[ros-kernel] install problem

[Mike Nordell]

Hartmut Birr wrote:

> Windows (NT 4.0 and XP) doesn't assign an arc path to the ZIP drive.

That's interesting. If there is a media in it at startup, I would almost
have expected rdisk(n)partition(4) to be valid (IIRC that's the default
layout of Iomega-formatted Zip-disks). I sure was able to boot NT (4 I
think) from a SCSI-Jaz, and I would have expected the "bootability" of an
ATA-device to be even higher.

> But XP does see much more partitions than NT.

This can probably be explained by changes in behaviour of
IOCTL_DISK_GET_DRIVE_LAYOUT. F.ex. on NT5 it returns not only the recognized
partitions, but also the "container" of extended partition. Say you had one
normal primary partition, one extended partition, and one logical volume in
the latter, on a normal n/63/255 disk. You would then get something like

Partition0 - the primary partition
  sect: 63..n1. Type=6. RecognizedPartition = true.
Partition1 - the extended "container"
  sect: n1..EOD. Type=15. RecognizedPartition = false
Partition3 - the volume in the extended partn.
  sect: n1+63..EOD. Type=6

For probably a better explanation, you could try the attached src.

/Mike
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