X-Authentication-Warning: delorie.com: mail set sender to djgpp-bounces using -f From: paravashu Newsgroups: comp.os.msdos.djgpp Subject: Re: strange problem with disk operations Date: Mon, 13 Jul 2009 02:07:06 -0700 (PDT) Organization: http://groups.google.com Lines: 70 Message-ID: <369b60ab-72c2-4707-8c13-7b2d6c1be054@l5g2000pra.googlegroups.com> References: <86e53db7-9815-42a4-a7bc-bcf5276da9a4 AT p18g2000pra DOT googlegroups DOT com> <1ZidnRhYjtuDC9rXnZ2dnUVZ_s6dnZ2d AT earthlink DOT com> NNTP-Posting-Host: 210.118.108.254 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: posting.google.com 1247476026 8981 127.0.0.1 (13 Jul 2009 09:07:06 GMT) X-Complaints-To: groups-abuse AT google DOT com NNTP-Posting-Date: Mon, 13 Jul 2009 09:07:06 +0000 (UTC) Complaints-To: groups-abuse AT google DOT com Injection-Info: l5g2000pra.googlegroups.com; posting-host=210.118.108.254; posting-account=nZZF7goAAAABsnWP2j-BAdZkVZvGqieS User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727),gzip(gfe),gzip(gfe) To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com On Jun 28, 9:10=A0pm, "Charles Sandmann" wrote: > "paravashu" wrote in message > > news:86e53db7-9815-42a4-a7bc-bcf5276da9a4 AT p18g2000pra DOT googlegroups DOT com... > > >i m facing a strange problem with disk reads and writes through > > __dpmi_int API. > > I am trying to perform DISK reads/writes from USB (which is also a dos > > bootable). but the programs always hangs at a particular LBA value. > > very wierd behaviour..some times load error..comes...some other times > > no swap file error comes... some times crashes...:-) > > Assuming you are using CWSDPMI. =A0Hangs and strange behavior can > come from over running the 16-bit internal stack. =A0Some bad Int 13 > providers have been demonstrated to have excessive stack usage. > Seehttp://clio.rice.edu/djgpp/r5bug01.txtfor an example. =A0This might > explain why it works on one machine, but not another. > > One way to analyze this is usinghttp://clio.rice.edu/djgpp/bigstack.zipor= http://clio.rice.edu/djgpp/stacksiz.zipto see if stack overrun is the > problem. > > > But with the same setup , ghost works perfectly witout any error. > > Depending on which version of Ghost is used, and if it uses int 13, > that might not be important. > > > the same setup n environment on a different machine works perfectly > > without any error with our application. > > That points to something machine specific. =A0Is the USB device the > same? =A0If so, that points to the machine BIOS, memory size, or > memory layout. > > > The problem is obvserved when we run the application from USB. please > > clarify as to why this is happening... > > just not able to find the cause of the problem at 11th time when we > > issue the __dpmi_int(0x13,®s); interrupt. > > Difficult to diagnose without very detailed information, such as the EXAC= T > messages to the screen each time it hangs. Yes I have tried with the exes in the links you have posted above but to no result.. DJGPP 2.03p2 or 2.04? guess version 2.02...(how can I verify it?) ..opened in notepad and seen something like v2.02 2. Pure Dos...no TSRs no drivers nothing... the problem occures with any USB pen drive. actually I have two scenarios... one is to boot from and run the utility from network and another is to boot and run from USB pen drive.. In network case the same machine, same DOS environment , the utility works fine but when i Boot from USB, the utility hangs at an LBA value 63. 3.THe utility is a backup and restore utility that works on the flash disk. 4.But when I run GHOST from USB the utility is working fine.... 5. One thing i observed, when i played with config.sys file with different stack sizes and file handles etc.. the control has progressed very much but still after some times, it hangs... but the same utility from network boot on the same device did not pose any threats... please advice