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Oracle Solaris ZFS Administration Guide     Oracle Solaris 11 Express 11/10
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Document Information


1.  Oracle Solaris ZFS File System (Introduction)

2.  Getting Started With Oracle Solaris ZFS

3.  Oracle Solaris ZFS and Traditional File System Differences

4.  Managing Oracle Solaris ZFS Storage Pools

5.  Managing ZFS Root Pool Components

6.  Managing Oracle Solaris ZFS File Systems

7.  Working With Oracle Solaris ZFS Snapshots and Clones

8.  Using ACLs and Attributes to Protect Oracle Solaris ZFS Files

9.  Oracle Solaris ZFS Delegated Administration

10.  Oracle Solaris ZFS Advanced Topics

11.  Oracle Solaris ZFS Troubleshooting and Pool Recovery

Identifying ZFS Failures

Missing Devices in a ZFS Storage Pool

Damaged Devices in a ZFS Storage Pool

Corrupted ZFS Data

Checking ZFS File System Integrity

File System Repair

File System Validation

Controlling ZFS Data Scrubbing

Explicit ZFS Data Scrubbing

ZFS Data Scrubbing and Resilvering

Resolving Problems With ZFS

Determining If Problems Exist in a ZFS Storage Pool

Reviewing zpool status Output

Overall Pool Status Information

Pool Configuration Information

Scrubbing Status

Data Corruption Errors

System Reporting of ZFS Error Messages

Repairing a Damaged ZFS Configuration

Resolving a Missing Device

Physically Reattaching a Device

Notifying ZFS of Device Availability

Replacing or Repairing a Damaged Device

Determining the Type of Device Failure

Clearing Transient Errors

Replacing a Device in a ZFS Storage Pool

Determining If a Device Can Be Replaced

Devices That Cannot be Replaced

Replacing a Device in a ZFS Storage Pool

Viewing Resilvering Status

Repairing Damaged Data

Identifying the Type of Data Corruption

Repairing a Corrupted File or Directory

Repairing ZFS Storage Pool-Wide Damage

Repairing an Unbootable System

A.  Oracle Solaris ZFS Version Descriptions


Repairing a Damaged ZFS Configuration

ZFS maintains a cache of active pools and their configuration in the root file system. If this cache file is corrupted or somehow becomes out of sync with configuration information that is stored on disk, the pool can no longer be opened. ZFS tries to avoid this situation, though arbitrary corruption is always possible given the qualities of the underlying storage. This situation typically results in a pool disappearing from the system when it should otherwise be available. This situation can also manifest as a partial configuration that is missing an unknown number of top-level virtual devices. In either case, the configuration can be recovered by exporting the pool (if it is visible at all) and re-importing it.

For information about importing and exporting pools, see Migrating ZFS Storage Pools.