Support >2TB Volume in Scsi Miniport

NTDEV
1

Hi all,

Can the 64 bit Windows XP support disk larger than 2TB? The structure
READ_CAPACITY_DATA still has the field LogicalBlockAddress as a 32 bits
field. I think I used the right file for the 64 bit compiler.
Any comments will be appreciated.

Vu

2

Two parts to this:

  1. SCSI block numbers are limited to 32 bits (that is until the very
    recent SBC-2) spec. The current windows stack only transmits 32 bit
    block numbers (as it uses SCSI CDBs).
  2. MBR disks are also limited to 32 bits.

The way to fix this is

  1. use new SBC-2 commands for devices that support them
  2. use GPT when dealing with >2TB LUNs

Look for an announcement shortly :wink:

-----Original Message-----
From: Vu Nguyen [mailto:xxxxx@pacificdigital.com]
Sent: Thursday, September 23, 2004 11:12 AM
Subject: Support >2TB Volume in Scsi Miniport

Hi all,

Can the 64 bit Windows XP support disk larger than 2TB? The structure
READ_CAPACITY_DATA still has the field LogicalBlockAddress as a 32 bits
field. I think I used the right file for the 64 bit compiler.
Any comments will be appreciated.

Vu