1.

Solve : Can't run dos from Hdd??

Answer» <html><body><p>Ok so a few weeks ago i pulled out my dads <a href="https://interviewquestions.tuteehub.com/tag/old-585313" style="font-weight:bold;" target="_blank" title="Click to know more about OLD">OLD</a> compaq presario 433. I turned it on and it said <br/>missing operating sys. so i tried to install dos. the a drive didn't read. i replaced the drive and <a href="https://interviewquestions.tuteehub.com/tag/installed-499454" style="font-weight:bold;" target="_blank" title="Click to know more about INSTALLED">INSTALLED</a> dos 6.22. after installation the computer restarted and said missing os again? why. So using a floppy hdd for dos  meaning i have a floppy as my hdd. i put that in and it worked so i changed the dir. from A:\ to C:\ <br/>the hdd seems to have all sys files why won't it work?if you used the Fdisk command to make the partition you need a partition activeso i sould delete partition make a new one and install again?Yes. Use the FDISK program from MSDOS from the floppy.<br/>Make a single partition. Not too big. Don't forget to make it active.<br/>Don't try to make a partition above 2GB.<br/>Then reboot from floppy and do:<br/>format c:/s<br/>After that you can boot from the C: drive.<br/>he doesn't have to remake it if it is already under 2 GB just make it active. Quote from: mat123 on March 07, 2010, 07:00:51 AM</p><blockquote>he doesn't have to remake it if it is already under 2 GB just make it active.<br/></blockquote> Not true.how is it not true?The FDISK program in WIndows <a href="https://interviewquestions.tuteehub.com/tag/98-malyana-ka-rinae-samajhata-para-hasatakashhara-236807" style="font-weight:bold;" target="_blank" title="Click to know more about 98">98</a> differs from earlier versions. Did he say he used the actual FDISK for MSDOS and that no other program was used to create partitions?<br/>The 2GB pr less partition must be the first on the drive and the drive must be partitioned by a program that conforms to the MS-DOS limitations about <a href="https://interviewquestions.tuteehub.com/tag/large-1066424" style="font-weight:bold;" target="_blank" title="Click to know more about LARGE">LARGE</a> drives. The BIOS should also conform to the MS DOS limitation.<br/><br/> Quote<blockquote>  (b) 2 GB (gigabytes) includes a limit of 1024 cylinders per drive<br/>       imposed by the standard AT ROM BIOS interrupt 13 protocol.<br/></blockquote> <a href="https://support.microsoft.com/kb/69912">http://support.microsoft.com/kb/69912</a><br/><br/>In short, you end of with a drive that can not be of much piratical use for other Operating systems. Better to just use an old 1.5 GB drive for DOS.<br/><br/><em>Now if I am wrong about his please correct me. I am depending on memory, which is not getting very old, Version 72..</em><br/><br/><br/><br/>that makes since I'm familiar from 98 upThanks a lot guys every-thing works! Anyway just saying my hdd is only 540mg but just to know is it possible to make a hdd bigger when creating a new partition? Because the only thing i'm going to use this computer for is old dos games for the work better in original dos rather then win 98I've created partitions with Windows 2000 and XP and it worked fine to install DOS 6.22....<br/><br/>Windows 98's FDISK only creates partitions that cannot be used with DOS when you create one larger then 2GB.<br/><br/>And the only reason is because that is beyond the limit of FAT, not because of some inherent flaw in the way it was partitioned.<br/><br/>You don't even need to say N to the "Enable Large disk support for drives &gt;2GB?" prompt. as long as you make your drives &lt;2GB you can use them with DOS, it doesn't matter what OS you create the partitions with or what your format them with- you can use FDISK, you can use Windows XP's Disk management with the drive attached in an enclosure; you could use gparted, if you wanted to. as long as the drive &lt; 2GB DOS can format it. (not counting SCSI drives)<br/><br/>Actually, there is a  single exception- some older NT OS's can format FAT drives up to 4GB using 64K clusters. these have problems being used in Any other OS, including DOS, Windows 95, 98, and ME. this "feature" was removed starting with Windows 2000.<br/><br/><br/><br/>BC is ignoring the 1024 issue. Just because it has not bit you yet does not mean it will never bite. <em>We are talking about using older versions of DOS that do not have the 1024 thing fixed.</em> Or the BIOS does not get the needed support for DOS. <br/><br/>Maybe BC was born after that period  of PC history.The context here is about old PCs and old Operating systems. There was a transition period where the OS and the BIOS did not fully understand each other when large hard drives with more that 1024 cylinders became popular. In some cases the only effective remedy was to pin the dive so that it had a much smaller capacity.<br/><br/>And at one time this problem was also in Linux, so it is not all a Microsoft thing.<br/><br/><em>These comments do not apply to newer PCs and newer OS.</em><br/> Quote<blockquote>BC is ignoring the 1024 issue. Just because it has not bit you yet does not mean it will never bite. We are talking about using older versions of DOS that do not have the 1024 thing fixed. Or the BIOS does not get the needed support for DOS. <br/></blockquote> <br/>No I'm not. I actually saw the OP's OS selection:<br/> Quote<blockquote>installed dos 6.22<br/></blockquote> <br/><br/>Additionally, the "1024 issue" was purely an issue relating to the BIOS, or more precisely, INT 13H. And, even more relevant, is it simply prevented you from using the full size of the drive.<br/><br/>It didn't stop you from using disk <a href="https://interviewquestions.tuteehub.com/tag/space-239477" style="font-weight:bold;" target="_blank" title="Click to know more about SPACE">SPACE</a> within the first 8.5GB, regardless of who allocated it.  If you create a 2GB partition and a 78GB partition on one disk, you can safely install DOS on the 2GB partition and windows 2000 or XP or whatever on the 78GB partition, and freely boot between them. You will be able to access the 2GB partition from the windows installation but you will not be able to access the Windows partition from the DOS install.<br/><br/>Also, we don't have to worry about the 1024 cylinder limit at all to begin with, since the BIOS of the compaq presario 433 is limited to 220MB and will only use the first 220MB of any disk you install anyway.<br/><br/></body></html>


Discussion

No Comment Found

Related InterviewSolutions