Purpose
Checks and repairs an Oracle ACFS file system on the Solaris operating system.
Syntax and Description
fsck -F acfs -o h /dev/null fsck -F acfs [{-n|N}|{-y|Y}] [-o options] volume_device
fsck
-F
acfs
-o
h
/dev/null
displays usage text and exits.
Table 16-7 contains the options available with the fsck
command.
Table 16-7 Options for the Solaris fsck command
Option | Description |
---|---|
|
Specifies the type of file system on Solaris. |
|
Answers no to any prompts. |
|
Answers yes to any prompts. |
|
Specifies that options follow (a, f, h, v). Options are preceded with the
|
|
Specifies an Oracle ADVM device file. |
fsck
checks and repairs an existing Oracle ACFS file system. This command can only be run on a dismounted file system. root
privileges are required to run fsck
. The Oracle ACFS driver must be loaded for fsck
to work.
By default, fsck
only checks for and reports any errors. The -o
a
option must be specified to instruct fsck
to fix errors in the file system. Do not interrupt fsck
during the repair operation.
In a few cases, fsck
prompts for questions before proceeding to check a file system. These cases include:
If fsck
detects that another fsck
is in progress on the file system
If fsck
detects that the Oracle ACFS driver is not loaded
If the file system does not appear to be Oracle ACFS
In checking mode, fsck
also prompts if there are transaction logs that have not been processed completely due to an incomplete shutdown. To run in a non-interactive mode, include either the -y
or -n
options to answer yes or no to any questions.
fsck
creates working files before it checks a file system. These working files are created in /usr/tmp
if space is available. /tmp
is used if /usr/tmp
does not exist. If insufficient space is available in the tmp
directory, fsck
attempts to write to the current working directory. The files that fsck
creates are roughly the size of the file system being checked divided by 32K. At most three such files are allocated. For example, a 2 GB file system being checked causes fsck
to generate one to three 64K working files in the /usr/tmp
directory. These files are deleted after fsck
has finished.
In the event that fsck
finds a file or directory in the file system for which it cannot determine its name or intended location (possibly due to a corruption in its parent directory), it places this object in the /lost+found
directory when fsck
is run in fix mode. For security reasons only the root
user on Linux can read files in /lost+found
. If the administrator can later determine the original name and location of the file based on its contents, the file can be moved or copied into its intended location.
The file names in the /lost+found
directory are in the following formats:
parent.id.file.id.time-in-sec-since-1970 parent.id.dir.id.time-in-sec-since-1970
The id
fields are the internal Oracle ACFS numeric identifiers for each file and directory in the file system.
You can use acfsutil
info
id
id
mount_point
to attempt to determine the directory associated with parent.
id
. This directory is assumed to be where the deleted object originated. For information about acfsutil
info
, see "acfsutil info file".
If the parent directory is not known, the parent id
field is set to UNKNOWN
.
Examples
The following example shows how to check and repair an Oracle ACFS file system.