Advanced RAID organization for ensuring data access even during a drive enclosure failure

In ETERNUS AF/ETERNUS DX, each member disk drive of a RAID group is located in a different Drive Enclosure. This keeps the RAID group accessible even when one whole Drive Enclosure becomes unusable.

In addition, with support of RAID6 (double parity), two disk drive failures occurring in the same RAID group can be recovered. This ensures exceptional reliability.

The figure shown below is an image. The configuration will differ depending on the product.

• Benefit

  • Very high data integrity and improved system reliability

  The RAID level where DEs are deployable with reliability guaranteed.

  Supported Storages	RAID level
  ETERNUS AF650 S3/S2, AF650 ETERNUS DX500 S5/S4/S3 ETERNUS DX600 S5/S4/S3 ETERNUS DX900 S5 ETERNUS DX8700 S3/S2 ETERNUS DX8900 S4/S3 ETERNUS DX400 S2 series	RAID1, 1+0, 5, 5+0, 6

  Reference: RAID

  Product Requirements

  Supported Storages	All-Flash Arrays	ETERNUS AF650 S3/S2, AF650
  	Hybrid Storage Systems	ETERNUS DX500 S5/S4/S3, DX600 S5/S4/S3 ETERNUS DX900 S5 ETERNUS DX8700 S3/S2, DX8900 S4/S3 ETERNUS DX400 S2 series
  Supported Servers		GlobalServer and Mission Critical IA/UNIX/Industry Standard Server (*Note)

  • *Note:
    Only RAID1 is supported with GlobalServer.