Non-stop RAID group capacity expansion - Logical Device Expansion

Logical Device Expansion allows the capacity of an existing RAID group to be dynamically expanded by changing of the RAID level or the drive configuration of the RAID group. When this function is performed, drives can be also added at the same time. By using this LDE function to expand the capacity of an existing RAID group, a new volume can be added without having to add new RAID groups.

Expand the RAID group capacity (from RAID5(3D+1P) ⇒ RAID5(5D+1P))

Logical device expansion1

Change the RAID levels (from RAID5(3D+1P) ⇒ RAID1+0(4D+4M))

Logical device expansion2


  • Enables RAID group capacity increases by adding disk drives while retaining data
  • Enables reorganization of RAID groups to different levels and different capacities at the same time

Product Requirements

Supported StoragesAll-Flash ArraysETERNUS AF150 S3
ETERNUS AF250 S3/S2, AF250
ETERNUS AF650 S3/S2, AF650
Hybrid Storage SystemsETERNUS DX60 S5/S4/S3
ETERNUS DX100 S5/S4/S3, DX200 S5/S4/S3
ETERNUS DX500 S5/S4/S3, DX600 S5/S4/S3
ETERNUS DX8700 S3/S2, DX8900 S4/S3
ETERNUS DX60 S2, DX80 S2, DX90 S2
ETERNUS DX400 S2 series
Supported ServersMission Critical IA/UNIX/Industry Standard Server

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Further Information

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