NAME¶

sg_read_block_limits - send SCSI READ BLOCK LIMITS command

SYNOPSIS¶

sg_read_block_limits [--help] [--hex] [--mloi] [--raw] [--readonly] [--verbose] [--version] DEVICE

DESCRIPTION¶

Send a SCSI READ BLOCK LIMITS command to DEVICE and outputs the response. This command is defined for tape (drives) and its description is found in the SSC documents at https://www.t10.org .

OPTIONS¶

Arguments to long options are mandatory for short options as well.

-h, --help

output the usage message then exit.

-H, --hex

output response in hex (rather than decode it).

-m, --mloi

sets the MLOI bit in the READ BLOCK LIMITS command and if that succeeds, prints out the Maximum Logical Object Identifier (MLOI) value. The MLOI bit was introduced in the ssc4r02.pdf draft.

-r, --raw

output response in binary to stdout.

-R, --readonly

open DEVICE in read-only mode. The default is to open it in read-write mode.

-v, --verbose

increase the level of verbosity, (i.e. debug output).

-V, --version

print the version string and then exit.

EXIT STATUS¶

The exit status of sg_read_block_limits is 0 when it is successful. Otherwise see the sg3_utils(8) man page.

EXAMPLES¶

It is usually okay to use no options. Here is an invocation (on the first line following the "#" command prompt) followed by some typical output:

# sg_read_block_limits /dev/st0
Read Block Limits results:
Minimum block size: 1 byte(s)
Maximum block size: 16777215 byte(s), 16383 KB, 15 MB
Granularity: 0

AUTHORS¶

Written by Douglas Gilbert.

REPORTING BUGS¶

Report bugs to <dgilbert at interlog dot com>.

COPYRIGHT¶

Copyright © 2009-2022 Douglas Gilbert
This software is distributed under a BSD-2-Clause license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO¶

sg3_utils(sg3_utils)