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Re: [Qemu-devel] [Important] Query regarding bdrv_co_discard
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [Important] Query regarding bdrv_co_discard |
Date: |
Thu, 4 Sep 2014 14:59:26 +0100 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Thu, Sep 04, 2014 at 05:56:53AM -0700, Sanjay Kumar2 wrote:
> Output of hdparam is below. Also let me know does network based protocol
> supports 'qcow2' format. As my block driver is network based. It is perfectly
> working for raw format. When I change the type='qcow2', then it is not
> working because bdrv_get_geometry() is returning 0. This I am talking about
> qemu-kvm-0.12.1.2.
>
> address@hidden ~]# hdparm -I /dev/sda
>
> /dev/sda:
> SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 00 00 00 00 20
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>
> ATA device, with non-removable media
> Standards:
> Likely used: 1
> Configuration:
> Logical max current
> cylinders 0 0
> heads 0 0
> sectors/track 0 0
> --
> Logical/Physical Sector size: 512 bytes
> device size with M = 1024*1024: 0 MBytes
> device size with M = 1000*1000: 0 MBytes
> cache/buffer size = unknown
I guess you are asking why hdparm reports 0 MB size?
Please post the qemu command-line (ps aux | grep qemu) so we know how
the guest is configured.
qcow2 works on non-file protocols (e.g. network).
Please keep discussion in this email thread and don't post comments
about this on my blog.
Stefan
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