1BLOCKDEV(8)                 System Manager's Manual                BLOCKDEV(8)
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NAME

6       blockdev - call block device ioctls from the command line
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SYNOPSIS

9       blockdev [options] commands devices
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DESCRIPTION

12       The  utility  blockdev  allows one to call block device ioctls from the
13       command line.
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OPTIONS

16       -V     Print version and exit.
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18       -q     Be quiet.
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20       -v     Be verbose.
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COMMANDS

23       --setro
24              Set read-only.
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26       --setrw
27              Set read-write.
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29       --getro
30              Get read-only. Print 1 if the device is read-only, 0 otherwise.
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32       --getss
33              Print sectorsize in bytes - usually 512.
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35       --getsize
36              Print device capacity (in 512-byte sectors).
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38       --setra N
39              Set readahead to N 512-byte sectors.
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41       --getra
42              Print readahead (in 512-byte sectors).
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44       --flushbufs
45              Flush buffers.
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47       --rereadpt
48              Reread partition table.
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52                                   May 2000                        BLOCKDEV(8)