disconnect and reconnect with *-f raw* option... qemu-nbd --connect /dev/nbd0* --format=raw* /home/test/test.3.5.1b.debug/ test.3.5.1b.debug.raw
Le mar. 4 déc. 2018 à 14:32, ramakanth varala <ramakanth.var...@gmail.com> a écrit : > [root@localhost ~]# file > /home/test/test.3.5.1b.debug/test.3.5.1b.debug.raw > /home/test/test.3.5.1b.debug/test.3.5.1b.debug.raw: x86 boot sector; > partition 1: ID=0x83, starthead 1, startsector 63, 208782 sectors; > partition 2: ID=0x83, starthead 254, startsector 41913585, 16065 sectors, > code offset 0x48 > > > On Tue, Dec 4, 2018 at 6:48 PM Pascal <patate...@gmail.com> wrote: > >> the partition does not appear and so, cannot be mounted. >> moreover, if it appeared, it would have to be formatted before it could >> be mounted... >> >> what is the result of the "file /home/test/test.3.5.1b.debug/ >> test.3.5.1b.debug.raw" command ? >> >> Le mar. 4 déc. 2018 à 13:51, ramakanth varala <ramakanth.var...@gmail.com> >> a écrit : >> >>> Hi Pascal.. >>> >>> this works fine .... >>> >>> [root@localhost ~]# qemu-nbd --connect /dev/nbd0 >>> /home/test/test.3.5.1b.debug/test.3.5.1b.debug.raw >>> >>> after this when i try to do mount like below...it fails.. >>> >>> >>> [root@localhost ~]# mount /dev/nbd0p1 >>> /home/test/test.3.5.1b.debug/mnt/boot/ >>> mount: special device /dev/nbd0p1 does not exist >>> >>> but fdisk -l shows me this.. >>> >>> >>> [root@localhost ~]# fdisk -l /dev/nbd0 >>> >>> Disk /dev/nbd0: 21.4 GB, 21474836480 bytes >>> 255 heads, 63 sectors/track, 2610 cylinders >>> Units = cylinders of 16065 * 512 = 8225280 bytes >>> >>> Device Boot Start End Blocks Id System >>> /dev/nbd0p1 1 13 104391 83 Linux >>> /dev/nbd0p2 2610 2610 8032+ 83 Linux >>> >>> >>> Hope we have some way ..which i can mount to partition . >>> >>> Thanks >>> Rama Kanth >>> >>> >>> On Tue, Dec 4, 2018 at 5:07 PM Pascal <patate...@gmail.com> wrote: >>> >>>> # qemu-nbd --connect */dev/nbd0* /home/test/test.3.5.1b.debug/ >>>> test.3.5.1b.debug.raw >>>> >>>> Le mar. 4 déc. 2018 à 12:32, ramakanth varala < >>>> ramakanth.var...@gmail.com> a écrit : >>>> >>>>> Hi Pascal.. >>>>> >>>>> I tried like below.. >>>>> >>>>> [root@localhost ~]# qemu-nbd -d /dev/nbd0 >>>>> /dev/nbd0 disconnected >>>>> >>>>> [root@localhost ~]# qemu-nbd --connect /dev/nbd0p1 >>>>> /home/test/test.3.5.1b.debug/test.3.5.1b.debug.raw >>>>> qemu-nbd: Could not access '/dev/nbd0p1': No such file or directory >>>>> >>>>> >>>>> On Tue, Dec 4, 2018 at 4:55 PM ramakanth varala < >>>>> ramakanth.var...@gmail.com> wrote: >>>>> >>>>>> first time i got below.. >>>>>> >>>>>> [root@localhost ~]# kpartx -a /dev/ndb0 >>>>>> failed to stat() /dev/ndb0 >>>>>> >>>>>> from second time onwards like below.. >>>>>> >>>>>> [root@localhost ~]# kpartx -a /dev/nbd0 >>>>>> device-mapper: resume ioctl failed: Invalid argument >>>>>> >>>>>> >>>>>> On Tue, Dec 4, 2018 at 4:23 PM Jan Schermer <j...@schermer.cz> wrote: >>>>>> >>>>>>> Partigion is missing :-) >>>>>>> try: >>>>>>> kpartx -a /dev/ndb0 >>>>>>> >>>>>>> >>>>>>> > On 4 Dec 2018, at 11:35, ramakanth varala < >>>>>>> ramakanth.var...@gmail.com> wrote: >>>>>>> > >>>>>>> > Hi Pascal.. >>>>>>> > >>>>>>> > yes its RW ... >>>>>>> > >>>>>>> > [root@localhost ~]# fdisk -l /dev/nbd0 >>>>>>> > >>>>>>> > Disk /dev/nbd0: 21.4 GB, 21474836480 bytes >>>>>>> > 255 heads, 63 sectors/track, 2610 cylinders >>>>>>> > Units = cylinders of 16065 * 512 = 8225280 bytes >>>>>>> > >>>>>>> > Device Boot Start End Blocks Id System >>>>>>> > /dev/nbd0p1 1 13 104391 83 Linux >>>>>>> > /dev/nbd0p2 2610 2610 8032+ 83 Linux >>>>>>> > >>>>>>> > [root@localhost ~]# ls -ltr /dev/nbd0* >>>>>>> > brw-r----- 1 root disk 43, 0 Dec 4 11:06 /dev/nbd0 >>>>>>> > >>>>>>> > [root@localhost ~]# mount /dev/nbd0p1 >>>>>>> /home/test/test.3.5.1b.debug/mnt/boot/ >>>>>>> > mount: special device /dev/nbd0p1 does not exist >>>>>>> > >>>>>>> > [root@localhost ~]# cat /proc/partitions >>>>>>> > major minor #blocks name >>>>>>> > >>>>>>> > 8 0 62914560 sda >>>>>>> > 8 1 104391 sda1 >>>>>>> > 8 2 62806117 sda2 >>>>>>> > 253 0 56655872 dm-0 >>>>>>> > 253 1 6127616 dm-1 >>>>>>> > 253 2 104391 dm-2 >>>>>>> > 253 3 20860402 dm-3 >>>>>>> > >>>>>>> > >>>>>>> > --Not sure..what's missing.. >>>>>>> > >>>>>>> > Thanks >>>>>>> > Rama Kanth >>>>>>> > >>>>>>> > On Tue, Dec 4, 2018 at 3:07 PM Pascal <patate...@gmail.com> wrote: >>>>>>> > >>>>>>> >> hi, >>>>>>> >> >>>>>>> >> you left fdisk without saving the changes (w before q), so there >>>>>>> can't be >>>>>>> >> two partitions. >>>>>>> >> on the other hand, we should find the existing partition... >>>>>>> >> there is a strange warning when fdisk starts: what is on the over >>>>>>> side of >>>>>>> >> nbd0 ? >>>>>>> >> is /dev/nbd0 rw ? >>>>>>> >> if you can't re-read the partitions table, can you disconnect >>>>>>> /dev/nbd0 and >>>>>>> >> then reconnect it ? >>>>>>> >> >>>>>>> >> >>>>>>> >> Le lun. 3 déc. 2018 à 16:17, ramakanth varala < >>>>>>> ramakanth.var...@gmail.com> >>>>>>> >> a écrit : >>>>>>> >> >>>>>>> >>> Hi , >>>>>>> >>> >>>>>>> >>> I tried below steps .. still with some errors.. >>>>>>> >>> >>>>>>> >>> >>>>>>> >>> [root@localhost ~]# fdisk /dev/nbd0 >>>>>>> >>> >>>>>>> >>> The number of cylinders for this disk is set to 2610. >>>>>>> >>> There is nothing wrong with that, but this is larger than 1024, >>>>>>> >>> and could in certain setups cause problems with: >>>>>>> >>> 1) software that runs at boot time (e.g., old versions of LILO) >>>>>>> >>> 2) booting and partitioning software from other OSs >>>>>>> >>> (e.g., DOS FDISK, OS/2 FDISK) >>>>>>> >>> >>>>>>> >>> Command (m for help): n >>>>>>> >>> Command action >>>>>>> >>> e extended >>>>>>> >>> p primary partition (1-4) >>>>>>> >>> p >>>>>>> >>> Partition number (1-4): 1 >>>>>>> >>> Partition 1 is already defined. Delete it before re-adding it. >>>>>>> >>> >>>>>>> >>> Command (m for help): d >>>>>>> >>> Partition number (1-4): 1 >>>>>>> >>> >>>>>>> >>> Command (m for help): d >>>>>>> >>> Selected partition 2 >>>>>>> >>> >>>>>>> >>> Command (m for help): p >>>>>>> >>> >>>>>>> >>> Disk /dev/nbd0: 21.4 GB, 21474836480 bytes >>>>>>> >>> 255 heads, 63 sectors/track, 2610 cylinders >>>>>>> >>> Units = cylinders of 16065 * 512 = 8225280 bytes >>>>>>> >>> >>>>>>> >>> Device Boot Start End Blocks Id System >>>>>>> >>> >>>>>>> >>> Command (m for help): n >>>>>>> >>> Command action >>>>>>> >>> e extended >>>>>>> >>> p primary partition (1-4) >>>>>>> >>> p >>>>>>> >>> Partition number (1-4): 1 >>>>>>> >>> First cylinder (1-2610, default 1): >>>>>>> >>> Using default value 1 >>>>>>> >>> Last cylinder or +size or +sizeM or +sizeK (1-2610, default >>>>>>> 2610): 4 >>>>>>> >>> >>>>>>> >>> Command (m for help): n >>>>>>> >>> Command action >>>>>>> >>> e extended >>>>>>> >>> p primary partition (1-4) >>>>>>> >>> p >>>>>>> >>> Partition number (1-4): 2 >>>>>>> >>> First cylinder (5-2610, default 5): >>>>>>> >>> Using default value 5 >>>>>>> >>> Last cylinder or +size or +sizeM or +sizeK (5-2610, default >>>>>>> 2610): >>>>>>> >>> Using default value 2610 >>>>>>> >>> >>>>>>> >>> Command (m for help): p >>>>>>> >>> >>>>>>> >>> Disk /dev/nbd0: 21.4 GB, 21474836480 bytes >>>>>>> >>> 255 heads, 63 sectors/track, 2610 cylinders >>>>>>> >>> Units = cylinders of 16065 * 512 = 8225280 bytes >>>>>>> >>> >>>>>>> >>> Device Boot Start End Blocks Id System >>>>>>> >>> /dev/nbd0p1 1 4 32098+ 83 Linux >>>>>>> >>> /dev/nbd0p2 5 2610 20932695 83 Linux >>>>>>> >>> >>>>>>> >>> Command (m for help): q >>>>>>> >>> >>>>>>> >>> [root@localhost ~]# blockdev --rereadpt /dev/nbd0 >>>>>>> >>> BLKRRPART: Invalid argument >>>>>>> >>> [root@localhost ~]# ls /dev/nbd0 >>>>>>> >>> /dev/nbd0 >>>>>>> >>> [root@localhost ~]# ls /dev/nbd0* >>>>>>> >>> /dev/nbd0 >>>>>>> >>> >>>>>>> >>> >>>>>>> >>> >>>>>>> >>> Thanks >>>>>>> >>> Rama Kanth >>>>>>> >>> >>>>>>> >>> On Fri, Nov 30, 2018 at 6:48 PM Pascal <patate...@gmail.com> >>>>>>> wrote: >>>>>>> >>> >>>>>>> >>>> do not create nodes manually but with fdisk on nbd0 : >>>>>>> >>>> >>>>>>> >>>> # fdisk /dev/nbd0 >>>>>>> >>>> ## now create your partitions in fdisk >>>>>>> >>>> ## use w to write changes and q to quit fdisk >>>>>>> >>>> >>>>>>> >>>> # blocdev --rereadpt /dev/nbd0 >>>>>>> >>>> >>>>>>> >>>> # ls /dev/nbd0* >>>>>>> >>>> ## you will now have /dev/nbd0, /dev/nbd0p1 and /dev/nbd0p2 >>>>>>> >>>> >>>>>>> >>>> if this is not the case while the fdisk command ended without >>>>>>> error : >>>>>>> >>>> >>>>>>> >>>> # sync >>>>>>> >>>> # qemu-nbd -d /dev/nbd0 >>>>>>> >>>> # qemu-nbd -c /dev/nbd0 /the/target >>>>>>> >>>> >>>>>>> >>>> >>>>>>> >>>> Le ven. 30 nov. 2018 à 14:04, ramakanth varala < >>>>>>> >>>> ramakanth.var...@gmail.com> >>>>>>> >>>> a écrit : >>>>>>> >>>> >>>>>>> >>>>> Hi Pascal & Jakob, >>>>>>> >>>>> >>>>>>> >>>>> I started from first . >>>>>>> >>>>> >>>>>>> >>>>> I created manully the partitions as below >>>>>>> >>>>> >>>>>>> >>>>> 27 mknod /dev/nbd0p1 b 1 4 >>>>>>> >>>>> 28 mknod /dev/nbd0p2 b 1 4 >>>>>>> >>>>> >>>>>>> >>>>> still in /proc/partitions i don't see any info , it shows as >>>>>>> below >>>>>>> >>>>> >>>>>>> >>>>> [root@localhost ~]# cat /proc/partitions >>>>>>> >>>>> major minor #blocks name >>>>>>> >>>>> >>>>>>> >>>>> 8 0 62914560 sda >>>>>>> >>>>> 8 1 104391 sda1 >>>>>>> >>>>> 8 2 62806117 sda2 >>>>>>> >>>>> 253 0 56655872 dm-0 >>>>>>> >>>>> 253 1 6127616 dm-1 >>>>>>> >>>>> >>>>>>> >>>>> [root@localhost ~]# fdisk -l /dev/nbd0 >>>>>>> >>>>> >>>>>>> >>>>> Disk /dev/nbd0: 21.4 GB, 21474836480 bytes >>>>>>> >>>>> 255 heads, 63 sectors/track, 2610 cylinders >>>>>>> >>>>> Units = cylinders of 16065 * 512 = 8225280 bytes >>>>>>> >>>>> >>>>>>> >>>>> Device Boot Start End Blocks Id System >>>>>>> >>>>> /dev/nbd0p1 * 1 13 104391 83 Linux >>>>>>> >>>>> /dev/nbd0p2 14 2610 20860402+ 8e >>>>>>> Linux LVM >>>>>>> >>>>> >>>>>>> >>>>> >>>>>>> >>>>> when i try for mount , i see below error >>>>>>> >>>>> >>>>>>> >>>>> >>>>>>> >>>>> [root@localhost ~]# mount /dev/nbd0p1 >>>>>>> >>>>> /home/test/test.3.5.1b.debug/mnt/boot >>>>>>> >>>>> mount: you must specify the filesystem type >>>>>>> >>>>> >>>>>>> >>>>> i tried to give file system type as below, still issues. >>>>>>> >>>>> >>>>>>> >>>>> [root@localhost ~]# mount -t ext3 /dev/nbd0p1 >>>>>>> >>>>> /home/test/test.3.5.1b.debug/mnt/boot >>>>>>> >>>>> mount: wrong fs type, bad option, bad superblock on >>>>>>> /dev/nbd0p1, >>>>>>> >>>>> missing codepage or other error >>>>>>> >>>>> In some cases useful info is found in syslog - try >>>>>>> >>>>> dmesg | tail or so >>>>>>> >>>>> >>>>>>> >>>>> >>>>>>> >>>>> Any inputs would be really helpfull.. >>>>>>> >>>>> >>>>>>> >>>>> >>>>>>> >>>>> Thanks >>>>>>> >>>>> Rama Kanth >>>>>>> >>>>> >>>>>>> >>>>> On Fri, Nov 30, 2018 at 1:50 PM Pascal <patate...@gmail.com> >>>>>>> wrote: >>>>>>> >>>>> >>>>>>> >>>>>> restart from zero if possible... >>>>>>> >>>>>> >>>>>>> >>>>>> # qemu-nbd -d /dev/nbd0 >>>>>>> >>>>>> # modprobe -rv nbd >>>>>>> >>>>>> >>>>>>> >>>>>> # modprobe nbd >>>>>>> >>>>>> # qemu-nbd -c /dev/nbd0 /the/file >>>>>>> >>>>>> # blockdev --rereadpt /dev/nbd0 >>>>>>> >>>>>> # fdisk -l /dev/nbd0 >>>>>>> >>>>>> # mount /dev/nbd0p1 /mount/point >>>>>>> >>>>>> >>>>>>> >>>>>> Le jeu. 29 nov. 2018 à 17:32, Jakob Bohm < >>>>>>> jb-gnumli...@wisemo.com> a >>>>>>> >>>>>> écrit : >>>>>>> >>>>>> >>>>>>> >>>>>>> Check >>>>>>> >>>>>>> >>>>>>> >>>>>>> cat /proc/partitions >>>>>>> >>>>>>> >>>>>>> >>>>>>> If the partitions are not listed there, the kernel does not >>>>>>> >>>>>>> recognize them, perhaps the kernel doesn't recognize that >>>>>>> >>>>>>> nbd0 is a "partitionable disk", and thus does not create the >>>>>>> >>>>>>> internal nbd0p1 and ndb0p2 devices. >>>>>>> >>>>>>> >>>>>>> >>>>>>> If the partitions are listed there, you just need to create >>>>>>> the >>>>>>> >>>>>>> actual /dev/nbd0p1 and /dev/nbd0p2 file names with mknod or >>>>>>> >>>>>>> figure out why your "/dev/" management software (maybe udev, >>>>>>> >>>>>>> maybe something better) doesn't do that for you. >>>>>>> >>>>>>> >>>>>>> >>>>>>> On 29/11/2018 12:46, ramakanth varala wrote: >>>>>>> >>>>>>>> Still with some errors.. >>>>>>> >>>>>>>> >>>>>>> >>>>>>>> [root@localhost ~]# kpartx -a /dev/nbd0 >>>>>>> >>>>>>>> read error, sector 0 >>>>>>> >>>>>>>> read error, sector 1 >>>>>>> >>>>>>>> read error, sector 29 >>>>>>> >>>>>>>> [root@localhost ~]# ls /dev/nbd >>>>>>> >>>>>>>> nbd0 nbd1 nbd10 nbd11 nbd12 nbd13 nbd14 nbd15 nbd2 >>>>>>> >> nbd3 >>>>>>> >>>>>>> nbd4 >>>>>>> >>>>>>>> nbd5 nbd6 nbd7 nbd8 nbd9 >>>>>>> >>>>>>>> >>>>>>> >>>>>>>> >>>>>>> >>>>>>>> >>>>>>> >>>>>>>> On Thu, Nov 29, 2018 at 4:22 PM Nerijus Baliūnas < >>>>>>> >>>>>>>> neri...@users.sourceforge.net> wrote: >>>>>>> >>>>>>>> >>>>>>> >>>>>>>>> Please try kpartx -a /dev/nbd0 >>>>>>> >>>>>>>>> >>>>>>> >>>>>>>>> 2018-11-29 12:38, ramakanth varala rašė: >>>>>>> >>>>>>>>>> thanks for the reply .. >>>>>>> >>>>>>>>>> >>>>>>> >>>>>>>>>> But i get below error when i do .. >>>>>>> >>>>>>>>>> >>>>>>> >>>>>>>>>> >>>>>>> >>>>>>>>>> [root@localhost ~]# partx -a /dev/nbd0 >>>>>>> >>>>>>>>>> HDIO_GETGEO: Inappropriate ioctl for device >>>>>>> >>>>>>>>>> >>>>>>> >>>>>>>>>> On Thu, Nov 29, 2018 at 4:04 PM Nerijus Baliūnas < >>>>>>> >>>>>>>>>> neri...@users.sourceforge.net> wrote: >>>>>>> >>>>>>>>>> >>>>>>> >>>>>>>>>>> 2018-11-29 12:10, ramakanth varala rašė: >>>>>>> >>>>>>>>>>>> [root@localhost ~]# mount /dev/nbd0p1 >>>>>>> >>>>>> /home/test.1.3.debug/mnt/boot >>>>>>> >>>>>>>>>>>> mount: special device /dev/nbd0p1 does not exist >>>>>>> >>>>>>>>>>> partx -a /dev/nbd0 >>>>>>> >>>>>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> Enjoy >>>>>>> >>>>>>> >>>>>>> >>>>>>> Jakob >>>>>>> >>>>>>> -- >>>>>>> >>>>>>> Jakob Bohm, CIO, Partner, WiseMo A/S. >>>>>>> https://www.wisemo.com >>>>>>> >>>>>>> Transformervej 29, 2860 Søborg, Denmark. Direct +45 31 13 >>>>>>> 16 10 >>>>>>> >>>>>>> This public discussion message is non-binding and may contain >>>>>>> >> errors. >>>>>>> >>>>>>> WiseMo - Remote Service Management for PCs, Phones and >>>>>>> Embedded >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>>> >>>>> >>>>>>> >>>> >>>>>>> >>> >>>>>>> >> >>>>>>> >>>>>>>
