mobo@sphinx.UUCP (10/03/87)
Disk Interleave testamonial:
Thanks to several people who have posted or mailed advice about
resetting the disk interleave on my 6300(V30) ST225 combination.
(especially Dave Braune and Bill Mayhew). I really appreciated
Dave's data on disk timings in comp.sys.att. His article
convinced me to go ahead and try some new interleave factors in
the hopes of speeding up my hard disk. The results were amazing.
The combination ST225 disk and Everex (looks like a WD WX2 to me)
came with a low-level format program with a default interleave
factor of 5. I changed this to 6, and the disk seems to have
speeded up by an extraordinary factor.
At I=5, CORETST estimated the data transfer rate at 25.4 KB/sec.
I=6 . . . . . . . . 81.6 KB/sec.
I=5 Coretst track to track seek = 21.3 ms
I=6 . . . . . = 11.3 ms
Here's an amazing one:
R.Steincross' HD.com P/D disk performance test took 5 minutes and
4 seconds to read 300 tracks at I=5.
At I=6 it took 1 minute 39 seconds (304% improvement).
The difference in loading programs, etc. is remarkable. I
entered this project rather ambivalently, thinking that the
results wouldn't be worth the effort expended. *Wrong*.
Samuel Wilson ..ihnp4!gargoyle!sphinx!mobo
FOTMOBO@UCHMVS1.Bitnet
University of Chicago, Division of Social Sciences