git: d99ea11554 - main - status/report-2023-01-2023-03/fsx.adoc: Add report

From: Alan Somers <>
Date: Thu, 16 Mar 2023 20:16:14 UTC
The branch main has been updated by asomers:


commit d99ea1155457f881b521b80837c19d859c85a8d1
Author:     Alan Somers <>
AuthorDate: 2023-03-15 15:27:59 +0000
Commit:     Alan Somers <>
CommitDate: 2023-03-16 20:15:37 +0000

    status/report-2023-01-2023-03/fsx.adoc: Add report
    Reviewed by:    grahamperrin
    Differential Revision:
 .../content/en/status/report-2023-01-2023-03/fsx.adoc  | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

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+=== FSX
+Links: +
+link:[GitHub] URL:[] +
+link:[FreshPorts] URL:[]
+Contact: Alan Somers <>
+The venerable FSX (File System eXerciser) tool, first written at Apple Computer in the nineties, has been a part of FreeBSD since 5.0.
+It stress tests file systems with a stream of randomly generated operations, verifying file data after every read.
+However, it has never been installed as part of the OS; it only exists in the source tree.
+That makes it difficult to use in CI pipelines.
+It has some other limitations, too.
+So this quarter I rewrote the entire tool in Rust.
+The rewrite is byte-for-byte compatible with the original, given identical seed values.
+Future versions will break backwards-compatibility, however, in order to add new features like `fspacectl` and `copy_file_range`.
+The new version can be found in the ports tree, and in time I'll remove the original.