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Re: [Qemu-discuss] Issue related to mounting /dev/nbd0p1
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From: |
Pascal |
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Subject: |
Re: [Qemu-discuss] Issue related to mounting /dev/nbd0p1 |
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Date: |
Thu, 17 Jan 2019 14:19:32 +0100 |
hi,
your /home/pnsc/nsc.3.5.1b.debug/nsc.3.5.1b.debug.raw is a raw disk image,
is that right ?
before returning to nbd, is it possible to check with loop ?
# qemu-nbd -d /dev/nbd0
# modprobe -rv nbd
# fdisk -l /home/pnsc/nsc.3.5.1b.debug/nsc.3.5.1b.debug.raw
# modprobe -rv loop *# I assume/hope the module is not being used*
# modprobe -v loop max_part=16
# losetup -f /home/pnsc/nsc.3.5.1b.debug/nsc.3.5.1b.debug.raw
# losetup -l # theoretically /dev/loop0
# fdisk -l /dev/loop0 *# change loop0 if the theory is not respected*
# ls -l /dev/loop0* *# we should theoretically find out loop0p1 and
loop0p2*
# mount /dev/loop0p1 /mount/point
Le jeu. 17 janv. 2019 à 03:52, ramakanth varala <address@hidden>
a écrit :
> Hi ,
>
> I moved to RHEL 7.1 , now in my /proc/partitions i am able to see like
> below
>
>
> address@hidden ~]# cat /proc/partitions
> major minor #blocks name
>
> 8 0 62914560 sda
> 8 1 512000 sda1
> 8 2 62401536 sda2
> 11 0 3799040 sr0
> 253 0 4063232 dm-0
> 253 1 39153664 dm-1
> 253 2 19116032 dm-2
> 43 0 20971520 nbd0
>
>
> address@hidden ~]# fdisk /dev/nbd0 -l
>
> Disk /dev/nbd0: 21.5 GB, 21474836480 bytes, 41943040 sectors
> Units = sectors of 1 * 512 = 512 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disk label type: dos
> Disk identifier: 0x00010c17
>
> Device Boot Start End Blocks Id System
> /dev/nbd0p1 * 63 208844 104391 83 Linux
> /dev/nbd0p2 208845 41929649 20860402+ 8e Linux LVM
>
>
> address@hidden qemu-3.0.0]# ./qemu-nbd -vc /dev/nbd0 --format=raw
> /home/pnsc/nsc.3.5.1b.debug/nsc.3.5.1b.debug.raw
> NBD device /dev/nbd0 is now connected to
> /home/pnsc/nsc.3.5.1b.debug/nsc.3.5.1b.debug.raw
>
> still i get the same issue as below... when i try to mount /dev/nbd0p1
>
> address@hidden ~]# mount /dev/nbd0p1
> /home/pnsc/nsc.3.5.1b.debug/mnt/boot/
> mount: special device /dev/nbd0p1 does not exist
>
>
> On Wed, Dec 5, 2018 at 6:22 AM ramakanth varala <
> address@hidden> wrote:
>
>> I don't see any --format..option
>>
>>
>>
>> address@hidden ~]# qemu-nbd --help
>> Usage: qemu-nbd [OPTIONS] FILE
>> QEMU Disk Network Block Device Server
>>
>> -p, --port=PORT port to listen on (default `10809')
>> -o, --offset=OFFSET offset into the image
>> -b, --bind=IFACE interface to bind to (default `0.0.0.0')
>> -k, --socket=PATH path to the unix socket
>> (default '/var/lock/qemu-nbd-DEVICE')
>> -r, --read-only export read-only
>> -P, --partition=NUM only expose partition NUM
>> -s, --snapshot use snapshot file
>> -n, --nocache disable host cache
>> -c, --connect=DEV connect FILE to the local NBD device DEV
>> -d, --disconnect disconnect the specified device
>> -e, --shared=NUM device can be shared by NUM clients (default '1')
>> -t, --persistent don't exit on the last connection
>> -v, --verbose display extra debugging information
>> -h, --help display this help and exit
>> -V, --version output version information and exit
>>
>> Report bugs to <address@hidden>
>> address@hidden ~]# qemu-nbd --version
>> qemu-nbd version 0.0.1
>> Written by Anthony Liguori.
>>
>> Copyright (C) 2006 Anthony Liguori <address@hidden>.
>> This is free software; see the source for copying conditions. There is NO
>> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
>> PURPOSE.
>>
>>
>>
>> should i install any other version to get that..?
>>
>>
>>
>> On Tue, Dec 4, 2018 at 7:14 PM Pascal <address@hidden> wrote:
>>
>>> 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 <
>>> address@hidden> a écrit :
>>>
>>>> address@hidden ~]# 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 <address@hidden> 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 <
>>>>> address@hidden> a écrit :
>>>>>
>>>>>> Hi Pascal..
>>>>>>
>>>>>> this works fine ....
>>>>>>
>>>>>> address@hidden ~]# 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..
>>>>>>
>>>>>>
>>>>>> address@hidden ~]# 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..
>>>>>>
>>>>>>
>>>>>> address@hidden ~]# 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 <address@hidden> 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 <
>>>>>>> address@hidden> a écrit :
>>>>>>>
>>>>>>>> Hi Pascal..
>>>>>>>>
>>>>>>>> I tried like below..
>>>>>>>>
>>>>>>>> address@hidden ~]# qemu-nbd -d /dev/nbd0
>>>>>>>> /dev/nbd0 disconnected
>>>>>>>>
>>>>>>>> address@hidden ~]# 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 <
>>>>>>>> address@hidden> wrote:
>>>>>>>>
>>>>>>>>> first time i got below..
>>>>>>>>>
>>>>>>>>> address@hidden ~]# kpartx -a /dev/ndb0
>>>>>>>>> failed to stat() /dev/ndb0
>>>>>>>>>
>>>>>>>>> from second time onwards like below..
>>>>>>>>>
>>>>>>>>> address@hidden ~]# kpartx -a /dev/nbd0
>>>>>>>>> device-mapper: resume ioctl failed: Invalid argument
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Tue, Dec 4, 2018 at 4:23 PM Jan Schermer <address@hidden>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> Partigion is missing :-)
>>>>>>>>>> try:
>>>>>>>>>> kpartx -a /dev/ndb0
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> > On 4 Dec 2018, at 11:35, ramakanth varala <
>>>>>>>>>> address@hidden> wrote:
>>>>>>>>>> >
>>>>>>>>>> > Hi Pascal..
>>>>>>>>>> >
>>>>>>>>>> > yes its RW ...
>>>>>>>>>> >
>>>>>>>>>> > address@hidden ~]# 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
>>>>>>>>>> >
>>>>>>>>>> > address@hidden ~]# ls -ltr /dev/nbd0*
>>>>>>>>>> > brw-r----- 1 root disk 43, 0 Dec 4 11:06 /dev/nbd0
>>>>>>>>>> >
>>>>>>>>>> > address@hidden ~]# mount /dev/nbd0p1
>>>>>>>>>> /home/test/test.3.5.1b.debug/mnt/boot/
>>>>>>>>>> > mount: special device /dev/nbd0p1 does not exist
>>>>>>>>>> >
>>>>>>>>>> > address@hidden ~]# 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 <address@hidden>
>>>>>>>>>> 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 <
>>>>>>>>>> address@hidden>
>>>>>>>>>> >> a écrit :
>>>>>>>>>> >>
>>>>>>>>>> >>> Hi ,
>>>>>>>>>> >>>
>>>>>>>>>> >>> I tried below steps .. still with some errors..
>>>>>>>>>> >>>
>>>>>>>>>> >>>
>>>>>>>>>> >>> address@hidden ~]# 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
>>>>>>>>>> >>>
>>>>>>>>>> >>> address@hidden ~]# blockdev --rereadpt /dev/nbd0
>>>>>>>>>> >>> BLKRRPART: Invalid argument
>>>>>>>>>> >>> address@hidden ~]# ls /dev/nbd0
>>>>>>>>>> >>> /dev/nbd0
>>>>>>>>>> >>> address@hidden ~]# ls /dev/nbd0*
>>>>>>>>>> >>> /dev/nbd0
>>>>>>>>>> >>>
>>>>>>>>>> >>>
>>>>>>>>>> >>>
>>>>>>>>>> >>> Thanks
>>>>>>>>>> >>> Rama Kanth
>>>>>>>>>> >>>
>>>>>>>>>> >>> On Fri, Nov 30, 2018 at 6:48 PM Pascal <address@hidden>
>>>>>>>>>> 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 <
>>>>>>>>>> >>>> address@hidden>
>>>>>>>>>> >>>> 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
>>>>>>>>>> >>>>>
>>>>>>>>>> >>>>> address@hidden ~]# 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
>>>>>>>>>> >>>>>
>>>>>>>>>> >>>>> address@hidden ~]# 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
>>>>>>>>>> >>>>>
>>>>>>>>>> >>>>>
>>>>>>>>>> >>>>> address@hidden ~]# 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.
>>>>>>>>>> >>>>>
>>>>>>>>>> >>>>> address@hidden ~]# 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 <address@hidden>
>>>>>>>>>> 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 <
>>>>>>>>>> address@hidden> 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..
>>>>>>>>>> >>>>>>>>
>>>>>>>>>> >>>>>>>> address@hidden ~]# kpartx -a /dev/nbd0
>>>>>>>>>> >>>>>>>> read error, sector 0
>>>>>>>>>> >>>>>>>> read error, sector 1
>>>>>>>>>> >>>>>>>> read error, sector 29
>>>>>>>>>> >>>>>>>> address@hidden ~]# 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 <
>>>>>>>>>> >>>>>>>> address@hidden> 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 ..
>>>>>>>>>> >>>>>>>>>>
>>>>>>>>>> >>>>>>>>>>
>>>>>>>>>> >>>>>>>>>> address@hidden ~]# partx -a /dev/nbd0
>>>>>>>>>> >>>>>>>>>> HDIO_GETGEO: Inappropriate ioctl for device
>>>>>>>>>> >>>>>>>>>>
>>>>>>>>>> >>>>>>>>>> On Thu, Nov 29, 2018 at 4:04 PM Nerijus Baliūnas <
>>>>>>>>>> >>>>>>>>>> address@hidden> wrote:
>>>>>>>>>> >>>>>>>>>>
>>>>>>>>>> >>>>>>>>>>> 2018-11-29 12:10, ramakanth varala rašė:
>>>>>>>>>> >>>>>>>>>>>> address@hidden ~]# 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
>>>>>>>>>> >>>>>>>
>>>>>>>>>> >>>>>>>
>>>>>>>>>> >>>>>>>
>>>>>>>>>> >>>>>>
>>>>>>>>>> >>>>>
>>>>>>>>>> >>>>
>>>>>>>>>> >>>
>>>>>>>>>> >>
>>>>>>>>>>
>>>>>>>>>>