IBM System Storage DS3000 Programming Manual page 44

from any one enclosure, the storage subsystem returns an error. If you set enclosureLossProtect
parameter to FALSE, the storage subsystem performs operations, but the subsystem that you create might
not have enclosure loss protection.
If you set the enclosureLossProtect parameter to TRUE, the storage subsystem returns an error if the
controller firmware cannot find drives that will enable the new subsystem to have enclosure loss
protection. If you set the enclosureLossProtect parameter to FALSE, the storage subsystem performs the
operation even if it means that the subsystem might not have enclosure loss protection.
2
In the enclosures that have drawers for holding the drives, such as EXP5060, DCS3700, and DCS3700
storage subsystem with Performance Module Controllers enclosures, drawer loss protection determines
whether data on a logical drive is accessible or inaccessible if a drawer fails. To help make sure that your
data is accessible, set the drawerLossProtect parameter to TRUE. For drawer loss protection to work,
each drive in an subsystem must be in separate drawers. If you have a storage subsystem configuration
in which an subsystem spans several enclosures, you must make sure that the setting for drawer loss
protection works with the setting for enclosure loss protection. If you set the enclosureLossProtect
parameter to TRUE, you must set the drawerLossProtect parameter to FALSE, the storage subsystem
returns an error message and a storage subsystem configuration will not be created.
3
To determine if a free capacity area exists, run the show subsystem command.
4
The default disk drive (drive type) for DS3000 is SAS. The default disk drive (drive type) for
DS4000/DS5000 is fibre (Fibre Channel).
If you set the enclosureLossProtect parameter to TRUE, the storage subsystem returns an error if the
controller firmware cannot find disk drives that will enable the new subsystem to have enclosure loss
protection. If you set the enclosureLossProtect parameter to FALSE, the storage subsystem performs the
operation even if it means that the subsystem might not have enclosure loss protection.
5
The T10PI parameter applies to the drives in an subsystem. Using the T10PI parameter, you can specify
that protected drives must be selected for an subsystem. If you want to set the T10PI parameter to
enabled, all of the drives in the subsystem must be capable of T10 PI (Protection Information). You
cannot have a mix of drives that are capable of T10 PI (Protection Information) and drives that are not
capable of T10 PI (Protection Information) in the subsystem.
6
The logicalDrivesPersubsystemCount parameter is the number of equal-capacity logical drives per
subsystem.
7
The securityType parameter enables you to specify the security setting for an subsystem that you are
creating. All of the subsystems are also set to the security setting that you choose. Available options for
setting the security setting include:
v none – The subsystem is not secure.
v capable – The subsystem is security capable, but security has not been enabled.
v enabled – The subsystem is security enabled.
Note: A storage subsystem security key must already be created for the storage subsystem if you want to
set securityType=enabled. (To create a storage subsystem security key, use the create
storageSubsystemsecurityKey command).
8
In certain versions of Storage Manager, FullDiskEncryption was referred to as safestoreSecurity and
ExternalKeyManager was referred to as safeStoreExtenalKeyMgr. Depending on the version of the
controller firmware, you might have to use the following terms instead of the ones listed here
(storagePartition2 | storagePartition4 | storagePartition8 | storagePartition16 |
storagePartition64 | storagePartition96 | storagePartition128 | storagePartition256 |
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IBM System Storage DS3000, DS4000, and DS5000: Command Line Interface and Script Commands Programming Guide