I create text file of 4 bytes in Windows with value of 1234. I compress it with ZIP. The result was zip file with 124 bytes. You can try it.
Shai On Sun, Feb 7, 2010 at 7:52 PM, shai hess <shai.h...@gmail.com> wrote: > > > >>EREP does not recover from I/O errors; in fact, it is not involved in the > >>I/O at all. It simply displays hardware and software data that some other > >>component has asked to record. > > You right, Erep only report. But there are error recovery routine which use > the sense to recover IO error like END-OF_CYL using the sense data track > address. > > About if the support for EAV in my code is totally can not be implemented > as I say before, well there is a way to solve this issue partially. > > If I will recover the IO in my emulation code in PC and avoid any sense > error which I can be recover (END_OF_CYL), without the help of MVS this > might work. > > And if it is a real IO error which will abend the IO, I can send sense > which MVS will not like at all but because I am TCP, I can send my message > with explanation of the error and the real track address which was in error > and can not be recoverable. At lease for cyl 0-0xffff it will be standard > for above it will be in my way. > > Some people find that I am wrong about compression and encryption, OK I am > not expert to compression or encryption but it is not make sense to compress > 4 bytes to 4 bytes. The standard compression will fail to compress the 4 > bytes to 4 bytes and may require more than 4 bytes to acknowledge the > user that the compress work bad and instead of 4 bytes it is now >4 bytes. > > Encryption can be complicate with key or other mean which I am not > familiar, but simple encryption can be to XOR the value with key constant > key value. > Example: if the key is 0xFFFFFFFF then 0x12345678 can be encrypted to > 0xedcba987. That mean 4 bytes to 4 bytes. > > Please let me know if anyone can live with this partial solution. > > Shai > > > Shai > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
