usagev2.use

qnx powerpc MPC8245的 BSP源文件

%C	- Fast Flash File System v2 (POSIX compatible)

%C	[-aclrvV] [-b priority] [-f verifylevel] [-i index]
	[-m mountover[,cmpover]] [-p backgroundpercent[,superlimit]]
	[-s baseaddress[,windowsize[,arrayoffset[,arraysize[,unitsize[,buswidth[,interleave]]]]]]]
	[-t threads] [-u updatelevel] [-w buffersize]

Options:

 -a              disable automount partitions
 -c              disable compressed mountpoints
 -E              do not daemonize and exit on EBADFSYS with partition num + 1
 -l              list available flash databases and exit
 -r              enable fault recovery of dangling extents chains, partial
                 reclaims, dirty extent headers and damaged extent pointers
 -v              display verbose info
 -V              display file system and MTD version information
 -b priority     enable background reclaim at priority
                 (low and high are system dependant)
 -f verifylevel  enable flash verify (def.=0, 0=none, write=1, erase=2, all=3) 
 -i arrayindex[,partindex]
                 set first array index and first partition index for multiple
                 drivers (def.=0,0 (for /fs0p0), min=0, max=15)
 -m mountover[,cmpover]
                 override default mountpoints assigned to file systems 
                 formatted with an empty (ie. "") mountpoint, mountover can
                 include two %X format specifiers (as in printf) for the socket
                 index and the partition index respectively, the cmpover can
                 also include two %X format specifiers or one %s to be
                 substitued with the formatted mountover
                 (def.=/fs%Xp%X,%s/.cmp)
 -p backgroundpercent[,superlimit]
                 set parameters like background reclaim percentage trigger
                 for stale space over free space, and superseded extent limit
                 before reclaim (def.=100,16)
 -s baseaddress[,windowsize[,arrayoffset[,arraysize[,unitsize][,buswidth[,interleave]]]]]
                 set socket options (normally base physical address, window
                 size, array offset, array size, unit size, bus width and 
                 inter-leave). But the format is left flexible for socket 
                 services with customized drivers
 -t threads      set number of threads (def.=2, min=1, max=4)
 -u updatelevel  set time Update Level (def.=0, 0=never, 1=file, 2=parent)
 -w buffersize   set append buffer size (def.=512, 0=disable)

Examples:

%C	-c -w0 &

Starts a flash filesystem with compression mountpoint disabled and no append
buffering.

%C	-b5 -u2 -r &

Starts a flash filesystem with background reclaim process enabled and
most posix semantics with an initial fault recovery when automounting.

Mountpoints:

This is for the default mountpoint index...

/fs0p0       structured flash file system mountpoint
/fs0p0/.cmp  transparent decompression read-disable/write-enable mountpoint

/dev/fs0     socket mount mountpoint
/dev/fs0p0   raw partition mountpoint

Notes:

Hard links and access times are not supported with the flash file system.
Symbolic links, modification and change times are supported.