korn@cory.Berkeley.EDU.UUCP (11/22/86)
I just got my XP upgrade yesterday (came on the first shipment of 'em
to that store), and installed later that night. The upgrade consists
of a new PROM chip inside the DataFrame, and a new initializer program.
The new PROM necessitates reformatting of the drive--you cannot
get just part of the speed increase by putting in the chip but not
the reformat.
However, you will see a slight increase in speed by just installing
the new "drivers" using the initializer 2.1 (to be found in the
~/pub/mac directory of ucbvax.berkeley.edu's public ftp). The
timings I got using DiskTimer (the older version) were as follows:
Initializer 1.5 2.1 drivers 2.1 initialized full XP
~29.x read/write ~27.x r/w ~21.x r/w 15/14.9 r/w
So, as SuperMac claims, the XP gives about a 100% speed increase, given
32K blocks per read/write. But, it's worthwhile noting, for folks who
have better uses for their $80-$100 than an XP upgrade, you can get
a ~30% increase JUST FROM THE NEW INITIALIZER.
With all of my SuperMac/Dataframe related postings, I believe it's time I
made something clear...
DISCLAIMER: I neither work for SuperMac, nor do I directly benefit from
the sale of any SuperMac products. I'm merely a very satisfied customer,
and a non-commission salesperson who has been very happy recommending
this drive to my customers.
Peter
-----
Peter "Arrgh" Korn I know lots of honorary jews! Why,
korn@ucbvax.Berkeley.EDU some of my very best friends
{decvax,dual,hplabs,sdcsvax,ulysses}!ucbvax!korn are honorary jews!rcopm@yabbie.rmit.oz (Paul Menon) (11/25/86)
In article <1091@zen.BERKELEY.EDU>, korn@cory.Berkeley.EDU (Peter "Arrgh" Korn) writes: > ...the new "drivers" using the initializer 2.1 (to be found in the > ~/pub/mac directory of ucbvax.berkeley.edu's public ftp). The > timings I got using DiskTimer (the older version) were as follows: > > Initializer 1.5 2.1 drivers 2.1 initialized full XP > > ~29.x read/write ~27.x r/w ~21.x r/w 15/14.9 r/w > > So, as SuperMac claims, the XP gives about a 100% speed increase, given > 32K blocks per read/write... Errr, a 100% speed increase means doing something in no time flat! Now, we have a couple of DF's down under here, can we get the same improvement? (Perhaps the coriolis force would prevent this from happening) Keep Shmiling Paul Menon. Dept of Communication & Electronic Engineering, Royal Melbourne Institute of Technology, 124 Latrobe St, Melbourne, 3000, Australia ACSnet: rcopm@yabbie UUCP: ...!seismo!munnari!yabbie.rmit.oz!rcopm CSNET: rcopm@yabbie.rmit.oz ARPA: rcopm%yabbie.rmit.oz@seismo BITNET: rcopm%yabbie.rmit.oz@CSNET-RELAY PHONE: +61 3 660 2619.