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- From: sonix@schunix.uucp (Duane Morin)
- Newsgroups: comp.os.msdos.programmer
- Subject: Invalid Media: Correction??
- Message-ID: <1992Aug27.141456.24146@schunix.uucp>
- Date: 27 Aug 92 14:14:56 GMT
- Organization: SCHUNIX Public Access Unix for Worcester County, Massachusetts, USA
- Lines: 49
-
- Ok, so, I stay home for ONE sick day, and when I come back, the boss tells me
- that his computer is dead. This is what it says: Missing Operating System.
-
- Ok, no problem. I try to boot from a floppy. Works. Access C drive. Works.
- Do a directory of C? Invalid Media Type. Darn. Try to SYS from A to C?
- Write failure.
-
- What I figure happened is this (figured, with a little help from PCTOOLS):
- Somehow, he managed to COMPLETELY trash his boot sector. A status report of
- whatever PCTOOLS thought his hard disk was showed things such as the
- following:
-
- 0 - bytes total disk space
- 178,327,832 - bytes in 0 files and 0 directories <-- Its NOT a 178M disk!
- -,178,327,832 - bytes available on disk
-
- 512 - bytes in each sector
- 0 -sector in DOS boot record
- 0 - sectores in each FAT ( 0 copies )
- 0 - sectors in root directory (0 entries)
- 0 - sectors in logical disk
-
- 00h - media descriptor
- 12 bit - File Allocation Tables
- 0 - bytes in each allocation unit (cluster)
- 0 - sectors in each allocation unit (cluster)
- 0 - total allocation units for data storage
-
- Logical Drive C: is accessed as a device driver.
-
- FDISK shows a recognized partition of the correct size, (102M), but says
- "system: UNKNOWN".
-
- My question: We don't want to completely reformat this disk, there's alot
- of information on it that we hope not to lose. I would figure that the
- boot sector has been trashed, not the file allocation tables, so maybe
- we can resurrect some of the data. Does anyone know the best way to tackle
- this fairly nasty problem? Like, can I get to the hard disk to write a new
- media descriptor? How would I go about doing that?
-
- Any suggestions, other than to back up the computer more frequently, greatly
- appreciated. Thank you.
-
- Duane Morin
- Software Development Manager
- Walker Sonix, Inc.
- Worcester, MA 01604
- sonix@schunix.uucp
- sonix@aol.com
-