DataDirect Networks EF2800, User Manual

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DataDirect Networks EF2800 FC RAID Storage System User Guide (V 1.0)
M a n a g i n g D i s k D r i v e s a n d E n c l o s u r e s
G.2 Managing Enclosures
An enclosure management processor (EMP) is a device in the
enclosure from which the EF2800 can inquire about the enclosure’s
environmental conditions such as temperature, power supply and fan
status, and the presence or absence of disk drives. The EF2800 can also
tell the EMP about RAID activities such as drive rebuilds and failed disk
drives.
If you have only one EMP, the configuration settings are automatically
enabled when the EF2800 is installed. No changes are required to the
default configuration settings to support EMP.
If you have more than one EMP, you must set up the EMP LUNs as
described in section
G.2.1 (EMP LUN) and section G.2.2 (polling
interval).
G.2.1 Setting the EMP LUN
If you have only one EMP, the configuration settings are automatically
enabled when the EF2800 is installed.
If you have more than one EMP, you must set up the EMP LUNs as
described in this section.
The EF2800 allows in-band access to the EMP in the disk enclosure
under the EF2800’s target ID using direct EMP commands. You can set
an EMP LUN to any value between 0 and 63, except where it would
conflict with a previously assigned LUN (EMP, array, or CAPI
[EF2800]). You can also set it to NONE, which tells the EF2800 not to
present a LUN for this EMP under the EF2800’s target ID.
You can set LUNs for EMPs that you plan to add by assigning a LUN to
the EMP ID you want to use. The EF2800 assigns EMP IDs sequentially
each time it starts.
NOTE: EMP LUN settings have no effect on the CAPI interface, which
always allows communication with all of the EMPs connected to the
EF2800.
You may want to change the EMP LUN if it conflicts with the LUN of
another device.