176 lines
3.1 KiB
Plaintext
176 lines
3.1 KiB
Plaintext
.TH ATAZZ 8
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.SH NAME
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atazz \- ATA target control
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.SH SYNOPSIS
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.B atazz
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[
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.B -r
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]
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[
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.IR sddev
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]
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.br
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.B atazz
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.B -c
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.I cmd
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.SH DESCRIPTION
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.I Atazz
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is an interactive program for exercising
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raw ATA devices.
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Its intended purpose is to support odd and
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administrative commands without requiring this
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functionality be implemented by each device driver.
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It reads commands from standard input and applies
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them to an ATA target. Communication is in SATA
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FIS format. Non-ATA devices accessed
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through the
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.IR sd (3)
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interface will not work; ATAPI devices will respond
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to the commands in the ACS-2 packet feature set.
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If the
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.B -c
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option is given, the name of the given numeric ATA
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command is printed.
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.I sddev
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is given on the command line, an
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.B open
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(see below)
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is immediately applied to the target.
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On completion of a command, any errors are
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printed followed by the prompt
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.LR "az> " .
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The response FIS may be printed with the
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command
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.BR rfis .
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Some commands like
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.B "identify device"
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print processed output by default. Redirecting the
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output to a file will give the raw output as will the
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.B -r
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flag.
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In addition the following commands are implemented
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internally
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.TF "< > <> file"
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.PD
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.TP
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.BI "< > <> " file
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Redirect output, input or both to or from a file.
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If
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.I file
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is missing, then the redirection is closed.
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.TP
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.B close
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Close the currently open device.
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.TP
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.B dev
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Print device path and basic information.
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.TP
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.BR issuetr " [ \fIcommand\fP ... ]"
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Toggle command issue tracing. With no arguments,
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issuetr toggles tracing for all commands. Commands
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may be specified by number.
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.TP
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.BI open " dev
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Open the named device.
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.B probe
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Print a list of available device paths, size, sector size
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and WWNs. The first column is a suitable argument
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for
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.BR open .
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.TP
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.B rfis
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Print the returned FIS, if any.
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.PP
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For all commands, it is possible to manipulate
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the sata registers directly by specifying the register
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name and an 8-bit value. The registers are
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.TF "features"
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.PD
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.TP
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.B type
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FIS type
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.TP
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.B flags
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FIS flags
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.TP
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.B cmd
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command register
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.TP
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.B feat
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or
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.B features
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.TP
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.B lba0
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or
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.BR sector
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.TP
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.B lba8
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or
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.B cyl0
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.TP
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.B lba16
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or
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.B cyl8
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.TP
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.B lba24
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or
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.B dh
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or
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.B byte8
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.TP
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.B lba32
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.TP
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.B lba40
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.TP
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.B feat8
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.TP
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.B sc
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sector count
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.TP
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.B sc8
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.TP
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.B r
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reserved FIS register
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.PP
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In addition, commands that take an LBA and a number of
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sectors may be given those arguments directly, for example
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to read 1 sector starting at lba 100,
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.EX
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.IP
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az> read dma ext 100 1
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.EE
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.PP
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Subcommands are spelled out as in ACS-2.
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For example, to set the transfer mode to UDMA 6, enable
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the write cache and to enable and report smart status, one would
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.EX
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.IP
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az> set features set transfer mode udma 6
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az> set features enable write cache
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az> smart enable operations
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az> smart return status
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normal
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.EE
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.PP
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SCT pseudo-protocol commands are also supported.
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.EX
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.IP
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az> sct error recovery time set read timer = 5
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az> sct error recovery time return read timer
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500ms
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.EE
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.PP
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.SH FILES
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.BR /dev/sd\fIXX\fP/raw
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.SH SOURCE
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/sys/src/cmd/atazz
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.SH "SEE ALSO"
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.IR scuzz (8),
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.IR sd (3),
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.IR smart (8),
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.br
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T13/2015 ACS-2 published online at http://www.t13.org.
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.SH BUGS
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Subcommand help doesn't work. ACS-2 commands are
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tortuously verbose.
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