What block sizes does PFS-2 support ?
PFS, AFS and PFS2 are supposed to support 512 and 1024 byte blocks. Unfortunately a number of serious bugs prevent 1024 byte blocks from working. These bugs will be fixed in 4.3.
So you think you have block sizes of greater than 512 bytes working ? Well you haven't. It cannot work.
SCSI Disks can usually be low-level formatted in a number of different block sizes. HDToolBox does not allow a block size to be specified. HDInstTools, available from AmiNet, does allow the block size to be specified.
When the disk has been formatted it has to be partitioned. In the advanced mode of the partition screen HDToolBox appears to let you define the block size. This is not so. The block size specified should be the same as that used during low-level formatting. The value of this field is ignored by all filesystems as its value is assumed.
Some devices, MO for example, are supposed to be 2048 byte blocks and they are. The drive itself allows the system to use 512 byte blocks as this is what most computers today expect. 4 of what the computer calls blocks are packed into a single physical block. All without your knowledge.
GREED have informed me that there are users using 2048 and 4096 block sizes with no problems although these users are NOT officially supported. Which is a shame as it doesn't work ! My guess is that they have set the large block size in the partition screen of HDToolBox. PFS2 ignores this field and uses the block size that the device was low-level formatted in. Almost certainly 512. No other value works !