Removing a Unit
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Removing a Unit
Removing a unit through software (also known as 'array roaming') keeps the
data intact on the unit. It allows you to move the unit to another controller or
to store the drives for safekeeping purposes.
Removing a unit is different than deleting a unit. Deleting a unit will destroy
the data on the unit.
Removing a Unit Through 3DM2
In 3DM, the command for deleting a unit is on the Maintenance page. Be
sure to follow steps 1 and 2 in the instructions before using the Remove
command.
To remove a unit through 3DM2
1 Make sure the operating system is not accessing the unit you want to
remove.
For example, make sure you are not copying files to the unit, and make
sure that there are no applications with open files on that unit.
If you are not successful at removing your unit, usually this is because
there is currently I/O going to that unit, a message informs you that the
unit is busy. In that case, you should stop any I/O first.
2 Unmount the unit.
Make sure the unit is not mounted and not in use. You need to follow the
specific operating system guide on how to unmount the volume before
you remove a unit.
Warning: It is important to remove the unit through software, before removing it
physically. Failure to do so could result in a system crash or hang and may even
corrupt the data and the unit configuration from being reassembled later.
Power-down your system before physically removing any drive that is not in a hot
swap bay.
Note: You can also remove a drive, if you want to force a degrade on a redundant
unit, or if you want to remove a drive from the “Available Drives” list so that you can
then remove it from the system. For more information, see “Removing a Drive” on
page 130.
Note: If your drives are not in hot swap bays, you do not need to
remove a unit via 3DM2. Simply power down the system and remove
the applicable drives. Refer to your system’s user guide for details on
removing fixed disks. If your drives are in hot swap bays, follow the
steps below.
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