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kern/48870: Problem with disks larger than 2 TB in Xen
>Synopsis: Problem with disks larger than 2 TB in Xen
>Arrival-Date: Wed Jun 04 18:45:00 +0000 2014
>Originator: Brian Marcotte
Public Access Networks, Corp.
NetBSD backup3.nyc.access.net 6.1.4 NetBSD 6.1.4 (PANIX-XEN-STD) #1: Tue Jun 3
12:04:23 EDT 2014
I'm having a problem with virtual disks larger than 2 TB.
A 3 TB virtual disk probes correctly:
xbd12: 3072 GB, 512 bytes/sect x 6442450944 sectors
read/write appears to work correctly against the whole disk.
The problem is that the disklabel/gpt programs think the size is the
size modulo 2 TB. I would expect disklabel to max out at 2 TB, but in
this example, it's sees a 1 TB disk. So does gpt.
It looks like something is returning the size as a 32 bit number.
My dom0 is linux, and both dom0 and domU are 32 bit. Xen is 64 bit.
Give a greater than 2 TB disk to a NetBSD/xen 32-bit domU. Try to
use "gpt" to partition the disk.
A sparse file is fine if actual large disks are not available.
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