[Bug 599255] Re: dmraid fails to read promise RAID sector count larger than 32-bits

[TJ]

Due to this issue being brought to IRC #ubuntu I did some background
research to try to confirm Danny's theory about sector-size.

So far the best resource I've found in the Promise Knowledge base
(kb.promise.com) is:

https://kb.promise.com/thread/how-do-i-create-an-array-larger-than-2tb-
for-windows-xp-or-windows-2000-32-bit-operating-systems/

This page contains the following table:

For this logical drive size    Select this sector size

Up to 16 TB                    4096 bytes (4 KB)
Up to 8 TB                     2048 bytes (2 KB)
Up to 4 TB                     1024 bytes (1 KB)
Up to 2 TB                     512 bytes (512 B) 

The page intro says:

"This application note deals with a specific application for VTrak
M-Class and E-Class in a Windows 2000/WinXP 32-bit OS environment."

>From fragments in other Promise KB articles I do think this is the
formula the Promise Fastrak Windows drivers follow so might be a basis
for a permanent and reliable fix.

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https://bugs.launchpad.net/bugs/599255

Title:
  dmraid fails to read promise RAID sector count larger than 32-bits

Status in dmraid package in Ubuntu:
  Triaged
Status in Baltix:
  New
Status in dmraid package in Fedora:
  New

Bug description:
  I have two amd sb7*** motherbord. I tryed two case.

  I use raid0(1.5TB x 3=4.5TB) by bios(SB7*0).

  I partitioned two array. 2.0TB(A) and 2.5TB(B).

                     win7-64
                     winxp32    ubuntu10.4 /fedora13
  ------------------------------------------------------------------
  raid-A 2.0TB   ok              ok          all capacity OK
  raid-B 2.5TB   ok (all)       no*1      only 300GB(NG)
  ------------------------------------------------------------------
  *1=ubuntu knows only 300gb. fedora too.

  ubuntu x64/Fedora13 x64,by DMRAID

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