91
Disk Management
10
The restorer
disk
command manages disks and displays disk locations, logical (RAID) layout,
usage, and reliability statistics. See “disk” on page 213 for the complete command syntax.
Command output examples in this chapter show systems with 15 disk drives. Each type of DD400
series system reports on the number of disks actually in the system.
Each disk has two LEDs at the bottom of the disk carrier. The LED on the right glows a steady
green when the disk has power and is functioning normally. The same LED glows a steady red if
the disk has failed, or flashes green when the disk is a target of the
beacon
operation. The LED on
the left flashes green whenever the disk is accessed.
On a restorer that uses external storage, the following disk command options are not valid:
disk beacon
disk fail
disk unfail
disk show debug
disk show failure-history
disk show reliability-data
With external storage, output from all other disk commands returns information about the LUNs
and volumes accessed by the restorer.
Fail a Disk
To set a disk to the
failed
state, use the
disk fail
disk-ID
operation. To physically remove a
failed disk, see “Replace Disks” on page 174. The
disk fail
disk-ID
command asks for a
confirmation before carrying out the operation. Available to administrative users only.
disk fail
disk-ID
A failed disk is automatically removed from a RAID disk group and is replaced by the spare disk
(when the spare is available). The disk use changes from
spare
to
in use
and the status becomes
reconstructing
. See “Display RAID Status for Disks” on page 94 to list the available spare.
Note
The system can run with a maximum of two failed disks. Always replace a failed disk as
soon as possible.
Summary of Contents for DD400 Series
Page 1: ...Software Version 3 1 2 DD400 Series Restorer User Guide ...
Page 4: ......
Page 38: ...Regulatory Standards Compliance xxxviii DD400 Series Restorer User Guide ...
Page 54: ...Hardware System Level Interfaces 16 DD400 Series Restorer User Guide ...
Page 60: ...Display the Space Usage Graphs 22 DD400 Series Restorer User Guide ...
Page 96: ...The License Command 58 DD400 Series Restorer User Guide ...
Page 102: ...Return Command Output to a Remote machine 64 DD400 Series Restorer User Guide ...
Page 128: ...Clean Operations 90 DD400 Series Restorer User Guide ...
Page 138: ...Display the History of Disk Failures 100 DD400 Series Restorer User Guide ...
Page 182: ...CIFS Command 144 DD400 Series Restorer User Guide ...
Page 194: ...Procedure Replace a Replica 156 DD400 Series Restorer User Guide ...
Page 210: ...Send Log messages to Another System 172 DD400 Series Restorer User Guide ...
Page 228: ...Operations for Trained Service Personnel 190 DD400 Series Restorer User Guide ...