142Managing partitions using GDisk

Support for Large Hard Disks

Support for Large Hard Disks

GDisk includes large disk drive support for IDE and SCSI hard drives (disks that exceed the 1024 cylinder BIOS limitation, which translates to a capacity greater than 7.8 GB). GDisk can directly access hard disks through the IDE controller or ASPI interface provided by an ASPI driver. Take care when creating partitions for operating systems with inherent partition size limitations.

Remember the following information when you create partitions for use in

Windows 95/98:

On a system with a PC BIOS that does not support interrupt 13h extended disk services, ensure that the partitions created can be used as intended. When a primary partition or extended partition starts or ends past the 7.8 GB limit of the hard drive, it is not accessible on such systems in Windows or in DOS-only mode. This affects all logical partitions contained within an extended partition that starts or ends past the limit.

Remember the following information when you create partitions for use in

Windows NT:

According to the Microsoft Knowledge Base, Windows NT NTFS bootable partitions cannot exceed 7.8 GB (8,455,716,864 bytes). This information is detailed in the Microsoft Knowledge Base Article “Windows NT Boot Process and Hard Disk Constraints,” Article ID: Q114841.

Non-bootable NTFS partitions do not have this size limitation.

Windows NT cannot start from partitions that start or end beyond the 1024- cylinder boundary. If this condition exists, Windows NT reports a “Boot Record Signature AA55 Not Found” error message.

Windows NT does not support drives larger than 7.8 GB unless you install Service Pack 4 or apply the ATAPI hot fix to Service Pack 3. This information is included in the Microsoft Knowledge Base Article “IBM DTTA-351010 10.1 GB Drive Capacity Is Inaccurate,” Article ID: Q183654.

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Symantec 10024709 manual Support for Large Hard Disks