new FFS?
12 messages in this thread
I was told that the new 3.0 OS has a different file system, that uses a
`directory caching' method. Is this true? Is it compatible with any of
the old file systems? How much faster is this than the FFS used with
2.04? Is htis a bunch of bull I heard and nothing has changed?
From what I have gathered here (CI$) is the only diffs in 3.x and 2.x
is the datatypes modules and the AGA specific stuff, is this another
feature that all us nonAGA users should clamour to C=, to release 3.x for
the rest of us? As you can see I am full of ??? and really would like to
know what differences there are between 2.x and 3.x.
…Steve
====>>> Motorola 68030 Inside <<<====
SS: I was told that the new 3.0 OS has a different file system, that uses
a `directory caching' method. Is this true?
With AmigaDOS 3.0, there are SIX file systems:
OFS – Old File System, or Original File System
FFS – Fast File System
IM/OFS – International Mode/ added to OFS
IM/FFS – International Mode/ added to FFS
DC/OFS – Directory Cache/ added to OFS
DC/FFS – Directory Cache/ added to FFS
The OFS is the default under all versions of AmigaDOS. The FFS gives more
disk space by not including extra data using to re-build crashed disks,
and more speed since the extra data does not have to be stripped during
loading.
International mode (available with 2.1), corrects a case-sensitivity
problem with international characters. (Both FFS & IM options can be
mixed, but IM can't be used with an AmigaDOS older than 2.0.)
Directory cache, is for floppy drives. This file system maintains a cache
of the directory for improved speed in finding, listing, and loading. but
at a cost to creating and writing the files. (Slows down harddrives.)
I'm not sure if you could have a IM+DC/xFS disk.
Ron.
– ap'ing with AP. (Eagles may fly, but weasles aren't sucked
into jet engines.)
Ronald,
Thanx for the reply! so what you are saying is the new DC/xFS is not
usefull with hard drives? hmmm Doesn't make much sense but is not the
1st time for C= ! Why couldn't they (C=) impement something like this for
hard drives? The post I got the info from, seemed to say that there was a
50-75% increase in HD speed with the use of the new DC/xFS. Oh well again
thanx for enlightening me on this bit of info.
…Steve
====>>> Motorola 68030 Inside <<<====
You can use DC/xFS on a hard drive, but you wouldn't want to. It would
slow your hard drive down (many more seeks on writes!) DC only speed ups
reads on the directory of the disk. Not to mention, it makes the disk
structure a bit more vulnerable, (what if you got a read error on the
first driectory track? Answer, an extreme pain in recovering any files)
With our present FFS, it's easy to recover most of the files.
Bob Comer
I could be wrong, but the main feature of DC/xFS is that it creates a
cache (buffer) for the directory.
This increases reading of the directory, and accessing of the directory,
BUT every time a file is created, deleted, altered, or moved — the DC has
to be updated. With floppies there are only so many files normally found
on a disk.
A DC/xFS may give increased speed in reading, and loading from a HD, but
the moment you edit, copy, move, delete, create a file it there is
overhead added to update the DC, with thousands of possible files this
overhead can start getting quite long.
The DC/xFS gives speed in one direction, but takes speed in the another.
Ron.
– ap'ing with AP. (Eagles may fly, but weasles aren't sucked
into jet engines.)
Ronald,
Sound like C= is just tryiong to confound everyone with a little needed
feature that will confuse more than help.
…Steve
====>>> Motorola 68030 Inside <<<====
SS: Sound like C= is just tryiong to confound everyone with a little
SS: needed feature that will confuse more than help.
The DC/xFS or IM/xFS formating?
With the new Locale option, the improved support of Internation characters
in file names (IM/xFS), will help.
The DC/xFS is another question. I wonder if it improves speed of the HiD
floppy drives.
Ron.
– ap'ing with AP. (Eagles may fly, but weasles aren't sucked
into jet engines.)
Ron,
how do you specify the international mode ? I just upgraded to 2.1, but is
still having the case problem.
Regards, J0RGEN ….from DENMARK
JT: how do you specify the international mode ? I just upgraded to 2.1,
but is still having the case problem.
The disks need to be formated using the 2.1 Format command.
Insert a disk, click on it's icon, and select FORMAT from the WB. A GUI
based format window should open, with the name of the disk, and list
options for:
TRASHCAN,
FastFileSystem, and
International Mode
A box will be next to each option, if the option is selected, a check will
appear in the box. The disk will format with the options you select.
If you format from the CLI place the keyword "international" at the end of
the template you use.
Ron.
– ap'ing with AP. (Eagles may fly, but weasles aren't sucked
into jet engines.)
Thanks,
I hoped for a parameter in the Mountlist.
Regards, J0RGEN ….from DENMARK
You are right that the main part of KS/WB 3.x is the AGA/datatype support.
There are however quite a few neat features, that aren't as obvious such
as:
1. Picture backgrounds on WB. Any IFF/Datatype picture can be used as a
background.
2. Faster intuition
3. Intuition and Graphics.library support for Double buffering.
4. Palette sharing. It will "intelligently" attempt to find the right
colors in a palette. This makes it much easier to have several
applications running on WB. No more unreadable text (if people use the new
functions that is) and other garbled colors just because you have changed
the default colours of WB.
5. Attached screens. eg. A lores HAM paint program running with a small
hires tool screen on top of it. When you drag the main screen down, the
daughter screen (the tool screen) will automatically move down as well.
This solves problems like the CanDo shuffle <g> (If you use CanDo, you
will know what I mean, if not it doesnt matter.).
6. Tablet support
7 Countless other new features.
BTW! I think that Datatypes is worth an upgrade alone.
Pelle Braendgaard
B Squared Multimedia, Cardiff
Pelle,
Sounds neat!! Can't wait! Just hope they hurry and release it for the
rest of us, as upgrading to the 4000 is out of the question at the moment
and the 1200 is not expandable enuf for me (yet).
…Steve
====>>> Motorola 68030 Inside <<<====