Created
September 3, 2021 13:20
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test against fake flash
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| #!/usr/bin/env zsh | |
| if test $# -ne 1; then | |
| echo "Tests against fake capacity flash storage. Script should print two identical checksums." | |
| echo "Usage: $0 /dev/sdX" >&2 | |
| exit 1 | |
| fi | |
| parallel --version >/dev/null 2>&1 || exit 1 | |
| hexdump --version >/dev/null 2>&1 || exit 1 | |
| xxh64sum --version >/dev/null 2>&1 || exit 1 | |
| KNAME=$(realpath $1 | rev | cut -d/ -f1 | rev) | |
| cat /sys/block/$KNAME/size >/dev/null || exit 1 | |
| SIZE=$(cat /sys/block/$KNAME/size) | |
| if test ! -w /dev/$KNAME; then | |
| echo "Device $KNAME not writeable. Are you root?" >&2 | |
| exit 1 | |
| fi | |
| echo "Testing device $KNAME, $SIZE sectors." | |
| echo "Will irreparably remove all the data from the device! Hit Control-C in the next ten seconds to abort the operation." | |
| for x in {10..1}; do | |
| echo -n "$x... " | |
| sleep 1 | |
| done | |
| echo | |
| fastrand() { | |
| parallel -q --ungroup -n1 -j2 sh -c 'openssl enc -aes-128-ctr -K '{}' -iv 00000000000000000000000000000000 < /dev/zero' ::: $(hexdump -n 16 -e '8/1 "%02x"' /dev/urandom) $(hexdump -n 16 -e '8/1 "%02x"' /dev/urandom) 2>/dev/null | |
| } | |
| fastrand | head -c$(( 512*$SIZE )) | tee >(xxh64sum) | dd of=/dev/$KNAME bs=4M iflag=fullblock oflag=direct status=progress | |
| dd if=/dev/$KNAME bs=4M iflag=direct status=progress | xxh64sum | |
| echo "If the two checksums match, your drive is OK." |
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