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IBM BladeCenter HS21

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	Processor (max)		Dual-Core Intel® Xeon® up to 3.0 GHz or Quad-Core Intel Xeon up to 3.33 GHz and up to 1333 MHz front-side bus



	Number of processors (std/max)		1/2



	Cache (max)		6 MB L2 shared (dual-core) or 2x6 MB L2 (quad-core)



	Memory¹(max)		Up to 16 GB with Fully Buffered DIMMs (internal) and up to 32 GB with Memory and I/O Expansion Unit



	Internal hard disk drives		Up to two Small Form Factor (2.5") 10,000rpm SAS hard disk drives installed on each blade (support for up to three hot-swap SAS drives with optional Storage and I/O blade)



	Maximum internal storage^{1, 2}		734 GB (with optional Storage and I/O blade)



	Network interface		Dual Gigabit Ethernet (TOE capable), up to 8 ports optional



	I/O upgrade		1 PCI-X expansion card connection (traditional) and 1 PCI-Express (high-speed)



	RAID support		Integrated RAID-0 or -1 standard, integrated RAID-1E or RAID-5 optional with Storage and I/O blade



	Systems management		Integrated systems management processor



	Operating systems supported		Red Hat Linux®, SUSE Linux, VMWare ESX Server, Microsoft® Windows Server®, Open Enterprise Server (NetWare 6.5) and SUN Solaris 10



	Limited warranty³		3-year customer replaceable unit and onsite limited warranty

¹ Maximum internal hard disk and memory capacities may require the replacement of any standard hard drives and/or memory and the population of all hard disk bays and memory slots with the largest currently supported drives available. When referring to variable speed CD-ROMs, CD-Rs, CD-RWs and DVDs, actual playback speed will vary and is often less than the maximum possible.
² When referring to storage capacity, GB = 1,000,000,000 bytes and TB = 1,000,000,000,000 bytes. Accessible capacity is less.
³ IBM hardware products are made from new parts, or new and serviceable used parts. Regardless, our warranty terms apply. For a copy of applicable product warranties, write to: Warranty Information, P.O. Box 12195, RTP, NC 27709, Attn: Dept. JDJA/B203. IBM makes no representation or warranty regarding third-party products or services including those designated as ServerProven® or ClusterProven®.