File:IBM PC XT 10 meg MFM low level format.jpg

{{Non-free use rationale

|Article=Disk formatting

|Description=Example of obsolete 1987 software program for low-level formatting MFM/RLL hard drives, to recreate track and sector boundaries, check for media errors, and to also configure the sector interleaving.

|Source=IBM PC XT with 640 kilobytes of memory, text-only monochrome video, 360k floppy drive, Western Digital MFM drive controller, and a Seagate 10 megabyte MFM hard drive

|Portion=

|Low_resolution=image is 500x455, and was taken with a handheld digital camera of the IBM PC XT monochrome monitor. Slight camera shake so the image is blurry.

|Purpose=Documentation of the obscure low-level formatting process that was once common with early IBM PC MFM/RLL hard drives, typically under 50 megabytes in total partition size.

|Replaceability=This image generally cannot be replaced by free content. Low level formatting cannot be done with modern IDE/SATA drives. This function was typically solely performed by utilities provided by the hard drive or MFM/RLL controller manufacturer.

}}

{{Non-free use rationale

|Article=Interleaving (disk storage)

|Description=Example of obsolete 1987 software program for low-level formatting MFM/RLL hard drives, to recreate track and sector boundaries, check for media errors, and to also configure the sector interleaving.

|Source=IBM PC XT with 640 kilobytes of memory, text-only monochrome video, 360k floppy drive, Western Digital MFM drive controller, and a Seagate 10 megabyte MFM hard drive

|Portion=

|Low_resolution=image is 500x455, and was taken with a handheld digital camera of the IBM PC XT monochrome monitor. Slight camera shake so the image is blurry.

|Purpose=Documentation of the obscure low-level formatting process that was once common with early IBM PC MFM/RLL hard drives, typically under 50 megabytes in total partition size.

|Replaceability=This image generally cannot be replaced by free content. Low level formatting cannot be done with modern IDE/SATA drives. This function was typically solely performed by utilities provided by the hard drive or MFM/RLL controller manufacturer.

}}

{{Non-free use rationale

|Article=Hard disk drive

|Description=Example of obsolete 1987 software program for low-level formatting MFM/RLL hard drives, to recreate track and sector boundaries, check for media errors, and to also configure the sector interleaving.

|Source=IBM PC XT with 640 kilobytes of memory, text-only monochrome video, 360k floppy drive, Western Digital MFM drive controller, and a Seagate 10 megabyte MFM hard drive

|Portion=

|Low_resolution=image is 500x455, and was taken with a handheld digital camera of the IBM PC XT monochrome monitor. Slight camera shake so the image is blurry.

|Purpose=Documentation of the obscure low-level formatting process that was once common with early IBM PC MFM/RLL hard drives, typically under 50 megabytes in total partition size.

|Replaceability=This image generally cannot be replaced by free content. Low level formatting cannot be done with modern IDE/SATA drives. This function was typically solely performed by utilities provided by the hard drive or MFM/RLL controller manufacturer.

}}

{{Non-free use rationale

|Article=Disk drive performance characteristics

|Description=Example of obsolete 1987 software program for low-level formatting MFM/RLL hard drives, to recreate track and sector boundaries, check for media errors, and to also configure the sector interleaving.

|Source=IBM PC XT with 640 kilobytes of memory, text-only monochrome video, 360k floppy drive, Western Digital MFM drive controller, and a Seagate 10 megabyte MFM hard drive

|Portion=

|Low_resolution=image is 500x455, and was taken with a handheld digital camera of the IBM PC XT monochrome monitor. Slight camera shake so the image is blurry.

|Purpose=Documentation of the obscure low-level formatting process that was once common with early IBM PC MFM/RLL hard drives, typically under 50 megabytes in total partition size.

|Replaceability=This image generally cannot be replaced by free content. Low level formatting cannot be done with modern IDE/SATA drives. This function was typically solely performed by utilities provided by the hard drive or MFM/RLL controller manufacturer.

}}

{{Non-free software screenshot|image has rationale=yes|Screenshots of DOS software}}