IBM DS4000 family

The IBM System Storage EXP3000 is a high-density 2U, 19" rack-mountable driven closure designed for supporting a total of 12 Serial Attached SCSI (SAS) 3.5-inch disk drives.

The dual-port MegaRAID 8480 adapter is optimized for cost-sensitive and space-limited environments that demand both feature-rich and high-performance solutions. The adapter delivers an intelligent and robust RAID solution supporting RAID levels 0, 1, 10, 5, and 50, and utilizing a high-performance Intel I/O processor for optimum RAID performance and a PCI-Express host interface for increased bandwidth.

Together, the EXP3000 and MegaRAID 8480 leverage leading Serial-attached SCSI (SAS), the new interface technology with broad industry commitment and interoperability behind it. A maximum of four EXP3000s can be cascaded from the MegaRAID 8480 adapter to support a total of 48 disks while simultaneously improving performance of the configuration due to higher number of disks.

• IBM System Storage EXP3000 FeaturesSAS 10,000-rpm capacities 73 GB, 146 GB, 300 GB
  SAS 15,000-rpm capacities 36 GB, 73 GB, 146 GB
  Point-to-point architecture
  Customer replaceable components
  Two SAS 4x connections at the rear of the board for external connections
  Single ESM
  
• MegaRAID 8480 featuresRAID 0, 1, 5, 10, and 50
  64 logical drive support
  Online capacity expansion
  RAID level migration (RLM)
  Configuration on disk (COD)
  Patrol read & S.M.A.R.T. support
  MegaRAID Manager GUI included with MegaRAID 8480
  

The IBM System Storage EXP420 Storage Expansion Unit (18128VH) is a Serial Advanced Technology Attachment (SATA) disk-only storage expansion unit for use with the DS4200 Express Model 7V.
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• Compact and scalableCompact, 3U rack-mount disk expansion enclosure that accommodates 16 DS4200 SATA Enhanced Value Disk Drive Modules (EV-DDMs), offering up to 8 TB of physical capacity per expansion unit.
  
• Hot-swappable componentsRedundant, hot-swappable power supply and cooling components
  

The DS4000 EXP810 is the latest disk drive enclosure in the DS4000 Series of products. This 3U enclosure has 4 Gbps Fibre Channel (FC) interfaces, and supports up to 16 disk drives.
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• ScalableThe 4 Gbps ready IBM System Storage EXP810 Storage Expansion Unit machine type (1812-81A) offers a new 16-bay disk enclosure for attachment to selected DS4000 Midrange Disk Systems, with up to 4.8 terabytes (TB) physical capacity per expansion unit using sixteen 300 GB disk drives. The EXP810 Storage Expansion Unit is designed to accommodate 2 Gbps Fibre Channel Enhanced Disk Drive Modules (E-DDM), as well as 4 Gbps Fibre Channel Enhanced Disk Drive Modules (E-DDM), or 4 Gbps Serial ATA Enhanced Disk Drive Modules(E-DDM).
  
• AC and DC support Supports redundant (AC) or (DC) power and cooling modules, and ESM interfaces.