User's Manual

Physical Disks or Physical Devices 201
into a server or an enclosure. If the physical disk is not contained in a carrier but is
instead designed to be connected with a SCSI cable (typically a ribbon cable), then
the Blink and Unblink tasks are disabled.
Remove Dead Segments
Does my controller support this feature? See Supported Features.
The Remove Dead Segments task recovers disk space that is currently
unusable. A dead or orphaned disk segment refers to an area of a physical disk
or physical device that is unusable for any of the following reasons:
• The dead segment is an area of the physical disk or physical device that is
damaged.
• The dead segment is included in a virtual disk, but the virtual disk is no
longer using this area of the physical disk or physical device.
• The physical disk or physical device contains more than one virtual disk. In
this case, disk space that is not included in one of the virtual disks may be
unusable.
• The dead segment resides on a physical disk or physical device that has
been disconnected from and then reconnected to the controller.
Prepare to Remove
Does my controller support this feature? See Supported Features.
Use the Prepare to Remove task to spin down a physical disk or physical
device so that it can safely be removed from an enclosure or backplane. It is
recommended that you perform this task before removing a disk or device to
prevent data loss.
This task causes the lights on the disk to blink. You can safely remove the disk
or device under the following conditions:
• Wait for about 30 seconds to allow the disk to spin down.
• Wait until you notice the initial blink pattern has changed into a different
pattern or the lights have stopped blinking.