Connecting Storage Expansion Enclosures To The Ds4300 - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

|
|
|
|

Connecting storage expansion enclosures to the DS4300

|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
For specific information about how to cable the storage subsystem and storage
expansion enclosures, see "Connecting storage expansion enclosures to the
DS4300."
Attention: Before powering on the DS4300 storage subsystem, it must be
populated with at least two drives. If at least two drives are not installed in each
attached storage expansion enclosure or DS4300 storage subsystem, when you
power on the DS4300 and its attached storage expansion enclosures, your
standard storage partition key might be lost and must be regenerated using
instructions on the IBM DS4000 Solutions and Premium Features Web site:
http://www-912.ibm.com/PremiumFeatures/
In addition, the resulting insufficient load to the enclosure power supplies might
cause them to intermittently appear as failed, falsely indicating the power supplies
are bad. All drives in the DS4300 storage subsystem and the connected storage
expansion enclosure or enclosures must contain no prior configuration data.
After you install the DS4300 dual-controller storage subsystem (Model 60U/60X),
you can connect DS4000 EXP storage expansion enclosures.
Note: You cannot connect storage expansion enclosures to the DS4300
single-controller storage subsystem (Model 6LU/6LX). If you are using the
DS4300 single-controller storage subsystem, skip this section.
You can connect storage expansion enclosures any time after you install the
storage subsystem, even while it is turned on and processing data. You can even
install one storage expansion enclosure now and an additional storage expansion
enclosure later.
Up to 112 drives (including the 14 drives inside the DS4300 chassis) can be
supported by the DS4300 dual controller storage subsystems. The maximum
number of drives in a DS4300 subsystem depends on the models. (See the Notes
below for more information.
In addition, if there is a mix of 14-drive (EXP7x0/EXP100) and 16-drive (EXP810)
storage expansion enclosures behind a DS4300, the maximum number of drives in
the drive loop will be decrease depending on the combinations/mix of 14-drive
(EXP7x0/EXP100) and 16-drive (EXP810) storage expansion enclosures. See
Table 11 on page 50.
Chapter 3. Cabling the storage subsystem
45