read-files

The read-files command reads specified files— an entire volume or any collection of files. This is useful for the following reasons:

The file read speed is multi-threaded for opening them, and is highly optimized. The read speed is as fast as the volume can deliver.

File read speed is fastest with large files. Reading the average 1/2 million files of a boot drive is relatively slow because of huge numbers of tiny files; each file has some overhead to be opened and read.

Running DiskTester read-files

Using DiskTester.app, choose Read Files. Suitable defaults are chosen. You can exercise more control using the command line.

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DiskTester read-files

Command line usage

The command line allows greater control. Please use disktester help read-files for details on the available options. In general, there is little reason to use the command line.

read-files
    [--xfer|-x <size[K|M|G|T]>]                             "4M"
    [--iterations|-i <count>]                               "1"
    [--verify|-v]                                           "true"
    <volume-name>|<path>[ <volume-name>|<path>]*

Examples

Various command line possibilities.

To read all files on volume Scratch 10 times:

disktester read-files --iterations 10 Scratch

To read all files on all volumes:

disktester read-files /Volumes/*

To read all files in the Applications folder, the Library folder of the home directory and the current directory:

disktester read-files /Applications ~/Library .

To read files and verify their contents (for files created with create-files or fill-volume):

disktester read-files --verify Scratch

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