IBM System Storage DS3000, Programming Manual

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If you do not specify the unconfigured space or free space, the FlashCopy repository logical drive is
placed in the same subsystem as the base logical drive. If the subsystem where the base logical drive
resides does not have enough space, this command fails.
When you assign the disk drives, if you set the
enclosureLossProtect
parameter to
TRUE
and have
selected more than one disk drive from any one enclosure, the storage subsystem returns an error. If you
set the
enclosureLossProtect
parameter to
FALSE
, the storage subsystem performs operations, but the
subsystem that you create might not have enclosure loss protection.
When the controller firmware assigns the disk drives, if you set the enclosureLossProtect parameter to
TRUE , the storage subsystem returns an error if the controller firmware cannot provide disk drives that
result in the new subsystem having enclosure loss protection. If you set the
enclosureLossProtect
parameter to
FALSE
, the storage subsystem performs the operation even if it means the subsystem might
not have enclosure loss protection.
Enclosure Loss Protection and Drawer Loss Protection
When you assign the drives, if you set the
enclosureLossProtect
parameter to
TRUE
and have selected
more than one drive from any one enclosure, the storage subsystem returns an error. If you set the
enclosureLossProtect
parameter to
FALSE
, the storage subsystem performs operations, but the subsystem
that you create might not have enclosure loss protection.
When the controller firmware assigns the drives, if you set the
enclosureLossProtect
parameter to
TRUE
,
the storage subsystem returns an error if the controller firmware cannot provide drives that result in the
new subsystem having enclosure loss protection. If you set the
enclosureLossProtect
parameter to
FALSE
,
the storage subsystem performs the operation even if it means the subsystem might not have enclosure
loss protection.
The
drawerLossProtect
parameter defines if data on a logical drive is accessible if a drawer fails. When
you assign the drives, if you set the
drawerLossProtect
parameter to
TRUE
and select more than one drive
from any one drawer, the storage subsystem returns an error. If you set the
drawerLossProtect
parameter
to
FALSE
, the storage subsystem performs operations, but the subsystem that you create might not have
drawer loss protection.
If you have a storage configuration that includes a drive expansion enclosure that has drawers to hold
the drives, follow these guidelines when configuring enclosure loss protection:
v
If you set
enclosureLossProtect
to
TRUE
, then you must set
drawerLossProtect
to
TRUE
.
v
If you set
enclosureLossProtect
to
FALSE
, then you can set
drawerLossProtect
to either
TRUE
or
FALSE
.
If you set
enclosureLossProtect
to
TRUE
and
drawerLossProtect
to
FALSE
, the storage subsystem returns
an error.
Scheduling FlashCopies
The
enableSchedule
parameter and the
schedule
parameter provide a way for you to schedule automatic
FlashCopies . Using these parameters, you can schedule FlashCopies daily, weekly, or monthly (by day or
by date). The
enableSchedule
parameter turns on or turns off the ability to schedule FlashCopies . When
you enable scheduling, you use the schedule parameter to define when you want the FlashCopies to
occur.
This list explains how to use the options for the schedule parameter:
v immediate
– As soon as you enter the command, a FlashCopy logical drive is created and a
copy-on-write operation begins.
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IBM System Storage DS3000, DS4000, and DS5000: Command Line Interface and Script Commands Programming Guide