Re: [Qemu-block] [QEMU] [PATCH v2 0/8] Add Qemu to SeaBIOS LCHS interface

> On 14 Jun 2019, at 7:43, Gerd Hoffmann wrote: > > Hi, > >> Can there be a guest that will fail the MBR in such a way? Yes. >> Look at the following MBR partition table of a Windows XP guest in our >> production >> environment: >> >> Disk size in sectors: 16777216 >> >> Binary (only one

Re: [Qemu-block] [QEMU] [PATCH v2 0/8] Add Qemu to SeaBIOS LCHS interface

Hi, > Can there be a guest that will fail the MBR in such a way? Yes. > Look at the following MBR partition table of a Windows XP guest in our > production > environment: > > Disk size in sectors: 16777216 > > Binary (only one partition 16 bytes): 80 01 01 00 07 fe ff ff 3f 00 00 00 d5 > ea

Re: [Qemu-block] [QEMU] [PATCH v2 0/8] Add Qemu to SeaBIOS LCHS interface

> On 13 Jun 2019, at 12:38, Gerd Hoffmann wrote: > > Hi, > >> Yes they are pretty rare. >> Windows 2000 and Windows XP guests migrated from VMware to Qemu/KVM >> would not boot due to incorrect disk geometries (some had 32/56 spt instead >> of >> 56. Also number of heads was not entirely

Re: [Qemu-block] [QEMU] [PATCH v2 0/8] Add Qemu to SeaBIOS LCHS interface

Hi, > Yes they are pretty rare. > Windows 2000 and Windows XP guests migrated from VMware to Qemu/KVM > would not boot due to incorrect disk geometries (some had 32/56 spt instead of > 56. Also number of heads was not entirely correct) Ok. > > Why? Asking the user to deal with the mess is

Re: [Qemu-block] [QEMU] [PATCH v2 0/8] Add Qemu to SeaBIOS LCHS interface

typo: ddb.geometry.biosCylinders = “83257” * Sam > On 13 Jun 2019, at 10:41, Sam Eiderman wrote: > > > >> On 12 Jun 2019, at 22:18, Gerd Hoffmann > > wrote: >> >> On Wed, Jun 12, 2019 at 04:30:03PM +0300, Sam Eiderman wrote: >>> >>> On 12 Jun 2019, at 16:06,

Re: [Qemu-block] [QEMU] [PATCH v2 0/8] Add Qemu to SeaBIOS LCHS interface

> On 12 Jun 2019, at 22:18, Gerd Hoffmann wrote: > > On Wed, Jun 12, 2019 at 04:30:03PM +0300, Sam Eiderman wrote: >> >> >>> On 12 Jun 2019, at 16:06, Gerd Hoffmann wrote: >>> >>> On Wed, Jun 12, 2019 at 02:59:31PM +0300, Sam Eiderman wrote: v1: Non-standard logical

Re: [Qemu-block] [QEMU] [PATCH v2 0/8] Add Qemu to SeaBIOS LCHS interface

On Wed, Jun 12, 2019 at 04:30:03PM +0300, Sam Eiderman wrote: > > > > On 12 Jun 2019, at 16:06, Gerd Hoffmann wrote: > > > > On Wed, Jun 12, 2019 at 02:59:31PM +0300, Sam Eiderman wrote: > >> v1: > >> > >> Non-standard logical geometries break under QEMU. > >> > >> A virtual disk which

Re: [Qemu-block] [QEMU] [PATCH v2 0/8] Add Qemu to SeaBIOS LCHS interface

> On 12 Jun 2019, at 16:06, Gerd Hoffmann wrote: > > On Wed, Jun 12, 2019 at 02:59:31PM +0300, Sam Eiderman wrote: >> v1: >> >> Non-standard logical geometries break under QEMU. >> >> A virtual disk which contains an operating system which depends on >> logical geometries (consistent values

Re: [Qemu-block] [QEMU] [PATCH v2 0/8] Add Qemu to SeaBIOS LCHS interface

On Wed, Jun 12, 2019 at 02:59:31PM +0300, Sam Eiderman wrote: > v1: > > Non-standard logical geometries break under QEMU. > > A virtual disk which contains an operating system which depends on > logical geometries (consistent values being reported from BIOS INT13 > AH=08) will most likely break

[Qemu-block] [QEMU] [PATCH v2 0/8] Add Qemu to SeaBIOS LCHS interface

v1: Non-standard logical geometries break under QEMU. A virtual disk which contains an operating system which depends on logical geometries (consistent values being reported from BIOS INT13 AH=08) will most likely break under QEMU/SeaBIOS if it has non-standard logical geometries - for example