Disk Drives - IBM TotalStorage NAS Gateway 500 Service Manual

Disk drives

Before performing the following procedure, read "Safety notices" on page xv.
The procedure to replace a disk drive depends on whether or not the NAS Gateway 500 has the mirroring
feature code installed.
Attention: You do not have to power off the system to remove a hot-plug disk drive. Before you perform
these procedures, ensure that the customer has taken appropriate actions to back up the data for the drive
you are removing, and that the drive has been removed from the configuration. Physically removing a
hot-plug disk drive from the system before it has been removed from the system configuration can cause
unrecoverable data corruption.
Non-mirrored disk drive replacement
Without mirroring, a bad disk drive means that there is no operating system access. If the system is not
already powered down, shutdown the system (see "Stopping the system" on page 310).
1. Open the rack front door.
2. Remove the front bezel as described in "Front bezel removal" on page 315.
3. Remove the disk drive by placing the handle on the disk drive into the open position (perpendicular to
the drive) and pulling the hot-plug disk drive away from the bay.
4. Ensure that the tray handle is open (perpendicular to the drive).
5. Align the drive/tray assembly so that it engages the guide rails in the bay.
6. Push the drive assembly into the bay until the tray handle engages the lock mechanism.
7. Push the tray handle in until it locks.
8. Go to "System backup and recovery" in the NAS Gateway 500 Administrator's Guide for instructions on
restoring the operating system.
Mirrored disk drive replacement
Attention: You do not have to power off the system to remove a hot-plug disk drive. Before you perform
these procedures, ensure that the customer has taken appropriate actions to back up the data for the drive
you are removing and that the drive has been removed from the configuration. Physically removing a
hot-plug disk drive from the system before it has been removed from the system configuration can cause
unrecoverable data corruption.
Use this procedure if you are replacing, removing, or installing a drive while the system power is turned
on.
Deconfiguring (removing) a disk drive
Use this procedure if you are removing or installing a drive while the system power is turned on.
Before removing a disk drive from a volume group, do the following:
1. Log in as root user.
2. Before a disk can be removed from a volume group, all data must be backed up and the data
removed from the disk to be replaced. Use AIX Logical Volume Manager to perform this task.
3. At the command line, type smitty.
4. Select System Storage Manager (Physical and Logical Storage) and press Enter.
5. Select Logical Volume Manager and press Enter.
6. Select Volume Groups and press Enter.
7. Select Set Characteristics of a Volume Group and press Enter.
8. Select Remove a Physical Volume from a Volume Group.
Chapter 11. Removal and replacement procedures
339