Hi Jaikumar,

AFAICS the problem you're facing is that the d-i kernel modules and
the kernel you're running don't match up. Here's the kernel version
you have:

On Sat, Jun 23, 2018 at 09:47:39PM +0530, Jaikumar Sharma wrote:
>
>Jun 23 14:20:40 syslogd started: BusyBox v1.22.1
>Jun 23 14:20:40 kernel: klogd started: BusyBox v1.22.1 (Debian
>1:1.22.0-9+deb8u1)
>Jun 23 14:20:40 kernel: [    0.000000] Initializing cgroup subsys cpuset
>Jun 23 14:20:40 kernel: [    0.000000] Initializing cgroup subsys cpu
>Jun 23 14:20:40 kernel: [    0.000000] Initializing cgroup subsys cpuacct
>Jun 23 14:20:40 kernel: [    0.000000] Linux version 3.16.0-4-586 (
>debian-ker...@lists.debian.org) (gcc version 4.8.4 (Debian 4.8.4-1) ) #1 Debian
>3.16.7-ckt9-2 (2015-04-13)
...

and here are lots of "Unknown symbol" errors when d-i is trying to
load various filesystem modules:

>Jun 23 14:22:42 preseed: running preseed command partman/early_command: wget -P
>/tmp ftp://192.168.1.34/localrepo/install.scripts/scripts/config.sh
>Jun 23 14:22:42 log-output: Connecting to 192.168.1.34 (192.168.1.34:21)
>Jun 23 14:22:42 log-output: ^Mconfig_backup.sh     100% |
>*******************************|  2515   0:00:00 ETA
>Jun 23 14:22:42 kernel: [  139.713269] ext4: Unknown symbol setattr_prepare
>(err 0)
>Jun 23 14:22:42 kernel: [  139.713731] ext4: Unknown symbol __bread_gfp (err 0)
>Jun 23 14:22:42 kernel: [  139.713779] ext4: Unknown symbol __getblk_gfp (err
>0)
>Jun 23 14:22:42 kernel: [  139.713809] ext4: Unknown symbol
>posix_acl_update_mode (err 0)
>Jun 23 14:22:42 kernel: [  139.814438] raid6: mmxx1     5762 MB/s
>Jun 23 14:22:42 md-devices: mdadm: No devices listed in partitions
>Jun 23 14:22:42 md-devices: mdadm: No devices listed in conf file were found.
>Jun 23 14:22:42 kernel: [  139.882447] raid6: mmxx2     6136 MB/s
>Jun 23 14:22:42 kernel: [  139.950455] raid6: sse1x1    4760 MB/s
>Jun 23 14:22:42 kernel: [  140.018463] raid6: sse1x2    5924 MB/s
>Jun 23 14:22:42 kernel: [  140.086474] raid6: sse2x1    9564 MB/s
>Jun 23 14:22:42 kernel: [  140.154484] raid6: sse2x2   12018 MB/s
>Jun 23 14:22:42 kernel: [  140.154485] raid6: using algorithm sse2x2 (12018 MB/
>s)
>Jun 23 14:22:42 kernel: [  140.154486] raid6: using ssse3x1 recovery algorithm
>Jun 23 14:22:42 kernel: [  140.220352] xor: automatically using best
>checksumming function:
>Jun 23 14:22:42 kernel: [  140.258486]    avx       : 20146.000 MB/sec
>Jun 23 14:22:42 kernel: [  140.259696] btrfs: Unknown symbol setattr_prepare
>(err 0)
>Jun 23 14:22:42 kernel: [  140.260185] btrfs: Unknown symbol
>posix_acl_update_mode (err 0)
>Jun 23 14:22:42 kernel: [  140.264461] ext4: Unknown symbol setattr_prepare
>(err 0)
>Jun 23 14:22:42 kernel: [  140.264915] ext4: Unknown symbol __bread_gfp (err 0)
>Jun 23 14:22:42 kernel: [  140.264965] ext4: Unknown symbol __getblk_gfp (err
>0)
>Jun 23 14:22:42 kernel: [  140.265008] ext4: Unknown symbol
>posix_acl_update_mode (err 0)
>Jun 23 14:22:42 kernel: [  140.265748] ext4: Unknown symbol setattr_prepare
>(err 0)
>Jun 23 14:22:42 kernel: [  140.266191] ext4: Unknown symbol __bread_gfp (err 0)
>Jun 23 14:22:42 kernel: [  140.266239] ext4: Unknown symbol __getblk_gfp (err
>0)
>Jun 23 14:22:42 kernel: [  140.266270] ext4: Unknown symbol
>posix_acl_update_mode (err 0)
>Jun 23 14:22:42 kernel: [  140.270835] jfs: Unknown symbol setattr_prepare (err
>0)
>Jun 23 14:22:42 kernel: [  140.270975] jfs: Unknown symbol __bread_gfp (err 0)
>Jun 23 14:22:42 kernel: [  140.271009] jfs: Unknown symbol __getblk_gfp (err 0)
>Jun 23 14:22:42 kernel: [  140.271022] jfs: Unknown symbol
>posix_acl_update_mode (err 0)
>Jun 23 14:22:42 kernel: [  140.276230] xfs: Unknown symbol setattr_prepare (err
>0)
>Jun 23 14:22:42 kernel: [  140.276555] xfs: Unknown symbol
>posix_acl_update_mode (err 0)
>Jun 23 14:22:42 kernel: [  140.451316] device-mapper: uevent: version 1.0.3
>Jun 23 14:22:42 kernel: [  140.451490] device-mapper: ioctl: 4.27.0-ioctl
>(2013-10-30) initialised: dm-de...@redhat.com
>Jun 23 14:22:42 partman:   No matching physical volumes found
>Jun 23 14:22:42 partman:   Reading all physical volumes.  This may take a
>while...
>Jun 23 14:22:42 partman:   
>Jun 23 14:22:42 partman: No volume groups found
>Jun 23 14:22:42 partman: 
>Jun 23 14:22:42 partman-lvm:   
>Jun 23 14:22:42 partman-lvm: No volume groups found
>Jun 23 14:22:42 partman-lvm: 
>Jun 23 14:22:42 kernel: [  140.486141] efivars: Unknown symbol ucs2_as_utf8
>(err 0)
>Jun 23 14:22:42 kernel: [  140.486163] efivars: Unknown symbol ucs2_utf8size
>(err 0)
>Jun 23 14:22:42 kernel: [  140.486164] efivars: disagrees about version of
>symbol efivar_validate
>Jun 23 14:22:42 kernel: [  140.486165] efivars: Unknown symbol efivar_validate
>(err -22)
>Jun 23 14:22:50 init: starting pid 146, tty '/dev/tty2': '-/bin/sh'

The most common cause of this kind of problem for people netbooting is
them updating *some* of the installer (i.e. the modules in the Debian
archive) without also updating the kernel that's being served by
tftp. Please go and check that...

-- 
Steve McIntyre, Cambridge, UK.                                st...@einval.com
< liw> everything I know about UK hotels I learned from "Fawlty Towers"

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