jpw@cblpf.UUCP (03/31/87)
*** REPLACE THIS LINE WITH YOUR MESSAGE *** I have recently attempted to upgrade my Xerox 6064 (a.k.a. ATT6300) with a 30 Meg hard disk. The computer is equipped with ROM BIOS version 1.43. The drive is a Seagate ST-238 with a Western Digital RLL controller. The drive was checked by the dealer and formatted with IBM DOS 3.1. When I initially accessed the drive, a "DIR" stated that I had the expected 32,XXX,XXX bytes free. I went through the reformatting procedure outlined in the XEROX documentation to install their version of MS-DOS 3.1. This included a physical format, paritioning and DOS formatting. The drive was partitioned as a single drive. A display of the partition configuration states that the disk is 32 Meg. When I boot this version of DOS and do a "DIR" it claims I have only 21,XXX,XXX bytes free. WHERE DID THE OTHER 10 MEGABYTES GO !!! The IBM DOS recognized the full capacity of the disk, yet the XEROX MS-DOS 3.1 does not. What gives ? As far as I can tell, I didn't commit any cockpit error, so I'm wondering about how DOS handles the differences between RLL and MFM encoding. Mike Vehonsky AT&T Network Systems Columbus, Ohio cbosgd!cblpf!jpw