|This version of this document is no longer maintained. For the latest documentation, see http://www.qnx.com/developers/docs.|
Check an entire Power-Safe filesystem for consistency (QNX Neutrino)
|You must be logged in as root to run this utility.|
chkqnx6s [-sv] host
- Display header information from the superblock.
The number of -v options controls which fields
If you specify -s, chkqnx6fs locates and verifies the active superblock, but doesn't check the filesystem itself.
- Increase output verbosity. You can specify multiple -v options.
- The host of the filesystem. You can specify this as a block-special device or partition (e.g. /dev/hd0t76), as a regular file, or as the root directory of a mounted fs-qnx6 filesystem (which will be resolved to the real host device).
The chkqnx6fs performs a consistency check on a Power-Safe (fs-qnx6) filesystem. The check is conducted in these passes:
- Locate and verify superblocks and select the newest stable one.
- Traverse the system inodes and bitmap files.
- Recursively walk the directory hierarchy from the root.
Only a stable filesystem can be checked (i.e. one that isn't going to change or be updated during the scan). A stable filesystem is one of the following:
- mounted read-only
- mounted read-write with snapshots disabled (in which case the stable filesystem, not the working copy, is checked)
|You shouldn't actually need to use chkqnx6fs in a production system (e.g. in a boot script). The design of the fs-qnx6 filesystem should (in the absence of software bugs, physical bad blocks, or malicious data modification on the raw device) make any such check unnecessary.|
# chkqnx6fs -v /dev/hd0t76 ** Prelude: read and verify superblocks ** ** Pass 1 : verify bitmap and inodes ** ** Pass 2 : verify directory hierarchy ** ** Summary: 20216/8040524 blocks, 142/62816 inodes **
- The filesystem is consistent/stable.
- An error occurred checking the filesystem (descriptive messages are written to stderr).
Backing Up and Recovering Data in the Neutrino User's Guide
“Power-Safe filesystem” in the Filesystems chapter of the System Architecture guide
“Power-Safe filesystem” in the Filesystems chapter of the Neutrino User's Guide