Editing Disk density (section)

== Overview ==
{| class="wikitable" style="text-align:center;"
|-
! Size
! colspan="2" | 8-inch
! colspan="4" | 5¼-inch
! colspan="5" | 3½-inch
|-
! Density
! SD
! DD
! SD
! DD
! QD
! HD
! colspan="2" | DD
! HD
! ED<ref name="Mueller_1994_HW"/>
! TD<ref name="NEC_1991_uPD72070"/>
|-
! Disk coating
| colspan="5" | Iron oxide<ref name="Mueller_1994_HW"/><ref name="Yaskawa_1988_MR"/>
| Cobalt<ref name="Mueller_1994_HW"/><ref name="Yaskawa_1988_MR"/>
| ?
| Iron oxide, Cobalt?<ref name="Mueller_1994_HW"/>
| Cobalt<ref name="Mueller_1994_HW"/><ref name="Yaskawa_1988_MR"/>
| Barium ferrite<ref name="Mueller_1994_HW"/>
| Barium ferrite [https://www.vogons.org/viewtopic.php?t=98550]
|-
! Coercivity <nowiki>[</nowiki>[[Oersted|Oe]]<nowiki>]</nowiki>
| colspan="5" | 290,<ref name="Johnson_2011_HDDD"/> 300<ref name="Scott_1990_UM"/><ref name="Mueller_1994_HW"/><ref name="Yaskawa_1988_MR"/> 
| 600,<ref name="Mueller_1994_HW"/><ref name="Yaskawa_1988_MR"/> 660,<ref name="Johnson_2011_HDDD"/> 670<ref name="Scott_1990_UM"/>
| ca. 600
| 600?,<ref name="Mueller_1994_HW"/><ref name="Yaskawa_1988_MR"/> 660,<ref name="Johnson_2011_HDDD"/> 670<ref name="Scott_1990_UM"/>
| 700,<ref name="Scott_1990_UM"/> 720<ref name="Johnson_2011_HDDD"/><ref name="Mueller_1994_HW"/>
| 750?,<ref name="Mueller_1994_HW"/> 1060,<ref name="Johnson_2011_HDDD"/> 1200
| ?
|-
! Coating thickness <nowiki>[</nowiki>[[μm]]<nowiki>]</nowiki>
| 110
| 110
| ?
| 100,<ref name="Scott_1990_UM"/> 2.5,<ref name="Johnson_2011_HDDD"/> 2.0-3.0<ref name="Yaskawa_1988_MR"/>
| ?
| 55,<ref name="Scott_1990_UM"/> 1.3,<ref name="Johnson_2011_HDDD"/> 1.0-1.5<ref name="Yaskawa_1988_MR"/>
| ?
| 65,<ref name="Scott_1990_UM"/> 1.9,<ref name="Johnson_2011_HDDD"/> 2.0-3.0<ref name="Yaskawa_1988_MR"/>
| 55,<ref name="Scott_1990_UM"/> 0.9,<ref name="Johnson_2011_HDDD"/> 1.0-1.5<ref name="Yaskawa_1988_MR"/>
| ?
| ?
|-
! [[Line code]]
| [[Digital FM|FM]]
| [[Modified Frequency Modulation|MFM]], [[M²FM]]<!-- Intel iSBC/ISIS only -->, FM/MFM<!-- DEC RX02 used a combination of FM and MFM --> or [[Group-coded recording|GCR]]
| FM
| colspan="2" | MFM or GCR
| MFM
| MFM<ref name="Epson_1984_PF-10"/>
| MFM or GCR<!-- Apple Macintosh -->
| colspan="3" | MFM
|-
! Track width [mm]
| colspan="4" | 0.330<ref name="Mueller_1994_HW"/>
| colspan="2" | 0.160<ref name="Mueller_1994_HW"/>
| ?
| colspan="3" | 0.115<ref name="Mueller_1994_HW"/>
| ?
|-
! Track density [tpi]
| colspan="4" | 48<ref name="Mueller_1994_HW"/>
| 96<ref name="Mueller_1994_HW"/> or 100
| 96<ref name="Mueller_1994_HW"/>
| 67.5<ref name="Epson_1984_PF-10"/>
| colspan="3" | 135<ref name="Mueller_1994_HW"/>
| 406.5<ref name="NEC_1991_uPD72070"/>
|-
! Bit density [bpi]
| colspan="5" | 5,876,<ref name="Intel_1992_82077SL"/><ref name="Mueller_1994_HW"/> 5,922<ref name="Williams_DSM"/>
| 9,646,<ref name="Mueller_1994_HW"/> 9,870<ref name="Intel_1992_82077SL"/>
| 8,650<ref name="Epson_1984_PF-10"/>
| 8,717<ref name="Intel_1992_82077SL"/><ref name="Mueller_1994_HW"/>
| 17,432,<ref name="Intel_1992_82077SL"/> 17,434<ref name="Mueller_1994_HW"/>
| 34,868<ref name="Intel_1992_82077SL"/><ref name="Mueller_1994_HW"/>
| 36,700<ref name="NEC_1991_uPD72070"/>
|-
! Recording direction
| colspan="9" | longitudinal&nbsp;/ horizontal<ref name="Mueller_1994_HW"/>
| perpendicular&nbsp;/ vertical<ref name="Mueller_1994_HW"/>
| longitudinal<ref name="Intel_1992_82077SL"/>&nbsp;/ horizontal<ref name="Mueller_1994_HW"/>
|}