Hello,
I''m not able to use tap:aio disk definitions with my HVM
domU''s. Is this
supposed to work on this version of Xen, or am I doing something wrong?
I''ve tried everything I can think of. file: works, but not tap:aio: ,
and I
understand that file: will cause OOMkiller if using NFS mounts and is
deprecated.
Likewise, tap:aio: for cdrom does not allow me to boot off of cdrom; file:
does work fine.
Furthermore, any time I use tap:aio, the bochs bios of the hvm domU shows
the hard disk size as 0 MBytes.
Any disk definition that I use that has tap:aio: gives the result either (if
tap:aio:/xen/foo/foo.img,xvda,w):
Booting from Hard Disk...
Boot from Hard Disk failed: could not read the boot disk
or (if specifying tap:aio:/xen/foo/foo.img,hda,w)
ata0 master: QEMU HARDDISK ATA-7 Hard-Disk (0 MBytes)
Boot from Hard Disk failed: could not read the boot disk
Host: CentOS 5.2 x86_64, kernel 2.6.18-92.1.6.el5xen
Xen version: 3.1.2-92.1.6.el5
xen_caps: xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p
hvm-3.0-x86_64
selinux: disabled for testing
domU: OS doesn''t appear to matter; domU OS won''t start loading
at all.
disk lines I''ve tried:
# disk recognized as 0/1 MB, can''t install
#disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,ioemu:sda,w",
"file:/xen/iso/Win2003r2_std_32bit.iso,hdc:cdrom,r" ]
#disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,sda,w",
"file:/xen/iso/Win2003r2_std_32bit.iso,hdc:cdrom,r" ]
#disk = [ "file:/xen/ausmsit05/ausmsit05.raw,hda,w",
"file:/xen/iso/Win2003r2_std_32bit.iso,hdc:cdrom,r" ]
#disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,sda1,w",
",hdc:cdrom,r" ]
#disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,xvda,w",
",hdc:cdrom,r" ]
#disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,hda:ioemu,w",
",hdc:cdrom,r"
]
#disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,ioemu:hda,w",
",hdc:cdrom,r"
]
#disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,ioemu:xvda,w",
"phy:/dev/scd0,ioemu:xvdc:cdrom,r" ]
# Boot from Hard Disk failed: could not read the boot disk
disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,hda,w",
"tap:aio:/xen/iso/win2003r2_std_32bit_disk1of2.iso,hdc:cdrom,r" ]
in the last example, this is the output of xm block-list ausmsit05 --long
(768
((backend-id 0)
(virtual-device 768)
(device-type disk)
(state 1)
(backend /local/domain/0/backend/tap/55/768)
)
)
(5632
((backend-id 0)
(virtual-device 5632)
(device-type cdrom)
(state 1)
(backend /local/domain/0/backend/tap/55/5632)
)
)
and this is from xend.log:
[2008-08-28 14:18:09 xend 3692] DEBUG (blkif:24) exception looking up device
number for hda: [Errno 2] No such file or directory:
''/dev/hda''
[2008-08-28 14:18:09 xend 3692] DEBUG (DevController:110) DevController:
writing {''backend-id'': ''0'',
''virtual-device'': ''768'',
''device-type'': ''disk'',
''state'': ''1'', ''backend'':
''/local/domain/0/backend/tap/55/768''} to /lo
cal/domain/55/device/vbd/768.
[2008-08-28 14:18:09 xend 3692] DEBUG (DevController:112) DevController:
writing {''domain'': ''ausmsit05'',
''frontend'':
''/local/domain/55/device/vbd/768'', ''format'':
''raw'', ''dev'': ''hda'',
''state'':
''1'', ''params'':
''aio:/xen/ausmsit05/ausmsit05.raw'', ''mode'':
''w'', ''online'':
''1'', ''frontend-id'': ''55'',
''type'': ''tap''} to /local/domain/0/b
ackend/tap/55/768.
[2008-08-28 14:18:09 xend 3692] DEBUG (blkif:24) exception looking up device
number for hdc: [Errno 2] No such file or directory:
''/dev/hdc''
[2008-08-28 14:18:09 xend 3692] DEBUG (DevController:110) DevController:
writing {''backend-id'': ''0'',
''virtual-device'': ''5632'',
''device-type'':
''cdrom'', ''state'': ''1'',
''backend'':
''/local/domain/0/backend/tap/55/5632''} to
/local/domain/55/device/vbd/5632.
[2008-08-28 14:18:09 xend 3692] DEBUG (DevController:112) DevController:
writing {''domain'': ''ausmsit05'',
''frontend'':
''/local/domain/55/device/vbd/5632'',
''format'': ''raw'', ''dev'':
''hdc'', ''state'':
''1'', ''params'':
''aio:/xen/iso/win2003r2_std_32bit_disk1of2.iso'',
''mode'': ''r'',
''online'': ''1'',
''frontend-id'': ''55'',
''type'': ''tap''} to /lo
cal/domain/0/backend/tap/55/5632.
Thank you in advance for any help you can offer.
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Hi, I got exactly the same problem for Xen 3.1.4, HVM-enabled, 64 bit Host, EL4. I have tried all the combinations as hda, sda etc but it didn''t work. Using hda does allows qemu to detect the disk though but it fails boot as well. The only difference is that rather than tap:io, I am using "phy" as my guest is installed in LVM. The rest of the thread could be followed here: http://lists.xensource.com/archives/html/xen-users/2008-08/msg00786.html I am also waiting to get some insight from a Xen expert to resolve this problem. Thanks, Omer On Thu, Aug 28, 2008 at 9:27 PM, - <debaan@gmail.com> wrote:> Hello, > > I''m not able to use tap:aio disk definitions with my HVM domU''s. Is this > supposed to work on this version of Xen, or am I doing something wrong? > I''ve tried everything I can think of. file: works, but not tap:aio: , and > I understand that file: will cause OOMkiller if using NFS mounts and is > deprecated. > > Likewise, tap:aio: for cdrom does not allow me to boot off of cdrom; file: > does work fine. > > Furthermore, any time I use tap:aio, the bochs bios of the hvm domU shows > the hard disk size as 0 MBytes. > > Any disk definition that I use that has tap:aio: gives the result either > (if tap:aio:/xen/foo/foo.img,xvda,w): > Booting from Hard Disk... > Boot from Hard Disk failed: could not read the boot disk > or (if specifying tap:aio:/xen/foo/foo.img,hda,w) > ata0 master: QEMU HARDDISK ATA-7 Hard-Disk (0 MBytes) > Boot from Hard Disk failed: could not read the boot disk > > Host: CentOS 5.2 x86_64, kernel 2.6.18-92.1.6.el5xen > Xen version: 3.1.2-92.1.6.el5 > xen_caps: xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p > hvm-3.0-x86_64 > selinux: disabled for testing > domU: OS doesn''t appear to matter; domU OS won''t start loading at all. > > disk lines I''ve tried: > # disk recognized as 0/1 MB, can''t install > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,ioemu:sda,w", > "file:/xen/iso/Win2003r2_std_32bit.iso,hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,sda,w", > "file:/xen/iso/Win2003r2_std_32bit.iso,hdc:cdrom,r" ] > #disk = [ "file:/xen/ausmsit05/ausmsit05.raw,hda,w", > "file:/xen/iso/Win2003r2_std_32bit.iso,hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,sda1,w", ",hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,xvda,w", ",hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,hda:ioemu,w", > ",hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,ioemu:hda,w", > ",hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,ioemu:xvda,w", > "phy:/dev/scd0,ioemu:xvdc:cdrom,r" ] > # Boot from Hard Disk failed: could not read the boot disk > disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,hda,w", > "tap:aio:/xen/iso/win2003r2_std_32bit_disk1of2.iso,hdc:cdrom,r" ] > > in the last example, this is the output of xm block-list ausmsit05 --long > (768 > ((backend-id 0) > (virtual-device 768) > (device-type disk) > (state 1) > (backend /local/domain/0/backend/tap/55/768) > ) > ) > (5632 > ((backend-id 0) > (virtual-device 5632) > (device-type cdrom) > (state 1) > (backend /local/domain/0/backend/tap/55/5632) > ) > ) > and this is from xend.log: > > [2008-08-28 14:18:09 xend 3692] DEBUG (blkif:24) exception looking up > device number for hda: [Errno 2] No such file or directory: ''/dev/hda'' > [2008-08-28 14:18:09 xend 3692] DEBUG (DevController:110) DevController: > writing {''backend-id'': ''0'', ''virtual-device'': ''768'', ''device-type'': > ''disk'', ''state'': ''1'', ''backend'': ''/local/domain/0/backend/tap/55/768''} to > /local/domain/55/device/vbd/768. > [2008-08-28 14:18:09 xend 3692] DEBUG (DevController:112) DevController: > writing {''domain'': ''ausmsit05'', ''frontend'': > ''/local/domain/55/device/vbd/768'', ''format'': ''raw'', ''dev'': ''hda'', ''state'': > ''1'', ''params'': ''aio:/xen/ausmsit05/ausmsit05.raw'', ''mode'': ''w'', ''online'': > ''1'', ''frontend-id'': ''55'', ''type'': ''tap''} to /local/domain/0/b > ackend/tap/55/768. > [2008-08-28 14:18:09 xend 3692] DEBUG (blkif:24) exception looking up > device number for hdc: [Errno 2] No such file or directory: ''/dev/hdc'' > [2008-08-28 14:18:09 xend 3692] DEBUG (DevController:110) DevController: > writing {''backend-id'': ''0'', ''virtual-device'': ''5632'', ''device-type'': > ''cdrom'', ''state'': ''1'', ''backend'': ''/local/domain/0/backend/tap/55/5632''} to > /local/domain/55/device/vbd/5632. > [2008-08-28 14:18:09 xend 3692] DEBUG (DevController:112) DevController: > writing {''domain'': ''ausmsit05'', ''frontend'': > ''/local/domain/55/device/vbd/5632'', ''format'': ''raw'', ''dev'': ''hdc'', ''state'': > ''1'', ''params'': ''aio:/xen/iso/win2003r2_std_32bit_disk1of2.iso'', ''mode'': > ''r'', ''online'': ''1'', ''frontend-id'': ''55'', ''type'': ''tap''} to /lo > cal/domain/0/backend/tap/55/5632. > > Thank you in advance for any help you can offer. > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >-- Omer ------------------------------------------------------- CERN -- European Organization for Nuclear Research, IT Department, CH-1211, Geneva 23, Switzerland Phone: +41 (0) 22 767 2224 Fax: +41 (0) 22 766 8683 E-mail : Omer.Khalid@cern.ch Homepage: http://cern.ch/Omer.Khalid _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Omer Khalid wrote:> Hi, > > I got exactly the same problem for Xen 3.1.4, HVM-enabled, 64 bit > Host, EL4. I have tried all the combinations as hda, sda etc but it > didn''t work. Using hda does allows qemu to detect the disk though but > it fails boot as well. > > The only difference is that rather than tap:io, I am using "phy" as my > guest is installed in LVM. The rest of the thread could be followed here: > http://lists.xensource.com/archives/html/xen-users/2008-08/msg00786.html > > I am also waiting to get some insight from a Xen expert to resolve > this problem.As I said earlier in one other thread, using file:/xxx/xx for hvms doesn''t have all the pitfalls that pv guests have while using it. The code is entirely different for storage handling with file:/ for pv and fv. So it''s safe to use file:/ for hvms while it''s not for PV. Until recently tap:aio is not supported for hvms, not sure whether this has changed in latest versions or not. --Sadique> > Thanks, > Omer > > On Thu, Aug 28, 2008 at 9:27 PM, - <debaan@gmail.com > <mailto:debaan@gmail.com>> wrote: > > Hello, > > I''m not able to use tap:aio disk definitions with my HVM domU''s. > Is this supposed to work on this version of Xen, or am I doing > something wrong? > I''ve tried everything I can think of. file: works, but not > tap:aio: , and I understand that file: will cause OOMkiller if > using NFS mounts and is deprecated. > > Likewise, tap:aio: for cdrom does not allow me to boot off of > cdrom; file: does work fine. > > Furthermore, any time I use tap:aio, the bochs bios of the hvm > domU shows the hard disk size as 0 MBytes. > > Any disk definition that I use that has tap:aio: gives the result > either (if tap:aio:/xen/foo/foo.img,xvda,w): > Booting from Hard Disk... > Boot from Hard Disk failed: could not read the boot disk > or (if specifying tap:aio:/xen/foo/foo.img,hda,w) > ata0 master: QEMU HARDDISK ATA-7 Hard-Disk (0 MBytes) > Boot from Hard Disk failed: could not read the boot disk > > Host: CentOS 5.2 x86_64, kernel 2.6.18-92.1.6.el5xen > Xen version: 3.1.2-92.1.6.el5 > xen_caps: xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 > hvm-3.0-x86_32p hvm-3.0-x86_64 > selinux: disabled for testing > domU: OS doesn''t appear to matter; domU OS won''t start loading at all. > > disk lines I''ve tried: > # disk recognized as 0/1 MB, can''t install > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,ioemu:sda,w", > "file:/xen/iso/Win2003r2_std_32bit.iso,hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,sda,w", > "file:/xen/iso/Win2003r2_std_32bit.iso,hdc:cdrom,r" ] > #disk = [ "file:/xen/ausmsit05/ausmsit05.raw,hda,w", > "file:/xen/iso/Win2003r2_std_32bit.iso,hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,sda1,w", > ",hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,xvda,w", > ",hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,hda:ioemu,w", > ",hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,ioemu:hda,w", > ",hdc:cdrom,r" ] > #disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,ioemu:xvda,w", > "phy:/dev/scd0,ioemu:xvdc:cdrom,r" ] > # Boot from Hard Disk failed: could not read the boot disk > disk = [ "tap:aio:/xen/ausmsit05/ausmsit05.raw,hda,w", > "tap:aio:/xen/iso/win2003r2_std_32bit_disk1of2.iso,hdc:cdrom,r" ] > > in the last example, this is the output of xm block-list ausmsit05 > --long > (768 > ((backend-id 0) > (virtual-device 768) > (device-type disk) > (state 1) > (backend /local/domain/0/backend/tap/55/768) > ) > ) > (5632 > ((backend-id 0) > (virtual-device 5632) > (device-type cdrom) > (state 1) > (backend /local/domain/0/backend/tap/55/5632) > ) > ) > and this is from xend.log: > > [2008-08-28 14:18:09 xend 3692] DEBUG (blkif:24) exception looking > up device number for hda: [Errno 2] No such file or directory: > ''/dev/hda'' > [2008-08-28 14:18:09 xend 3692] DEBUG (DevController:110) > DevController: writing {''backend-id'': ''0'', ''virtual-device'': > ''768'', ''device-type'': ''disk'', ''state'': ''1'', ''backend'': > ''/local/domain/0/backend/tap/55/768''} to > /local/domain/55/device/vbd/768. > [2008-08-28 14:18:09 xend 3692] DEBUG (DevController:112) > DevController: writing {''domain'': ''ausmsit05'', ''frontend'': > ''/local/domain/55/device/vbd/768'', ''format'': ''raw'', ''dev'': ''hda'', > ''state'': ''1'', ''params'': ''aio:/xen/ausmsit05/ausmsit05.raw'', > ''mode'': ''w'', ''online'': ''1'', ''frontend-id'': ''55'', ''type'': ''tap''} to > /local/domain/0/backend/tap/55/768. > [2008-08-28 14:18:09 xend 3692] DEBUG (blkif:24) exception looking > up device number for hdc: [Errno 2] No such file or directory: > ''/dev/hdc'' > [2008-08-28 14:18:09 xend 3692] DEBUG (DevController:110) > DevController: writing {''backend-id'': ''0'', ''virtual-device'': > ''5632'', ''device-type'': ''cdrom'', ''state'': ''1'', ''backend'': > ''/local/domain/0/backend/tap/55/5632''} to > /local/domain/55/device/vbd/5632. > [2008-08-28 14:18:09 xend 3692] DEBUG (DevController:112) > DevController: writing {''domain'': ''ausmsit05'', ''frontend'': > ''/local/domain/55/device/vbd/5632'', ''format'': ''raw'', ''dev'': ''hdc'', > ''state'': ''1'', ''params'': > ''aio:/xen/iso/win2003r2_std_32bit_disk1of2.iso'', ''mode'': ''r'', > ''online'': ''1'', ''frontend-id'': ''55'', ''type'': ''tap''} to > /local/domain/0/backend/tap/55/5632. > > Thank you in advance for any help you can offer. > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com <mailto:Xen-users@lists.xensource.com> > http://lists.xensource.com/xen-users > > > > > -- > Omer > > ------------------------------------------------------- > CERN -- European Organization for Nuclear > Research, IT Department, CH-1211, > Geneva 23, Switzerland > > Phone: +41 (0) 22 767 2224 > Fax: +41 (0) 22 766 8683 > E-mail : Omer.Khalid@cern.ch > Homepage: http://cern.ch/Omer.Khalid > ------------------------------------------------------------------------ > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
>Until > recently tap:aio is not supported for hvms, not sure whether this has > changed in latest versions or not.I booted an HVM guest with tap:aio in Xen 3.3 built from source on top of Ubuntu 8.04 Cheers, Todd -- Todd Deshane http://todddeshane.net check out our book: http://runningxen.com _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
>I booted an HVM guest with tap:aio in Xen 3.3 built from source on top of >Ubuntu 8.04Todd, Any chance of a post of your lsmod (or ubuntu equivalent) here so I could take the time to deduce what they all are and see if possibly I am missing any modules needed for it? After a source install of 3.3, none of the additional modules get loaded in CentOS 5.2x64 so it could be I am missing one that provides the needed functionality of it, as it is supported. jlc _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users