Fujitsu ETERNUS DX100 S5 - Reverse Cabling; Figure 17 Reverse Cabling (ETERNUS DX600 S5)

Reverse Cabling
Because the ETERNUS DX uses reverse cabling connections for data transfer paths between controllers and
drives, continued access is ensured even if a failure occurs in a drive enclosure.
If a drive enclosure fails for any reason, access to drives installed in the drive enclosures subsequent to the failed
drive enclosure is maintained because normal access paths are secured by using reverse cabling.
Figure 17 Reverse Cabling (ETERNUS DX600 S5)
CM#0 CM#1
C
E
IOM#0 IOM#1
DE#01
IOM#0 IOM#1
DE#02
IOM#0 IOM#1
DE#03
IOM#0 IOM#1
DE#04
IOM#0 IOM#1
DE#05
IOM#0 IOM#1
DE#06
IOM#0 IOM#1
DE#06
CM#0 CM#1
C
E
IOM#0 IOM#1
DE#01
IOM#0 IOM#1
DE#02
IOM#0 IOM#1
DE#03
IOM#0 IOM#1
DE#04
IOM#0 IOM#1
DE#05
Failure
Reverse cabling connection
(Connect the contr
oller enclosure to the last drive enclosure)
Continued access is available to drives
in the drive enclosures that follow the failed one.
A failure occurs
in a drive enclosure
:
Accessible
:
Inaccessible
2. Basic Functions
Data Protection
57 Design Guide