The primary and secondary systems must be connected using multimode or single-mode optical fibre cables. As shown in the following table, the cables and data path relay equipment required depend on the distance between the P-VOL and S-VOL storage systems.
|
Distance |
Fibre cable type |
Data path relay equipment |
|---|---|---|
|
0 km to 1.5 km (4,920 feet) |
Multimode shortwave Fibre Channel interface cables. |
Switch is required for 0.5 km to 1.5 km. |
|
1.5 km to 10 km (4,920 feet to 6.2 miles) |
Single-mode longwave2 optical fibre cables. |
Not required. |
|
10 km to 30 km (6.2 miles to 18.6 miles) |
Single-mode longwave2 Fibre Channel interface cables. |
Switch is required. |
|
Greater than 30 km (18.6 miles)1 |
Communications lines are required. |
Approved third-party channel extender products.3 |
|
Notes:
|
||
With Fibre Channel connections using switches, no special settings are required for the physical storage system.
Direct connections up to 10 km with single-mode longwave Fibre Channel interface cables are supported. Using the long-distance cables (longwave and communication line) causes the transfer performance degradation and the increased transfer delay depending on the connection distance. Make sure to verify the I/O performance before the installation of the long-distance cable. If the 10 km longwave cable is used, the transfer delay of about 0.1 ms occurs and the transfer speed is about 2 Gbps per port.
Customer support can provide the latest information about the availability of serial-channel TrueCopy connections.