Set Hot Spare Drive - IBM System Storage DS3500 Introduction And Implementation Manual

7914Admin_Physical.fm
Figure 10-7 Controller menu
View Associated Logical Element
If you select this menu item, you can see a list of related logical objects, like Array and Logical
Drives, which are using the selected controller.
Locate
This is used to find location of the selected controller in your enclosure in the rack.
Change
Select this menu item and next menu with two configuration options that are displayed
include:
Preferred Loop ID - This is discussed in detail in 10.5, "Set preferred loop ID" on
page 275 (FC version only).
Remote Login - This is discussed in detail in 10.6, "Set remote access" on page 276
Configure
Select this menu item and next menu with two configuration options that are displayed
include:
Ethernet Management Ports - This is discussed in detail in 10.7, "Set Ethernet
management ports" on page 276
iSCSI Ports - This is discussed in detail in Chapter 13, "Administration - iSCSI" on
page 317, and this menu is available only if subsystem has iSCSI daughter card installed.

10.3 Set hot spare drive

A hot spare drive is like a replacement disk drive installed in advance. Hot spare disk drives
provide additional protection that can be essential if there is a disk drive failure in a fault
tolerant RAID array.
As DS3500 Storage Subsystem configuration can only have SAS disk types, but with different
capacities and speeds, you have to plan in advance how to provide the best hot spare
protection for your storage subsystem.
Follow these guidelines to plan your hot spare coverage properly:
Hot spare disk drives must be of the same media type and interface type as the disk drives
that they are protecting.
Hot spare disk drives must have capacities equal to or larger than the used capacity on the
disk drives that they are protecting. The DS3500 storage subsystem can use a larger drive
to recover a smaller failed drive to it. It will not use smaller drives to recover a larger failed
drive. If a larger drive is used, the remaining excess capacity is blocked from use.
FDE (SED) disk drives (encryptable) provide coverage for both security capable and
non-security capable disk drives. Non-security capable disk drives can provide coverage
only for other non-security capable disk drives.
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IBM System Storage DS3500: Introduction and Implementation Guide
Draft Document for Review March 28, 2011 12:24 pm