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1995-07-10
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223 lines
<<< WELCOME TO AFS >>>
Using the Ami-FileSafe on your harddisk
=======================================
Features of Ami-FileSafe
------------------------
- AFS has much faster disk access than FFS.
- AFS will store (On average) more data than FFS on the same disk.
- AFS gives vastly improved directory scanning.
- AFS is SAFE - If you crash your machine whilst writing Ami-FileSafe
partitions will not (unlike OFS & FFS) become invalidated
or corrupt.
Restrictions and requirements
-----------------------------
The demonstration version of Ami-FileSafe will not handle partitions of
more than 10MB. It can be installed and automouted in the RidgidBootBlock.
Standard mountlists are also supported. Autobooting is supported. Memory
usage depends on the number of buffers selected.
The full version of Ami-FileSafe is available from Fourth Level
Developments priced £69.95.
The full version of Ami-File Safe also:
- Supports partitions of upto 2GB.
- Is supported by a new Vesion of DiskSalv (By Dave Haynie) (Out soon)
- Supports floppy disks.
- Supports MultiUser File System.
- Comes boxed with a full printed manual including instructions on how to
use its most advanced features.
There is an order form at the end of this file.
Preparing installation
----------------------
Select or make a suitable partition. All the data in the selected
partition will be destroyed when installing Ami-FileSafe, so make sure you
make a backup. Ami-FileSafe must be installed in the l: directory. You
can do this by double clicking on the Install or Install020 (For 68020+
machines) icon.
Installing Ami-FileSafe on the partition
----------------------------------------
Now you can install Ami-FileSafe on the RidgidDiskBlock. You can use
Commodore's HDToolbox, which is supplied with the Workbench software, for
this purpose. With the same tool you can install AFS on a partition. We
assume here that you will use HDToolbox. If you use another tool you
should refer to its documentation.
Select 'advanced options' in the the partitioning window. A number of
extra buttons appear. Click on 'add/update...' and then click 'Add New
File System...'. Type in 'L:Ami-FileSafe' for the name of the file system.
Set the dostype field to '0x41465301' and then select ok. Go back to
the partitioning window, select the desired partition and select the
'change...' button. Select the just added Ami-FileSafe (AFS\1). Use all
the default options: automount on, block size 512, 2 reservered blocks.
If you are using an older version of HDToolBox and the is not a
'change' button then click on 'Custom File System' and then type
'0x41465301' into the dostype field.
Change the 'buffers' field to a value between 50-200 depending on how
much memory you have free (1 Buffer = 1K).
Now select ok and the partioning menu will appear again. Fill in the
name you want the device to have in the 'Partition Device Name' field, e.g.
'DH1'. If you want to boot from the disk you have to set the the bootable
flag. Go back to the main screen and save the changes.
Ami-FileSafe should be installed on the partition now. Reboot and
format the partition from workbench. If you have done something wrong then
go back and start again.
Differences with FFS/OFS
------------------------
When you use the c:list command the 'blocks used' information will be
too high. The list command assumes every file consumes a block of free
space to use as headerblock. AFS uses blocks much more efficiently.
Usually the real number of blocks used is the given amount minus the number
of files listed. You can check this with the "info" command, which will
report the correct amount.
Directory tools like Directory Opus have the same problem with their
spaceleft figure during a copy session. You'll notice that after copying
is finished the figure will go up to the correct figure.
This means that an AFS disk stores more data than an FFS disk.
Ami-FileSafe uses a larger proportion of blocks for data storage.
There is a feature of AFS which tells programs asking the filesystem
information about a Ami-FileSafe disk that it is an FFS disk. This is done
to prevent those programs from saying it's not a dos disk without giving
the information requested to the user (e.g. the "info" command).
AmigaDos compatibility
----------------------
All Amiga-Dos features are implemented and you shouldn't have any
problems with OS-Legal programs. Some programs such as games and disk
utilities which are not OS-legal will not work with Ami-FileSafe.
N.B. If you use Directory Opus then we suggest you disable the progress
indicator to speed up file operations.
Benchmarks
----------
Test FFS AFS Units
DirScan 409 1780 Files/Second
Create 227 1073 K/Second
Read 244 1363 K/Second
The DirScan, Create and Read tests were done with DiskSpeed V4.2
SeekTest (x100) 53.6 4.4 Seconds
SeekTest was done using a custom program (Source code available on request).
It performs the following sequence:
Seek Start of file
Write 4 Bytes
Seek to End of file
Write 4 Bytes
Repeat
Reviews
-------
A review of Ami-FileSafe is available from Aminet and
comp.sys.amiga.reviews. If you would like this review send to you then
please ask.
Contacts
--------
If you are having problems with Ami-FileSafe or would like some more
information then please contact Fourth Level Developments not Amiga
Shopper.
Tel: 0117 985 4455 (6 Lines)
Fax: 0117 955 9157
Email: support@flevel.demon.co.uk
Mail: Fourth Level Developments
31, Ashley Hill
Montpelier
Bristol
BS6 5JA
----------------------------------------------------------------------------
Ami-File Safe Order Form
========================
Please rush me ____ copies of Ami-FileSafe V2.01
[ ] I wish to buy Ami-FileSafe at the full price of 69.75UKP
[ ] I wish to buy Ami-FileSafe at the PFS registered users price of 35.00UKP
Amount £______ (Please add 2.50UKP for P&P).
Name _________________________________________
Address _____________________________________________________________
_____________________________________________________________
Tel ________________
Fax ________________
Email ________________
[ ] I enclose a cheque for the full amount.
Cheques payable to Fourth Level Developments.
[ ] I enclose a EuroCheque for the full amount.
[ ] I enclose UKP (in cash) for the full amount.
[ ] Please send details of how to use the email support system.
Signed ________________________
--------------------------------------------------------------------------