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