Recommended RAID Group Configuration
In an ETERNUS DX, a controller enclosure is connected to drive enclosures with multiple paths.
ETERNUS DX600 S6/DX900 S6
There are no restrictions on the installation locations of drives that configure a RAID group.
The ETERNUS DX600 S6 has four connection paths and the ETERNUS DX900 S6 has eight connection paths.
Data reliability can be improved by taking the connections into consideration when distributing drives to configure a RAID group.
Data reliability when drive enclosures fail can be improved by selecting configuration drives that are distributed to a larger number of drive enclosures even within the same connection.
ETERNUS DX8900 S6
Reliability can be improved by locating drives across controller enclosures or by taking into consideration the connection path when configuring a RAID group.
As with drives in drive enclosures, drives in controller enclosure can be used to create RAID groups. RAID groups can be created with a mix of drives in the controller enclosure and drives in the drive enclosures.
To create a RAID group manually, keep the recommended placement in mind for the configured drive that is described here.
For details on the recommended number of drives that configure a RAID group, refer to RAID Group.
When selecting a RAID level such as RAID1 and RAID1+0 that configure mirroring within a RAID group, reliability is improved by installing paired drives in different drive enclosures that belong to two or more separate connections.