AMCC 3ware 9000 Series, User Manual

Page: 113 / 202

Removing a Unit
www.3ware.com 107
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.
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 111.
Removing a Unit Through 3DM
Note:
If you do not have hot swap carriers, you do not need to
remove a unit via 3DM. Simply power down the system and
remove the applicable drives. Refer to your system’s user guide for
details on removing fixed disks. If you do have hot swap carriers,
follow the steps below.
1 Make sure no I/Os are being issued to 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.
2 Unmount the unit.
This step is very important. If a unit is not unmounted and you remove
it, it is the equivalent of physically yanking a hard drive out from under
the operating system. Resulting behavior depends on which operating
system you are using and what kind of I/O is being done, however you
will typically see really bad results, bad errors, and most likely a reset of
the controller or a system hang.
Under Windows, go to Start > Administrative Tools > Computer
Management , and select Disk Management. Remove the logical drive
letter for the unit.
Under Linux and FreeBSD, you can unmount the unit with this command:
umount <mount location>
3 In 3DM, choose Management > Maintenance .
4 In the Unit Maintenance table on the Maintenance Page, select the unit
you want to remove and click Remove Unit .