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kana/ramdisk.sh

Created April 26, 2024 04:43
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Create a RAM disk on macOS.
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ramdisk.sh
#!/bin/bash
set -euxo pipefail
MB=100
NUMSECTORS=$((MB * 1024 * 1024 / 512)) # A sector is 512 bytes.
# "hdiutil attach" outputs extra spaces/tabs. They must be removed.
MYDEV="$(hdiutil attach -nomount "ram://$NUMSECTORS" | sed 's/[ \t]*$//')"
diskutil eraseVolume APFS "ramdisk-${MB}mb" "$MYDEV"
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