Informix and EMC

Anybody seen or done any comparisons with raw vs. cooked files on an EMC? Even though EMC caches much in memory, and uses the network (from the UNIX boxes' perspective) not the UNIX i/o subsystem, it would still seem to me that the efforts Informix has put into refining i/o to an raw devices would yield better performance on an EMC raw device vs. a EMC cooked device? Any tech or white paper would be especially helpful. Thanx, Bryan

No papers I'm afriad, Bryan, but I've worked in two sites (one Solaris, one HP-UX) and raw is invariably faster. Thinking about it, i'm not all that sure why the disks themselves would make any difference - surely it's what goes on before and after in the OS? The disk access times themselves will be independent of the type of i/o. Neil Bryan Osborne wrote in message <9Brz4.43$h4.526628@WCG-Reader3>... >Anybody seen or done any comparisons with raw vs. cooked files on an EMC? > >Even though EMC caches much in memory, and uses the network (from the UNIX >boxes' perspective) not the UNIX i/o subsystem, it would still seem to me >that the efforts Informix has put into refining i/o to an raw devices would >yield better performance on an EMC raw device vs. a EMC cooked device? > >Any tech or white paper would be especially helpful. > >Thanx, > >Bryan > > >