ref: 15d1425b276495a82621a8d075176a59a512cdf3
dir: /sys/src/cmd/disk/test/basic.rc/
#!/bin/rc # read fresh disk ../$O.qcowfs -n 4294967296 /tmp/qcow dd -ibs 389120 -skip 1 -obs 8192 -count 1 < /mnt/qcow/data >/dev/null ../$O.qcowfs -n 4294967296 /tmp/qcow dd -ibs 389120 -skip 1 -obs 15473 -count 1 < /mnt/qcow/data >/dev/null # write ../$O.qcowfs -n 4294967296 /tmp/qcow dd -ibs 389120 -skip 1 -obs 8192 -count 1 -if /dev/random -of /mnt/qcow/data # start, power of two dd -ibs 389120 -skip 1 -obs 15473 -count 1 -if /dev/random -of /mnt/qcow/data # random prime dd -ibs 389120 -skip 1 -obs 8192 -seek 524287 -count 1 -if /dev/random -of /mnt/qcow/data # end # read written disk dd -ibs 389120 -skip 1 -obs 8192 -count 1 < /mnt/qcow/data >/dev/null dd -ibs 389120 -skip 1 -obs 15473 -count 1 < /mnt/qcow/data >/dev/null # read and write some data cat /bin/cat > /mnt/qcow/data sz = `{walk -es /bin/cat} xhash=`{cat /bin/cat | sha1sum} rhash=`{read -c $sz /mnt/qcow/data | sha1sum} if(! ~ $xhash $rhash){ >[1=2] echo mismatched data exit mishash } exit ''