Adaptec 2169400-R User Guide - Page 81

Working with Hot Spares, Hot Spare Limitations, Dedicated Spare or Global Spare?

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Chapter 6: Managing Logical Drives and Hot Spares ● 81 3 In the menu bar, select Actions, then click Delete logical device. 4 When prompted, click Yes to delete the device, or No to cancel the deletion. If you click Yes, the logical drive is deleted. The disk drives or drive segments included in the logical drive become available, and can be used to create a new logical drive (see page 70), or to expand an existing logical drive (see page 77). Working with Hot Spares A hot spare is a disk drive that automatically replaces any failed drive in a logical drive, and can subsequently be used to rebuild that logical drive. (For more information on recovering from a disk drive failure, see page 135.) Hot Spare Limitations ● You can't create a hot spare for RAID 0 logical drives, simple volumes, or spanned volumes. ● You can't create a hot spare from a disk drive that is already part of a logical drive. ● You should select a disk drive that is at least as big as the largest disk drive it might replace. ● Adaptec recommends that you not designate a SAS hot spare for a logical drive comprising SATA disk drives, or a SATA hot spare for a logical drive comprising SAS disk drives. Dedicated Spare or Global Spare? A global hot spare is not assigned to a specific logical drive and will protect any logical drive on the controller (except RAID 0 logical drives). You can designate a global hot spare before or after you build logical drives on a controller; you can also designate a global hot spare while you're creating a logical drive. To designate a global hot spare, see page 82. A dedicated hot spare is assigned to one or more specific logical drives and will only protect those logical drives. (A dedicated hot spare that has been assigned to protect more than one logical drive is called a pool spare.) You must create the logical drive before you can assign a dedicated hot spare. To assign a dedicated hot spare or pool hot spare, see page 83.

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Chapter 6: Managing Logical Drives and Hot Spares
●
81
3
In the menu bar, select
Actions
, then click
Delete logical device
.
4
When prompted, click
Yes
to delete the device, or
No
to cancel the deletion.
If you click
Yes
, the logical drive is deleted. The disk drives or drive segments included in the
logical drive become available, and can be used to create a new logical drive (see
page 70
), or
to e
xpand an existing logical drive (see
page 77
).
Working with Hot Spares
A
hot spare
is a disk drive that automatically replaces any failed drive in a logical drive, and can
subsequently be used to rebuild that logical drive. (For more information on recovering from a
disk drive failure, see
page 135
.)
Hot Spare Limitations
●
You can’t create a hot spare for RAID 0 logical drives, simple volumes, or spanned volumes.
●
You can’t create a hot spare from a disk drive that is already part of a logical drive.
●
You should select a disk drive that is at least as big as the largest disk drive it might replace.
●
Adaptec recommends that you
not
designate a SAS hot spare for a logical drive comprising
SATA disk drives, or a SATA hot spare for a logical drive comprising SAS disk drives.
Dedicated Spare or Global Spare?
A
global
hot spare is not assigned to a specific logical drive and will protect any logical drive on
the controller (except RAID 0 logical drives). You can designate a global hot spare before or
after you build logical drives on a controller; you can also designate a global hot spare while
you’re creating a logical drive. To designate a global hot spare, see
page 82
.
A
dedicated
hot spare is assigned to one or more specific logical drives and will only protect
those logical drives. (A dedicated hot spare that has been assigned to protect more than one
logical drive is called a
pool
spare.) You must create the logical drive before you can assign a
dedicated hot spare. To assign a dedicated hot spare or pool hot spare, see
page 83
.