EWF RAM Question

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G

Guest

Using a EWF Ram Partition when I execute EWFMgr.Exe

The EWF % full shows extrange charaters:

-> Ewf Volume percent full -1.#J

What does "-1.#J" mean?
 
GL,

That is a known EWF issue (probably wrong string formatting). You may safely ignore that.
 
GL,

Since you use RAM there is 0 byte disk overlay usage.

You can use "ewfmgr C:" to see overlay memory usage and that is it. If you or EWF fill all your memory then your OS is doomed.

Regards,
Slobodan
 
OK; That's right. I got confused Thanks

I have 2 extra question related to a RAM Ewf partition

1) if I create a file to save data into my RAM EWF partition ( temporary of
course because at next boot up will disapear). But if my "temporary file" (
let's say) is same size always ( actually I just update some Text but they
use the same size always); If I update that file a 1,000 times the EWF Ram
usage will increase every write to that file or It will spend only total data
file size?.

2) The EWF RAM size requiered to be filled out in the target designer is
a) my total phisical RAM or
b) the ram I would like to be used as EWF?.

if the answer is b). That means that the WinXp + my application Ram usage
can not share the Ram assigned to EWF? Or how this works?

Thanks Again
 
GL,

1) EWF is a filter to disk driver. It doesn't know anything about files (FS used).
Basically if you preallocate a fixed number of blocks and don't allow to extend it, your EWF usage won't grow beyond the allocated
size.
If you create a file (do not delete/create it again) and file pointer is always within the inial file size, FS usually do not use
blocks outside of the pre-allocated.
It certainly depends on the FS implementation, but for FAT and NTFS this scenerio is usualy true. For some flash wear-out saving
OSes, it wouldn't be true - they will try to not write to the same block twice if possible and therefore EWF usage will always grow.

2) The EWF Partition size mentioned on the EWF component settings page is related to the EWF COnfig Volume size.
As you can imagine, it doesn't make sense for EWF RAM Reg mode.
For EWF RAM the size will be constant (32K/64K) and EWF Volume will contain the persistent config structure about protected
partitions, EWF states on each protected volume, EWF boot commands, etc.
For EWF Disk the size of EWF Volume is really a limit to how big the EWF Disk overlay can grow. The EWF volume size here should be
large enough to accommodate the total size of all protected volumes in the system.
 
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