entry (the offset in sectors of the extended partition Volume in the extended partition (figure 2). On the start screen ensure that the correct disk is displayed, thenĬlick on the Goto EPBR (Extended Partition Boot Record) button - see figure 1.Īfter clicking on the Goto EPBR button, the next window will display the partition information for the first logical The EPBR will contain a partition table with up to two entries - the first entry will display the Logical Volumes offset from the EPBR, the second entry will display the next EPBR's offset from this EPBR. Every Logical Volume in an Extended Partition will be preceeded by its own EPBR. PTEDIT32 uses the term EPBR (Extended Partition Boot Record) instead of EBR (Extended Boot Record). The Extended partition contains the following logical volumes. Partition Table Entry 4 (Extended Partition).Partition Table Entry 3 (Primary type) - 30 GiB NTFS.Partition Table Entry 2 (Primary type) - 20 GiB NTFS.Partition Table Entry 1 (Primary type) - 1 GiB FAT (type 06).The partitioning scheme for this disk is as follows. The screenshots used in this guide were captured from a Virtual Hard Disk (.VHD) created and partitioned using Windows 7 Diskpart - partitions are aligned in Megabytes (they are not aligned to virtual cylinder boundaries as per the Windows NT5 partitioning scheme). LBA values will however be displayed correctly. NOTE - Any cylinder values greater than 1023 will not be displayed in PTEDIT (this includes any partitions starting after the first 8 GB (assuming a sector size of 512 bytes). PTEDIT32 will display partition information based on Cylinder/Head/Sector (CHS) and Logical Block Addressing (LBA) values. Please do refer to Dan's excellent guide for more detailed information. Note - this page has been adapted from Dan Goodell's Understanding MultiBootingĪnd Booting Windows from an Extended Partition guide - it focuses on calculating the logical volume offset and editing the logical volume's hidden sector value. This mini guide will focus on using PTEDIT32.EXE (the 32-bit version of Powerquest’s Partition Table Editor) to edit partition settings to enable booting Windows from a Logical Volume.
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