IBM ServeRAID-8 Series, Best Practices And Maintenance Information

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Depending on whether the RAID configuration is redundant, recovering an array
when a member hard disk drive has an active PFA alert requires different actions.
Make sure that there is a recent backup of the data before you proceed.
If the affected array is a redundant logical drive (RAID 1, 1E, 5, 6, 5EE, 10, 1E0,
50, or 60), the controller protects and keeps the data available to you while the
logical drive is critical. The following procedure provides the steps to replace the
PFA drive and to regenerate the Critical logical drive back to an online or Okay
state. If a qualified hot-spare drive is configured, ServeRAID automatically uses the
hot-spare drive to regenerate logical drives to an Optimal state.
If the affected array is a nonredundant logical drive (a simple volume, RAID 0, or
RAID 00), all data on the logical drive is lost when the disk eventually fails. To
recover the logical drive, you must delete the nonredundant array and recreate it;
then, you can restore the data from a recent backup.
To replace a PFA drive, complete the following steps:
1. Make sure that you back up the data.
2. Identify the slot location of the PFA drive. (Use the ServeRAID Manager
application, the IBM ServeRAID Support CD, or the arcconf identify
command.)
3. Mark the drive Defunct and wait for the amber LED to light. (Use the ServeRAID
Manager application, the IBM ServeRAID Support CD, or the arcconf setstate
command.)
4. Without removing the drive completely, gently remove the physical drive from
the connector, using the handle of the tray.
5. Wait 45 seconds to allow the hard disk drive motor to completely stop spinning.
6. Remove the defunct drive from the slot and insert the replacement hard disk
drive.
7. For redundant arrays, go to step 8. For nonredundant arrays, recreate the array
and restore the data from a recent backup.
8. Observe the drive for normal device startup behavior and LED activity. Within
approximately one minute, the ServeRAID controller and the ServeRAID
Manager application detect the hot-swap event. Depending on the configuration,
the following actions occurs:
v
The replacement hard disk drive spins up.
v The green drive activity LED begins flashing and might eventually turn off or
flash rapidly, depending on the configuration.
v
If no hot-spare drive is defined, ServeRAID Manager automatically initiates a
rebuild operation to the replacement disk (the green LED flashes rapidly and
the amber LED flashes).
v
If a hot-spare drive is defined and copy back is enabled, ServeRAID Manager
automatically performs a rebuild operation back to the replaced drive, after
the hot-spare drive rebuild operation is completed.
v The steady amber drive LED turns off after a transition to a Hot-Spare,
Ready, or Online state is completed. Otherwise, the amber LED is flashing
during a rebuild or copy back operation
9. Observe the drive for normal device startup behavior and LED activity:
v The replacement hard disk drive spins up.
v
The activity LED (green drive LED) begins flashing and might eventually turn
off or flash rapidly, depending on the configuration.
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ServeRAID-8 Series: Best Practices and Maintenance Information