> also, IX/370, is not an exact port of Sys VR2. the blocksize used > for I/O is 4K. this means much better typical I/O performance > when compared to 1K blocks. Actually, AT&T's own S/3[67]0 S5R2 UNIX uses 4K blocks also (lots of S5 code has #ifdefs for "ibm" or somesuch that set block sizes to 4K). Guy Harris {seismo,ihnp4,allegra}!rlgvax!guy