Hi!
Short:
{{
L.M.>>> Removing our ATA patches, on the other hand, results in a huge
L.M.>>> performance loss. This is because the root file system is managed by the
L.M.>>> ATA driver, which is emulated under Hyper-V.
VVM>> Place on IDE disk only "\boot" ( and bootloader), other on SCSI .
+
VVM>> Disable both primary and secondary ATA controller prevent use CD-ROM
device in VM ( guest)
VVM>> Because "synthetic storage driver" not handle CD-ROM devices
May be temporary disable BlkVSC (paravirtual IDE) functional?
And enable [imm.]after implement work on Hyper-V both CD-ROM and ATA disks
==
--- 000\hv_storvsc_drv_freebsd.c Wed Apr 10 06:18:58 2013
+++ hv_storvsc_drv_freebsd.c Wed May 08 11:59:06 2013
. . .
* Using the type GUID, determine if this is a StorVSC (paravirtual
* SCSI or BlkVSC (paravirtual IDE) device.
. . .
if (!memcmp(p, &gBlkVscDeviceType, sizeof(hv_guid))) {
- return DRIVER_BLKVSC;
+ /* TODO: enable after implement work on Hyper-V both CD-ROM and ATA disks
+ * return DRIVER_BLKVSC;
+ */
+ return (DRIVER_UNKNOWN);
. . .
==
}}
Full:
On Tue, May 7, 2013 at 12:40 AM, Victor Miasnikov <vvm (at) tut.by> wrote:
L.M.>> ==
L.M.>> . . .
L.M.>> On 23.04.2013 17:07, Larry Melia wrote:
L.M.>> . . .
L.M.>>
L.M.>>> Removing our ATA patches, on the other hand, results in a huge
L.M.>>> performance loss. This is because the root file system is managed by the
L.M.>>> ATA driver, which is emulated under Hyper-V.
L.M.>>>
L.M.>> ==
VVM>>
VVM>> Place on IDE disk only "\boot" ( and bootloader), other on SCSI .
VVM>>
prevent default OS driver from attaching to emulated ATA controller when
Hyper-V
VVM>>
VVM>> Disable both primary and secondary ATA controller prevent use CD-ROM
device in VM ( guest)
VVM>>
VVM>> Because "synthetic storage driver" not handle CD-ROM devices
VVM>> ( IMHO, even more: Hyper-V host work with CD-ROM only as "PCI bus" device)
L.M.>Regarding the CD-ROM drive, there's a known problem with CD-ROM support and using our synthetic storage driver.
L.M.>At the moment, it's not supported correctly on FreeBSD,
L.M.>but . . . there's a workaround ( details skipped by VVM, {= not all simply , "long story" ) ,
L.M.>which we will try to get working on FreeBSD.
L.M.>This will be addressed shortly, but . . . ( skipped by VVM ) .
May be temporary disable BlkVSC (paravirtual IDE) functional?
And enable after implement work on Hyper-V both CD-ROM and ATA disks
==
--- 000\hv_storvsc_drv_freebsd.c Wed Apr 10 06:18:58 2013
+++ hv_storvsc_drv_freebsd.c Wed May 08 11:59:06 2013
@@ -1449,22 +1449,25 @@
/**
* @brief Determine type of storage device from GUID
*
* Using the type GUID, determine if this is a StorVSC (paravirtual
* SCSI or BlkVSC (paravirtual IDE) device.
*
* @param dev a device
* returns an enum
*/
static enum hv_storage_type
storvsc_get_storage_type(device_t dev)
{
const char *p = vmbus_get_type(dev);
if (!memcmp(p, &gBlkVscDeviceType, sizeof(hv_guid))) {
- return DRIVER_BLKVSC;
+ /* TODO: enable after implement work on Hyper-V both CD-ROM and ATA
disks
+ * return DRIVER_BLKVSC;
+ */
+ return (DRIVER_UNKNOWN);
} else if (!memcmp(p, &gStorVscDeviceType, sizeof(hv_guid))) {
return DRIVER_STORVSC;
}
return (DRIVER_UNKNOWN);
}
==
Best regards, Victor Miasnikov
Blog: http://vvm.blog.tut.by/
P.S. Sorry, for code style -- is primary demo of _idea_
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