PFS3 block size

[Thomas]

A CRC-enabled device calculates a short, fixed-length binary sequence, known as the CRC code or just CRC, for each block of data and sends or stores them both together.

I submit that less blocks (transferred disk sectors) => less CRC checking, unless I am misunderstanding something here.

A CRC-enabled device always calculates a checksum for its physical blocks. It does not know about logical clusters and therefore it does not make a difference if larger clusters are used. Unfortunately the word "block" is used with many different meanings. Physical device block size (e.g. 512 bytes or 4k) is always fixed for SCSI or ATA devices. File system block size (a.k.a. cluster size) can be varied by software, but it depends on the file system implementation whether larger clusters improve performance or not.

[Thomas]

You don't need to reinstall. Just backup (for example copy all files to another partition), change file system, quick format and restore the backup.

[Thomas]

Someone mentioned in another thread that you need the RDB to contain the "driver" (or whatever it is) in order to boot from the disk too.

That's not specific to the boot partition. Prior to be able to use the file system on any partition, it needs to be added to the RDB.