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How to Convert from IDE (UDMA mode 4) to IDE (PIO mode 4)?
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How to Convert from IDE (UDMA mode 4) to IDE (PIO mode 4)?

Learn how to convert data transfer units from IDE (UDMA mode 4) to IDE (PIO mode 4) for legacy IDE/ATA storage devices, useful for troubleshooting, benchmarking, and maintaining older computer systems.

Please check your input. It must be a valid numeric value.

IDE (UDMA mode 4) to IDE (PIO mode 4) Conversion Table

IDE (UDMA mode 4) IDE (PIO mode 4)

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.
Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.
IDE (UDMA mode 4) to IDE (PIO mode 4) Conversion Table
IDE (UDMA mode 4) IDE (PIO mode 4)

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  9. How to convert from kilobit/second [kb/s] to IDE (UDMA mode 4)?
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  19. How to convert from megabyte/second [MB/s] to IDE (UDMA mode 4)?
  20. How to convert from IDE (UDMA mode 4) to megabyte/second [MB/s]?
  21. How to convert from gigabit/second (SI def.) to IDE (UDMA mode 4)?
  22. How to convert from IDE (UDMA mode 4) to gigabit/second (SI def.)?
  23. How to convert from gigabyte/second (SI def.) to IDE (UDMA mode 4)?
  24. How to convert from IDE (UDMA mode 4) to gigabyte/second (SI def.)?
  25. How to convert from gigabit/second [Gb/s] to IDE (UDMA mode 4)?
  26. How to convert from IDE (UDMA mode 4) to gigabit/second [Gb/s]?
  27. How to convert from gigabyte/second [GB/s] to IDE (UDMA mode 4)?
  28. How to convert from IDE (UDMA mode 4) to gigabyte/second [GB/s]?
  29. How to convert from terabit/second (SI def.) to IDE (UDMA mode 4)?
  30. How to convert from IDE (UDMA mode 4) to terabit/second (SI def.)?
  31. How to convert from terabyte/second (SI def.) to IDE (UDMA mode 4)?
  32. How to convert from IDE (UDMA mode 4) to terabyte/second (SI def.)?
  33. How to convert from terabit/second [Tb/s] to IDE (UDMA mode 4)?
  34. How to convert from IDE (UDMA mode 4) to terabit/second [Tb/s]?
  35. How to convert from terabyte/second [TB/s] to IDE (UDMA mode 4)?
  36. How to convert from IDE (UDMA mode 4) to terabyte/second [TB/s]?
  37. How to convert from ethernet to IDE (UDMA mode 4)?
  38. How to convert from IDE (UDMA mode 4) to ethernet?
  39. How to convert from ethernet (fast) to IDE (UDMA mode 4)?
  40. How to convert from IDE (UDMA mode 4) to ethernet (fast)?
  41. How to convert from ethernet (gigabit) to IDE (UDMA mode 4)?
  42. How to convert from IDE (UDMA mode 4) to ethernet (gigabit)?
  43. How to convert from OC1 to IDE (UDMA mode 4)?
  44. How to convert from IDE (UDMA mode 4) to OC1?
  45. How to convert from OC3 to IDE (UDMA mode 4)?
  46. How to convert from IDE (UDMA mode 4) to OC3?
  47. How to convert from OC12 to IDE (UDMA mode 4)?
  48. How to convert from IDE (UDMA mode 4) to OC12?
  49. How to convert from OC24 to IDE (UDMA mode 4)?
  50. How to convert from IDE (UDMA mode 4) to OC24?
  51. How to convert from OC48 to IDE (UDMA mode 4)?
  52. How to convert from IDE (UDMA mode 4) to OC48?
  53. How to convert from OC192 to IDE (UDMA mode 4)?
  54. How to convert from IDE (UDMA mode 4) to OC192?
  55. How to convert from OC768 to IDE (UDMA mode 4)?
  56. How to convert from IDE (UDMA mode 4) to OC768?
  57. How to convert from ISDN (single channel) to IDE (UDMA mode 4)?
  58. How to convert from IDE (UDMA mode 4) to ISDN (single channel)?
  59. How to convert from ISDN (dual channel) to IDE (UDMA mode 4)?
  60. How to convert from IDE (UDMA mode 4) to ISDN (dual channel)?
  61. How to convert from modem (110) to IDE (UDMA mode 4)?
  62. How to convert from IDE (UDMA mode 4) to modem (110)?
  63. How to convert from modem (300) to IDE (UDMA mode 4)?
  64. How to convert from IDE (UDMA mode 4) to modem (300)?
  65. How to convert from modem (1200) to IDE (UDMA mode 4)?
  66. How to convert from IDE (UDMA mode 4) to modem (1200)?
  67. How to convert from modem (2400) to IDE (UDMA mode 4)?
  68. How to convert from IDE (UDMA mode 4) to modem (2400)?
  69. How to convert from modem (9600) to IDE (UDMA mode 4)?
  70. How to convert from IDE (UDMA mode 4) to modem (9600)?
  71. How to convert from modem (14.4k) to IDE (UDMA mode 4)?
  72. How to convert from IDE (UDMA mode 4) to modem (14.4k)?
  73. How to convert from modem (28.8k) to IDE (UDMA mode 4)?
  74. How to convert from IDE (UDMA mode 4) to modem (28.8k)?
  75. How to convert from modem (33.6k) to IDE (UDMA mode 4)?
  76. How to convert from IDE (UDMA mode 4) to modem (33.6k)?
  77. How to convert from modem (56k) to IDE (UDMA mode 4)?
  78. How to convert from IDE (UDMA mode 4) to modem (56k)?
  79. How to convert from SCSI (Async) to IDE (UDMA mode 4)?
  80. How to convert from IDE (UDMA mode 4) to SCSI (Async)?
  81. How to convert from SCSI (Sync) to IDE (UDMA mode 4)?
  82. How to convert from IDE (UDMA mode 4) to SCSI (Sync)?
  83. How to convert from SCSI (Fast) to IDE (UDMA mode 4)?
  84. How to convert from IDE (UDMA mode 4) to SCSI (Fast)?
  85. How to convert from SCSI (Fast Ultra) to IDE (UDMA mode 4)?
  86. How to convert from IDE (UDMA mode 4) to SCSI (Fast Ultra)?
  87. How to convert from SCSI (Fast Wide) to IDE (UDMA mode 4)?
  88. How to convert from IDE (UDMA mode 4) to SCSI (Fast Wide)?
  89. How to convert from SCSI (Fast Ultra Wide) to IDE (UDMA mode 4)?
  90. How to convert from IDE (UDMA mode 4) to SCSI (Fast Ultra Wide)?
  91. How to convert from SCSI (Ultra-2) to IDE (UDMA mode 4)?
  92. How to convert from IDE (UDMA mode 4) to SCSI (Ultra-2)?
  93. How to convert from SCSI (Ultra-3) to IDE (UDMA mode 4)?
  94. How to convert from IDE (UDMA mode 4) to SCSI (Ultra-3)?
  95. How to convert from SCSI (LVD Ultra80) to IDE (UDMA mode 4)?
  96. How to convert from IDE (UDMA mode 4) to SCSI (LVD Ultra80)?
  97. How to convert from SCSI (LVD Ultra160) to IDE (UDMA mode 4)?
  98. How to convert from IDE (UDMA mode 4) to SCSI (LVD Ultra160)?
  99. How to convert from IDE (PIO mode 0) to IDE (UDMA mode 4)?
  100. How to convert from IDE (UDMA mode 4) to IDE (PIO mode 0)?
  101. How to convert from IDE (PIO mode 1) to IDE (UDMA mode 4)?
  102. How to convert from IDE (UDMA mode 4) to IDE (PIO mode 1)?
  103. How to convert from IDE (PIO mode 2) to IDE (UDMA mode 4)?
  104. How to convert from IDE (UDMA mode 4) to IDE (PIO mode 2)?
  105. How to convert from IDE (PIO mode 3) to IDE (UDMA mode 4)?
  106. How to convert from IDE (UDMA mode 4) to IDE (PIO mode 3)?
  107. How to convert from IDE (PIO mode 4) to IDE (UDMA mode 4)?
  108. How to convert from IDE (UDMA mode 4) to IDE (PIO mode 4)?
  109. How to convert from IDE (DMA mode 0) to IDE (UDMA mode 4)?
  110. How to convert from IDE (UDMA mode 4) to IDE (DMA mode 0)?
  111. How to convert from IDE (DMA mode 1) to IDE (UDMA mode 4)?
  112. How to convert from IDE (UDMA mode 4) to IDE (DMA mode 1)?
  113. How to convert from IDE (DMA mode 2) to IDE (UDMA mode 4)?
  114. How to convert from IDE (UDMA mode 4) to IDE (DMA mode 2)?
  115. How to convert from IDE (UDMA mode 0) to IDE (UDMA mode 4)?
  116. How to convert from IDE (UDMA mode 4) to IDE (UDMA mode 0)?
  117. How to convert from IDE (UDMA mode 1) to IDE (UDMA mode 4)?
  118. How to convert from IDE (UDMA mode 4) to IDE (UDMA mode 1)?
  119. How to convert from IDE (UDMA mode 2) to IDE (UDMA mode 4)?
  120. How to convert from IDE (UDMA mode 4) to IDE (UDMA mode 2)?
  121. How to convert from IDE (UDMA mode 3) to IDE (UDMA mode 4)?
  122. How to convert from IDE (UDMA mode 4) to IDE (UDMA mode 3)?
  123. How to convert from IDE (UDMA-33) to IDE (UDMA mode 4)?
  124. How to convert from IDE (UDMA mode 4) to IDE (UDMA-33)?
  125. How to convert from IDE (UDMA-66) to IDE (UDMA mode 4)?
  126. How to convert from IDE (UDMA mode 4) to IDE (UDMA-66)?
  127. How to convert from USB to IDE (UDMA mode 4)?
  128. How to convert from IDE (UDMA mode 4) to USB?
  129. How to convert from firewire (IEEE-1394) to IDE (UDMA mode 4)?
  130. How to convert from IDE (UDMA mode 4) to firewire (IEEE-1394)?
  131. How to convert from T0 (payload) to IDE (UDMA mode 4)?
  132. How to convert from IDE (UDMA mode 4) to T0 (payload)?
  133. How to convert from T0 (B8ZS payload) to IDE (UDMA mode 4)?
  134. How to convert from IDE (UDMA mode 4) to T0 (B8ZS payload)?
  135. How to convert from T1 (signal) to IDE (UDMA mode 4)?
  136. How to convert from IDE (UDMA mode 4) to T1 (signal)?
  137. How to convert from T1 (payload) to IDE (UDMA mode 4)?
  138. How to convert from IDE (UDMA mode 4) to T1 (payload)?
  139. How to convert from T1Z (payload) to IDE (UDMA mode 4)?
  140. How to convert from IDE (UDMA mode 4) to T1Z (payload)?
  141. How to convert from T1C (signal) to IDE (UDMA mode 4)?
  142. How to convert from IDE (UDMA mode 4) to T1C (signal)?
  143. How to convert from T1C (payload) to IDE (UDMA mode 4)?
  144. How to convert from IDE (UDMA mode 4) to T1C (payload)?
  145. How to convert from T2 (signal) to IDE (UDMA mode 4)?
  146. How to convert from IDE (UDMA mode 4) to T2 (signal)?
  147. How to convert from T3 (signal) to IDE (UDMA mode 4)?
  148. How to convert from IDE (UDMA mode 4) to T3 (signal)?
  149. How to convert from T3 (payload) to IDE (UDMA mode 4)?
  150. How to convert from IDE (UDMA mode 4) to T3 (payload)?
  151. How to convert from T3Z (payload) to IDE (UDMA mode 4)?
  152. How to convert from IDE (UDMA mode 4) to T3Z (payload)?
  153. How to convert from T4 (signal) to IDE (UDMA mode 4)?
  154. How to convert from IDE (UDMA mode 4) to T4 (signal)?
  155. How to convert from E.P.T.A. 1 (signal) to IDE (UDMA mode 4)?
  156. How to convert from IDE (UDMA mode 4) to E.P.T.A. 1 (signal)?
  157. How to convert from E.P.T.A. 1 (payload) to IDE (UDMA mode 4)?
  158. How to convert from IDE (UDMA mode 4) to E.P.T.A. 1 (payload)?
  159. How to convert from E.P.T.A. 2 (signal) to IDE (UDMA mode 4)?
  160. How to convert from IDE (UDMA mode 4) to E.P.T.A. 2 (signal)?
  161. How to convert from E.P.T.A. 2 (payload) to IDE (UDMA mode 4)?
  162. How to convert from IDE (UDMA mode 4) to E.P.T.A. 2 (payload)?
  163. How to convert from E.P.T.A. 3 (signal) to IDE (UDMA mode 4)?
  164. How to convert from IDE (UDMA mode 4) to E.P.T.A. 3 (signal)?
  165. How to convert from E.P.T.A. 3 (payload) to IDE (UDMA mode 4)?
  166. How to convert from IDE (UDMA mode 4) to E.P.T.A. 3 (payload)?
  167. How to convert from H0 to IDE (UDMA mode 4)?
  168. How to convert from IDE (UDMA mode 4) to H0?
  169. How to convert from H11 to IDE (UDMA mode 4)?
  170. How to convert from IDE (UDMA mode 4) to H11?
  171. How to convert from H12 to IDE (UDMA mode 4)?
  172. How to convert from IDE (UDMA mode 4) to H12?
  173. How to convert from Virtual Tributary 1 (signal) to IDE (UDMA mode 4)?
  174. How to convert from IDE (UDMA mode 4) to Virtual Tributary 1 (signal)?
  175. How to convert from Virtual Tributary 1 (payload) to IDE (UDMA mode 4)?
  176. How to convert from IDE (UDMA mode 4) to Virtual Tributary 1 (payload)?
  177. How to convert from Virtual Tributary 2 (signal) to IDE (UDMA mode 4)?
  178. How to convert from IDE (UDMA mode 4) to Virtual Tributary 2 (signal)?
  179. How to convert from Virtual Tributary 2 (payload) to IDE (UDMA mode 4)?
  180. How to convert from IDE (UDMA mode 4) to Virtual Tributary 2 (payload)?
  181. How to convert from Virtual Tributary 6 (signal) to IDE (UDMA mode 4)?
  182. How to convert from IDE (UDMA mode 4) to Virtual Tributary 6 (signal)?
  183. How to convert from Virtual Tributary 6 (payload) to IDE (UDMA mode 4)?
  184. How to convert from IDE (UDMA mode 4) to Virtual Tributary 6 (payload)?
  185. How to convert from STS1 (signal) to IDE (UDMA mode 4)?
  186. How to convert from IDE (UDMA mode 4) to STS1 (signal)?
  187. How to convert from STS1 (payload) to IDE (UDMA mode 4)?
  188. How to convert from IDE (UDMA mode 4) to STS1 (payload)?
  189. How to convert from STS3 (signal) to IDE (UDMA mode 4)?
  190. How to convert from IDE (UDMA mode 4) to STS3 (signal)?
  191. How to convert from STS3 (payload) to IDE (UDMA mode 4)?
  192. How to convert from IDE (UDMA mode 4) to STS3 (payload)?
  193. How to convert from STS3c (signal) to IDE (UDMA mode 4)?
  194. How to convert from IDE (UDMA mode 4) to STS3c (signal)?
  195. How to convert from STS3c (payload) to IDE (UDMA mode 4)?
  196. How to convert from IDE (UDMA mode 4) to STS3c (payload)?
  197. How to convert from STS12 (signal) to IDE (UDMA mode 4)?
  198. How to convert from IDE (UDMA mode 4) to STS12 (signal)?
  199. How to convert from STS24 (signal) to IDE (UDMA mode 4)?
  200. How to convert from IDE (UDMA mode 4) to STS24 (signal)?
  201. How to convert from STS48 (signal) to IDE (UDMA mode 4)?
  202. How to convert from IDE (UDMA mode 4) to STS48 (signal)?
  203. How to convert from STS192 (signal) to IDE (UDMA mode 4)?
  204. How to convert from IDE (UDMA mode 4) to STS192 (signal)?
  205. How to convert from STM-1 (signal) to IDE (UDMA mode 4)?
  206. How to convert from IDE (UDMA mode 4) to STM-1 (signal)?
  207. How to convert from STM-4 (signal) to IDE (UDMA mode 4)?
  208. How to convert from IDE (UDMA mode 4) to STM-4 (signal)?
  209. How to convert from STM-16 (signal) to IDE (UDMA mode 4)?
  210. How to convert from IDE (UDMA mode 4) to STM-16 (signal)?
  211. How to convert from STM-64 (signal) to IDE (UDMA mode 4)?
  212. How to convert from IDE (UDMA mode 4) to STM-64 (signal)?

What Is This Tool?

This converter tool allows users to transform data transfer measurements from IDE (UDMA mode 4), a fast Ultra DMA protocol, into IDE (PIO mode 4), a slower CPU-controlled mode, assisting in comparing performance, configuring legacy systems, and assessing hardware compatibility.

How to Use This Tool?

  • Enter the value in IDE (UDMA mode 4) units you want to convert.
  • Select IDE (PIO mode 4) as the target unit.
  • Click the convert button to see the equivalent data transfer rate.
  • Use the results to compare or configure legacy device settings.

Key Features

  • Converts data transfer rates between IDE (UDMA mode 4) and IDE (PIO mode 4).
  • Based on theoretical maximum throughput values.
  • Supports troubleshooting and benchmarking of legacy IDE/ATA devices.
  • Helpful for configuring BIOS or firmware in older systems.
  • Easy-to-use, browser-based interface.

Examples

  • 1 IDE (UDMA mode 4) equals approximately 3.9759 IDE (PIO mode 4).
  • 2 IDE (UDMA mode 4) equals roughly 7.9518 IDE (PIO mode 4).

Common Use Cases

  • Comparing transfer speeds between Ultra DMA and Programmed I/O modes on legacy drives.
  • Configuring or troubleshooting DMA modes in BIOS for older PCs or embedded systems.
  • Benchmarking or maintaining older PATA/IDE drives and optical drives.
  • Ensuring compatibility in industrial or retro-computing environments using historical ATA timings.
  • Recovering data from legacy IDE storage devices.

Tips & Best Practices

  • Verify your hardware supports the required IDE modes before configuration.
  • Use an 80-conductor IDE cable to ensure reliable Ultra DMA signaling.
  • Consider system overhead and hardware condition when interpreting conversion results.
  • Use this tool to assist in troubleshooting or benchmarking but verify with actual performance tests.
  • Avoid relying on IDE (PIO mode 4) for modern tasks due to its slower speed and higher CPU usage.

Limitations

  • The conversion is theoretical and based on maximum throughput; real-world speeds can vary.
  • IDE (PIO mode 4) is much slower and more CPU-intensive compared to IDE (UDMA mode 4).
  • Specific hardware components, such as 80-conductor cables, are necessary for proper UDMA operation.
  • This conversion may not reflect practical system performance due to overhead and device conditions.

Frequently Asked Questions

What is IDE (UDMA mode 4)?
IDE (UDMA mode 4), also known as Ultra DMA/66 (ATA-4), is a Parallel ATA transfer mode that moves data blocks between a drive and host using the Ultra DMA protocol, offering a theoretical throughput of about 66.7 megabytes per second.

How is IDE (PIO mode 4) different from IDE (UDMA mode 4)?
IDE (PIO mode 4) is a CPU-driven Programmed Input/Output timing mode with a maximum theoretical throughput of about 16.7 MB/s, whereas IDE (UDMA mode 4) uses the Ultra DMA protocol for faster, more efficient data transfer.

Why would I convert from IDE (UDMA mode 4) to IDE (PIO mode 4)?
Users convert to compare or configure data transfer rates between faster Ultra DMA modes and older CPU-driven PIO modes, which is useful for troubleshooting, benchmarking, or maintaining compatibility with legacy IDE/ATA hardware.

Key Terminology

IDE (UDMA mode 4)
A Parallel ATA transfer mode using Ultra DMA protocol with a maximum throughput of about 66.7 MB/s, requiring an 80-conductor IDE cable.
IDE (PIO mode 4)
A Programmed Input/Output timing mode where the CPU controls data transfers, with a theoretical throughput of about 16.7 MB/s.
Ultra DMA/66 (ATA-4)
Another name for IDE (UDMA mode 4), referring to its data transfer standard and theoretical maximum speed.

Quick Knowledge Check

What is the maximum theoretical throughput of IDE (UDMA mode 4)?
Which IDE mode relies on CPU-driven transfers?
Why is an 80-conductor IDE cable important?

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