacing the older parallel PCI and PCI-X buses. A x8 PCI-E adapter offers approximately four times the maximum throughput of a 133MHz PCI-X adapter4. (A x1 adapter offers throughput similar to a 66MHz PCI-X slot.)
Because the SAS, ServeRAID-8k and 8k-l, dual Gigabit Ethernet, systems management and video controllers are integrated onto the system board, the four adapter slots are all available, which offers you a wide degree of latitude in expansion options.
Hot-Swap/Redundant Components
System availability is maximized through the extensive use of hot-swap and redundant components, including:
•Redundant memory protection (with Chipkill protection plus, memory mirroring or online hot-spare memory enabled)
•Hot-swap, redundant hard disk drives (with RAID-0/1/10 protection standard and RAID- 1E/5/6 optional)
•Hot-swap, redundant power supplies (optional)
•Hot-swap, redundant cooling fans (optional)
Large HDD Storage Capacity
The x3650 offers a choice of disk storage, supporting up to six (3.5-inch) or eight (2.5-inch) hot-swaphigh-performance Serial-Attach SCSI (SAS) drives, or up to six (3.5-inch) hot-swapSerial-ATA (SATA) drives:
3.5-inch SAS
•15,000 RPMs — 73.4, 146.8 or 300GB (1.8TB maximum)
2.5-inch SAS
•10,000 RPMs — 73.4 or 146.8GB (1.17TB)
•15,000 RPMs — 73.4GB (587.2GB)
3.5-inch SATA
•7,200 RPMs — 160, 250, 500, 750GB or 1TB (6.0TB)
2-5-inch drives not only require less space than 3.5-inch drives, they weigh less, consume half the power, produce less noise, seek faster, and offer increased reliability.
(Note: The use of the internal backup drive option precludes the use of two drive bays, limiting storage to four 3.5-inch HDDs.)
4Actual throughput will depend on the adapter vendor’s implementation.
