zz96bw@sdcc7.UUCP (ENGINEERS) (03/06/85)
I would like to know if anybody has had alot of experience with the IBM PC-AT hard disk drives and backupp software? I had A 20Mb hard disk crash and tried to recover it; no luck then tried to restore the backup we had and t had a hard error on 1 of the 6 1.2Mb disks which was right at the end of a disk (actually next to last) we then lost the last file also even though that particular file was not affected the Restore would not work. IBM could not give me any answers here in San Diego and I need to restore that file. Thankyou Brad Waller (619) 450-0531
lotto@talcott.UUCP (Jerry Lotto) (03/08/85)
> I would like to know if anybody has had alot of experience with the IBM > PC-AT hard disk drives and backupp software? I had A 20Mb hard disk crash > and tried to recover it; no luck then tried to restore the backup we had > and t had a hard error on 1 of the 6 1.2Mb disks which was right at the > end of a disk (actually next to last) we then lost the last file also even > though that particular file was not affected the Restore would not work. > > IBM could not give me any answers here in San Diego and I need to restore > that file. > Thankyou > Brad Waller > (619) 450-0531 I had a similar problem... My restore aborted on the 10th disk out of 11 due to an error reading a file (the backup was also on 1.2 Mb floppies...). The directory which that file was located in ended up in pretty bad shape after the restore and I had to delete it with everything else. I then restored again starting from disk 10. Despite the error message "disk out of sequence" I continued and recovered all of the remaining files. A second curious aspect of this problem was that the backup ID entry on disk 10 was 0 bytes long. On the second restore I got the message "Restoring from Disk 0". My second alternative (which I did not have to resort to) was to manually fix up a copy of the backup file with the debugger. There is sufficient information to figure this out between the DOS tech ref manual and experimentation with a dummy file. For the most part, each file contains a header (~180 bytes?) with the end of file pointer, directory info and probably a few other tidbits. You have to strip this off, adjust the file size, relocate the data down to 100H (yes, you have to rename .hex or .exe files before doing this) and write it back. Good luck.