This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
Yes; you can change the counter in the string comparison routine that checks for the "Apple_Driver" partition type string so that it only checks the first 12 characters. This counter is at byte $3574 in the System 6.0.1 SCSIHD.DRIVER file and is originally $1F. Change this to $0B and the driver will then ignore "Apple_Driver43" partitions. If you make this or any other patch to the driver, I also you recommend you bump up the version number. Change byte $01FF from $10 to $2E (for version 6.02 experimental). By: Harold Hislop