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What file system type are you using? If it is FAT (w95,3.x,dos) I would not
compress your drive. FAT stores data in segments called sectors. If one
sector goes bad it is not a big deal. Data is moved to a new sector
(usually) and your computer knows not to use the bad sector. The only
problem is if the sector size is 16kb and you have a 1kb file you lose a
little space. FAT compression :) as far as I know makes your whole hdd one
sector by taking out all the space lost in each sector. Then files are
crossed linked and if you lose one crosslink your whole hdd is wiped. I
have played around with this a lot. As a trader, it is much easier and
cheaper to buy a new hdd and keep going.
If the file system you are using is NTFS (WinNT), that is another story.
With NTFS you can add a new HDD and make NT see it as part of your original
drive. Also compression with NTFS is much safer. NTFS has many more
security checks then FAT. Do not get me wrong, NTFS also can have problems.
Hope this helps
Jim Lovejoy
fastgroup@xxxxxxxxxx
People are like electrons... They always want to exist in
their lowest energy state
-----Original Message-----
From: SPDC1@xxxxxxx <SPDC1@xxxxxxx>
To: omega-list@xxxxxxxxxx <omega-list@xxxxxxxxxx>
Date: Friday, May 29, 1998 12:43 AM
Subject: 40bonn.dat file of 200meg too big?
>Hello,
>Help!!! I am running out of HD space and don't want to make hardware
changes
>at this time. I have 197 meg of data in the 40bonn.dat file, in a 1.2 gig
HD
>(partitioned to 600 meg in C and 600 meg in D). I would prefer to not
>repartition my hard drive at this time , either. The C has been trimmed
down
>to the essentials and I have only 29 megs left on C drive. D drive has 400
>megs of space but I can't run Omega if I transfer the Omega directory to D
>drive, or at least I wasn't able to when I tried to point and drag the 300
or
>so megs of Omega directory from C to D.
>I have almost 3 years of tick data from the CME and CBOT, and have multiple
>symbols I follow. I collected the first two years of data, real time from
>Signal and then from Bonneville (BMI). The last year I have been
downloading
>tick data in the Bonneville format from www.omegaresearch.com. I want to
have
>access to old data on the symbols I follow, but I know there is more data
on
>the symbols I don't follow ( or is the data for symbols you don't have in
your
>server just dumped ). Is there a way to separate the data on symbols I use,
>and dump or store the rest of data, thereby opening up some space on my
>overstressed C drive. Also is there a way I could separate old contracts on
>the symbols I follow and still have access to it. That would accomplish
what I
>want ( decreasing 40 bonn.dat file size and thus increasing available C
drive
>space ).
>I am sure you can tell from my post that I am computer and Trade Station
>illiterate, but I have learned enough for it to serve my purposes ( up til
now
>) . My trading is uncomplicated and using TS is a like using a Viper to
drive
>to the store, only a block away. It will get you there, but there will be
tons
>of unused potential on tap. Any advise will be greatly appreciated.
>Thanks,
>Roy
>
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