patch-pre2.0.6 linux/Documentation/filesystems/affs.txt

• Lines: 93
• Date: Sun May 19 15:22:19 1996
• Orig file: pre2.0.5/linux/Documentation/filesystems/affs.txt
• Orig date: Sat May 11 10:42:04 1996

diff -u --recursive --new-file pre2.0.5/linux/Documentation/filesystems/affs.txt linux/Documentation/filesystems/affs.txt
@@ -6,14 +6,12 @@
 
 DOS\0		The old or original filesystem, not really suited for
 		hard disks and normally not used on them, either.
-		Not supported.
 
 DOS\1		The original Fast File System. Supported.
 
 DOS\2		The old "international" filesystem. International means that
 		a bug has been fixed so that accented ("international") letters
 		in file names are case-insensitive, as they ought to be.
-		Not supported.
 
 DOS\3		The "international" Fast File System.  Supported.
 
@@ -29,7 +27,10 @@
 speed up almost everything with the expense of wasted disk space. The speed
 gain above 4K seems not really worth the price, so you don't lose too
 much here, either.
-  
+
+The muFS (multi user File System) equivalents of the above file systems
+are supported, too.
+
 Mount options for the AFFS
 ==========================
 
@@ -68,6 +69,9 @@
 quiet		The file system will not return an error for disallowed
 		mode changes.
 
+verbose		The volume name, file system type and block size will
+		be written to the syslog.
+
 Handling of the Users/Groups and protection flags
 =================================================
 
@@ -104,22 +108,47 @@
     
 Newly created files and directories will get the user and group id
 of the current user and a mode according to the umask.
-Linux can read, but not write, Amiga FFS partitions.
-
-Mount options are
-    size	has the size in 512 byte blocks of the mounted medium. 
-
-Case is significant in filename matching, different to real AFFS.
-
 
 Command line example
+====================
     mount  Archive/Amiga/Workbench3.1.adf /mnt -t affs -o loop,size=1760
     mount  /dev/sda3 /Amiga -t affs
 
 /etc/fstab example
     /dev/sdb5	/d/f    affs    ro
 
-This file system will probably be writeable in future releases.
+Bugs, Restrictions, Caveats
+===========================
+
+Quite a few things may not work as advertised. Not everything is
+tested, though several hundred MB have been read and written using
+this fs.
+
+Filenames are truncated to 30 characters without warning.
+
+Currently there are no checks against invalid characters (':')
+in filenames.
+
+Case is ignored by the affs in filename matching, but Linux shells
+do care about the case. Example (with /mnt being an affs mounted fs):
+    rm /mnt/WRONGCASE
+will remove /mnt/wrongcase, but
+    rm /mnt/WR*
+will not since the names are matched by the shell.
+
+The block allocation is designed for hard disk partitions. If more
+than 1 process writes to a (small) diskette, the blocks are allocated
+in an ugly way (but the real AFFS doesn't do much better). This
+is also true when space gets tight.
+
+The bitmap valid flag in the root block may not be accurate when the
+system crashes while an affs partition is mounted. There's currently
+no way to fix this without an Amiga (disk validator) or manually
+(who would do this?). Maybe later.
+
+A fsck.affs and mkfs.affs will probably be available in the future.
+Until then, you should do
+    ln -s /bin/true /etc/fs/mkfs.affs
 
 It's not possible to read floppy disks with a normal PC or workstation
 due to an incompatibility to the Amiga floppy controller.