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Re: [Qemu-devel] [PATCH] vmdk: Fix format specific information (create t
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] [PATCH] vmdk: Fix format specific information (create type) for streamOptimized |
Date: |
Thu, 23 Jan 2014 15:42:32 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Am 23.01.2014 um 08:10 hat Fam Zheng geschrieben:
> Previously the field is wrong:
>
> $ ./qemu-img create -f vmdk -o subformat=streamOptimized /tmp/a.vmdk 1G
>
> $ ./qemu-img info /tmp/a.vmdk
> image: /tmp/a.vmdk
> file format: vmdk
> virtual size: 1.0G (1073741824 bytes)
> disk size: 12K
> Format specific information:
> cid: 1390460459
> parent cid: 4294967295
> >>> create type: monolithicSparse
> <snip>
>
> Signed-off-by: Fam Zheng <address@hidden>
Thanks, applied to the block branch.
By the way, I tried converting a raw image to streamOptimised and got
this:
qemu-img: Could not write to allocated cluster for streamOptimized
qemu-img: error while writing sector 63: Input/output error
The problem seems to be that qemu-img tries to be clever and doesn't
write out sparse parts, which breaks up the first cluster into multiple
write requests. Adding -S 64 makes it work. Should we change something
to get a working default?
Kevin