diff --git a/LDP/guide/docbook/Tuning-Linux/disk.sgml b/LDP/guide/docbook/Tuning-Linux/disk.sgml
index dfb37cf8..822126ee 100644
--- a/LDP/guide/docbook/Tuning-Linux/disk.sgml
+++ b/LDP/guide/docbook/Tuning-Linux/disk.sgml
@@ -49,8 +49,8 @@
       <para>
         The history of SCSI drives starts not with large servers
         running multibillion dollar companies, but as its name
-        implies, with small systems.  SCSI had its first
-        real implementation on early Apple Macintosh systems.
+        implies, with small systems.  SCSI had one of its first
+        implementation on the Apple Macintosh Plus systems.
         SCSI was made to be a general purpose interface, supporting
         not only hard drives, but scanners, CD-ROMs, serial ports,
         and other devices off of one common bus.  Cables were
@@ -58,7 +58,7 @@
         fast for its time, reaching a maximum of 4MB per second.
       </para>
       <para>
-        SCSI was eventually picked up by server vendors, such as
+        SCSI was picked up by server vendors, such as
         Sun and IBM, since it created a common way for servers
         to share devices.  Its advantages in design made it very
         well suited to have multiple devices on the same bus
@@ -105,8 +105,8 @@
         and devices like scanners.  In addition, when an IDE drive
         is asked to do something, that IDE bus is locked while
         the drive processes the request.  IDE devices are usually limited
-        to two devices per bus, and two busses per system.  Each bus
-        requires one IRQ line.
+        to two devices per bus, but can have multiple busses per system.
+	Most motherboards come with two IDE busses standard.
       </para>
       <para>
         Burst performance of IDE drives gets close to that of SCSI,