MicroNet Fibre to SAS/SATA II RAID Subsystem Instrukcja Użytkownika Pobierz pdf (Strona 114)

Fibre to SAS/SATA II RAID Subsystem

114

User Manual

Appendix 1 Volume Mapping in Dual Controller Mode

In dual controller mode, the RAID subsystem has 2 Controllers, which work in

Active/Standby-Standby/Active mode.

In Active/Standby-Standby/Active mode, Volume Sets assigned even-numbered

LUNs are active in Controller 1 and standby Controller 2, and Volume Sets assigned

odd-numbered LUNs are standby in Controller 1 and active in Controller 2.

NOTE: In Dual Controller mode, when using SATA disk drives (with

dongle boards) it is recommended to create only a single Volume

Set in a Raid Set (group of drives). For SAS disk drives, no

problem to create several Volume Sets per Raid Set.

NOTE: In Dual Controller mode, if Controller 1 fails, Controller 2 will take

over. The fail over mode is called “Round Robin with Subset”

(using MS Windows term).

IMPORTANT: MPIO must be configured on the host system(s), in

order for redundant LUNs (two paths via Controller 1 and 2) to

appear as single LUNs.

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