Chapter 3: Replacing Disk Shelf Devices
51
Replacing an LRC/ESH/ESH2/ESH4 module
About a module
The LRC/ESH/ESH2/ESH4 module in a DS14, DS14mk2 FC, DS14mk4 FC
includes a SCSI-3 Enclosure Services Processor. It maintains the integrity of the
loop when disks are swapped and provides signal retiming for enhanced loop
stability. There are two modules in the middle of the rear of the disk shelf, one for
Channel A and one for Channel B.
Note
The Input and Output ports on module A on the disk shelves are inverted from
module B.
Connectors in a module:
The modules have the following connectors.
For detailed
information
This section provides information about the following topics:
◆
◆
◆
◆
Hot-upgrading or hot-downgrading a disk shelf
Module connector
Function
Input
Provides the interface between the disk shelf and
the storage controller.
Output
Provides the interface between two disk shelves to
create a loop of daisy-chained disk shelves.
Содержание DiskShelf 14mk2 FC
Страница 10: ...x Preface...
Страница 41: ...Chapter 2 Monitoring the Disk Shelf 31 For DS14mk4 FC...
Страница 42: ...32 Monitoring the Fibre Channel disk...
Страница 106: ...96 Index...