DOS ain't dead - DOS copy command

DOS copy command (Developers)

posted by Rugxulo , Usono, 28.09.2010, 22:40

> EDIT: Also here's some stuff Eric sent us per mail for whatever reason:

Here's some more, for completeness:

> On one hand, FreeDOS
> does not implement secondary caches in the kernel. On the other
> hand, you can use TICKLE together with LBACACHE for readahead...
>
> Make sure to read the docs or at least /? screens to use options
> properly, you have to enable e.g. lba harddisk readahead manually.
>
> I think the cache by Jack also had something with readahead? And
> of course it is quite possible that your disk has it built in so
> you only have to wait for the piece by piece transfer while the
> disk already buffered larger chunks in the RAM inside the drive.
>
> Of course it is faster to do a real readahead. You could even set
> the "cooling" temperature mode of LBACACHE, do a dir /s or do e.g.
> chkdsk or dosfsck, and then switch back to normal temperature, to
> force the FAT and DIR data into the cache before copying.
>
> Anyway... My theory is still that seeks and small writes to the
> FAT are what makes copying slower, so tweaking read speed or the
> speed of file content read / write may have only small effects.
>
> As usual, you can try whether a write pooling or delayed write
> cache helps you, for example the NWCACHE from DRDOS... You can
> probably find some suggested command line options for that in
> your mail archives and the freedos mailing list archives... ;-)

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Complete thread:

DOS copy command - georgpotthast, 26.09.2010, 21:37 (Developers)
- DOS copy command - ecm, 26.09.2010, 23:46
- DOS copy command - Japheth, 27.09.2010, 02:06
- DOS copy command - georgpotthast, 27.09.2010, 21:28
  - DOS copy command - ecm, 27.09.2010, 21:40
    - DOS copy command - georgpotthast, 27.09.2010, 22:46
      - DOS copy command - bretjohn, 28.09.2010, 00:15
        DOS copy command - ecm, 28.09.2010, 01:16
        DOS copy command - Rugxulo, 28.09.2010, 05:37
        DOS copy command - Rugxulo, 28.09.2010, 22:40
        DOS copy command - Rugxulo, 30.09.2010, 06:51
        DOS copy command - georgpotthast, 30.09.2010, 19:59
        DOS copy command - tom, 01.10.2010, 15:12
        DOS copy command - georgpotthast, 02.10.2010, 22:56
        DOS copy command - RayeR, 08.10.2010, 10:10
        DOS copy command - nidud, 03.10.2010, 17:17
        DOS copy command - georgpotthast, 28.09.2010, 21:04
        DOS copy command - ecm, 29.09.2010, 14:05
- DOS copy command | FATPLUS.EXE - DOS386, 13.10.2010, 04:02