Seagate ST34572WC Especificações descarregar pdf (Página 22)

7. 6. Replacing the Disk (Releases Prior to 11i v3 or When LVM Volume Group is Configured with

Only Legacy DSFs on 11i v3 or Later)

If you decide to replace the disk, you must perform a five-step procedure. How you perform each step

depends on the information you gathered earlier (hot-swap information, logical volume names, and

recovery strategy), so this procedure varies.

This section also includes several common scenarios for disk replacement, and a flowchart

summarizing the disk replacement procedure. Restore any lost data onto the disk.

The five steps are:

1. Temporarily halt LVM attempts to access the disk.

2. Physically replace the faulty disk.

3. Configure LVM information on the disk.

4. Re-enable LVM access to the disk.

5. Restore any lost data onto the disk.

In the following steps, pvname is the character device special file for the physical volume. This name

might be /dev/rdsk/c2t15d0 or /dev/rdsk/c2t1d0s2.

Step1: Halting LVM Access to the Disk

This is known as detaching the disk. The actions you take to detach the disk depend on whether the

data is mirrored, if the LVM Online Disk Replacement functionality is available, and what applications

are using the disk. In some cases (for example, if an unmirrored file system cannot be unmounted),

you must shut down the system. The following list describes how to halt LVM access to the disk:

 If the disk is not hot-swappable, you must power down the system to replace it. By shutting down

the system, you halt LVM access to the disk, so you can skip this step.

 If the disk contains any unmirrored logical volumes or any mirrored logical volumes without an

available and current mirror copy, halt any applications and unmount any file systems using these

logical volumes. This prevents the applications or file systems from writing inconsistent data over the

newly restored replacement disk. For each logical volume on the disk:

o If the logical volume is mounted as a file system, try to unmount the file system.

# umount /dev/vgname/lvname

Attempting to unmount a file system that has open files (or that contains a user’s current

working directory) causes the command to fail with a Device busy message. You can use

the following procedure to determine what users and applications are causing the unmount

operation to fail:

1. Use the fuser command to find out what applications are using the file system as follows:

# fuser -u /dev/vgname/lvname

This command displays process IDs and users with open files mounted on that logical

volume, and whether it is a user’s working directory.

2. Use the ps command to map the list of process IDs to processes, and then determine

whether you can halt those processes.

3. To kill processes using the logical volume, enter the following command:

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 66 67

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