Disk caching is a property on the drive - details will vary by OS.  In Windows 10, right click
on the drive, choose "Properties".  In the dialog, go to the Hardware tab and click the "Properties"
button.  In that dialog, on the General tab, click the "Change settings" button.  Go to the
Policies tab.  Uncheck the "Enable write caching on the device".

OpLocks is disabled in the registry (for Windows).  You'll have to do a search for how to turn
it off for your OS version.

Liz


On 10 Mar 2023 12:17, LindaBye wrote:
> Thanks again for interesting answer.
> 
> Where do you disable oplocks and disk caching?
> 
> Linda
> 
> 
> 
> 
> 
> Den 01.03.2023 02:21, skrev Liz McGuire:
>> I agree with Kevin.  The only thing I would add is to ensure all the networking settings
are correct.  It's been ages since I did Paradox on a network with multiple users...
>>
>> LOCAL SHARE has to be TRUE.  Oplocks (Opportunistic locking) have to be disabled. 
Disk caching should be disabled.
>>
>> Oh, and I wonder if the BDE's 4GB error could be causing this.  I never had to deal
with this so again, I don't remember the details.  I *think* it's a problem when there's an
exact multiple of 4GB of disk space free.  (Or was it 2GB?)  The newsgroups should have lots
of discussion on this issue.
>>
>> Finally, perhaps one of the BDE file limits?  MAXFILEHANDLES might need to increase? 
(I have a doc from Mike Irwin recommending 150.  I'd probably set it to the max - 255.)
>>
>> FWIW, here are the BDE settings I always use:
>>
>> Configuration > System > INIT
>>
>> RAM AMT. (MB)    256+      128
>> ==============================
>> LOCAL SHARE      TRUE     TRUE  *******VITAL
>> MAXBUFSIZE =    65536    32768
>> MEMSIZE    =      180       84
>> MINBUFSIZE =     4096     4096
>> SHAREDMEMSIZE = 61440    28672
>>
>>
>> Configuration > Drivers > Native > PARADOX
>>
>> BLOCK SIZE = 16384 (drop-down list)
>> LEVEL = 7
>> STRICTINTEGRITY = TRUE
>>
>>
>> Configuration > System > Formats > Date
>> All which are True/False should be TRUE
>> MODE = 0
>> SEPARATOR = /
>>
>> Liz
>>