Chapter 4: Subsystem Connection and Operation

 

 

 

 

 

 

 

 

 

 

 

Drive

Via system bus, through the backplane

 

 

 

 

 

 

 

4th DIP Switch

Hub enabled/disabled

 

 

 

 

 

 

 

 

 

 

 

 

Configuration Information

 

 

 

 

 

 

 

 

 

RAID Controllers

2

 

 

 

 

 

 

 

 

Application Servers

2

 

 

 

 

 

 

 

Data path Connection

Fault-tolerant paths

 

 

 

 

 

 

Host Channel Bandwidth

800 MBps

 

 

 

 

 

 

 

Max. Number of Drives

24

 

 

 

 

 

 

 

This is a direct-attached configuration showing two (2) host computers sharing the storage volume of one (1) RAID subsystem. Disk drives in the enclosure can be configured into one or more arrays, and made available through individual host ports.

Operating system(s) might boot from the array. Operating using a protected capacity decreases the chance of server downtime. The logical arrays can be associated with different controller IDs on different host channels so that if a cable link fails, the host can still access the arrays through another channel link. File locking or access management utilities will be necessary to avoid access conflicts.

Depending on I/O characteristics, each configured array should be properly optimized either for Random or Sequential I/Os.

Multiple logical drives or multiple RAID partitions can be created and made available separately through different ID/LUNs on the host ports.

4.4.2Direct-attached Connections with Data Link Fault Tolerance

This is a direct-attached configuration making use of all connection points and shares storage with four (4) host computers, each of the host computers with two

(2) single-ported HBAs for path redundancy.

Subsystem Connection and Operation

4-15

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321 Studios GHDX2-2430S-24F4D manual Direct-attached Connections with Data Link Fault Tolerance