Seagate HDD type: 3550A ----------------------- Cyl:1018 Heads:14 Sect/T:62 Mode:Normal TotalS:883624 What to do? The two binary files (MBR3550A and BOO3550A) should be copied to the physical sectors of the Seagate 3550A HDD, as follows: MBR3550A --> Cyl:0 Head:0 Sect:1 BOO3550A --> Cyl:0 Head:1 Sect:1 EXAMPLE (the HDD is the second one in a 2-drive system): DE.EXE MBR3550A Tools/Write_Oject_To/Physical Sectors/Hard Disk_2/Cyl:0_Side:0_Sec:1 DE.EXE BOO3550A Tools/Write_Oject_To/Physical Sectors/Hard Disk_2/Cyl:0_Side:1_Sec:1 ADDITIONAL INFO ************************************************************** MBR3550A - Binary Image of the Partition Table (1 Bootable BIGDOS Partition) -------- Geometrical Info according to the Disk Editor from Norton Utilities: -----Start----- -----Ending---- Relative Number of System ³ Boot ³ Side Cyl Sect ³ Side Cyl Sect ³ Sector ³ Sectors ³ -------------------------------------------------------------------- BIGDOS ³ Yes ³ 1 0 1 ³ 13 1017 62 ³ 62 ³ 883562 ( = 883624 -62) BOO3550A - Binary Image of the BOOT Sector -------- OEM ID : MSDOS5.0 Bytes per sector : 512 Sectors per cluster : 16 Reserved sectors at beginning : 1 FAT copies : 2 Root directory entries : 512 Total sectors on disk : (Unused) Media descriptor byte : F8 Hex Sectors per FAT : 216 Sectors per track : 62 Sides : 14 Special hidden sectors : 62 Big total number of sectors : 883562 Physical drive number : 128 Extended Boot Record Signatura : 29 Hex Volume Serial Number : 12411808 Hex Volume Label : SG3550A_DRV File System ID : FAT16 DcsabaS