Netboot installers needs to have core drivers, which it is lacking at this moment. I've added additional drivers into 'initrd.gz' of netboot installer of debian 8.9 and problem is solved. Before adding these drivers was getting the below error into syslog and installation was broken :
Jun 25 04:31:12 log-output: Connecting to 192.168.1.34 (192.168.1.34:21) Jun 25 04:31:12 log-output: ^Mconfig_backup.sh 100% |*******************************| 2515 0:00:00 ETA Jun 25 04:31:12 log-output: Connecting to 192.168.1.34 (192.168.1.34:21) Jun 25 04:31:12 log-output: ^Mconfig.sh 100% |*******************************| 484 0:00:00 ETA Jun 25 04:31:13 kernel: [ 135.908098] raid6: mmxx1 5755 MB/s Jun 25 04:31:13 md-devices: mdadm: No devices listed in partitions Jun 25 04:31:13 md-devices: mdadm: No devices listed in conf file were found. Jun 25 04:31:13 kernel: [ 135.976109] raid6: mmxx2 6091 MB/s Jun 25 04:31:13 kernel: [ 136.044110] raid6: sse1x1 4732 MB/s Jun 25 04:31:13 kernel: [ 136.112126] raid6: sse1x2 5938 MB/s Jun 25 04:31:13 kernel: [ 136.180133] raid6: sse2x1 9508 MB/s Jun 25 04:31:13 kernel: [ 136.248160] raid6: sse2x2 12015 MB/s Jun 25 04:31:13 kernel: [ 136.248161] raid6: using algorithm sse2x2 (12015 MB/s) Jun 25 04:31:13 kernel: [ 136.248162] raid6: using ssse3x1 recovery algorithm Jun 25 04:31:13 kernel: [ 136.307283] xor: automatically using best checksumming function: Jun 25 04:31:13 kernel: [ 136.344149] avx : 20087.000 MB/sec Jun 25 04:31:13 kernel: [ 136.348442] Btrfs loaded Jun 25 04:31:13 kernel: [ 136.357943] JFS: nTxBlock = 8192, nTxLock = 65536 Jun 25 04:31:13 kernel: [ 136.366371] SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled Jun 25 04:31:13 partman: No matching physical volumes found Jun 25 04:31:13 kernel: [ 136.544037] device-mapper: uevent: version 1.0.3 Jun 25 04:31:13 kernel: [ 136.544235] device-mapper: ioctl: 4.27.0-ioctl (2013-10-30) initialised: dm-de...@redhat.com Jun 25 04:31:13 partman: Reading all physical volumes. This may take a while... Jun 25 04:31:13 partman: Jun 25 04:31:13 partman: No volume groups found Jun 25 04:31:13 partman: Jun 25 04:31:13 partman-lvm: Jun 25 04:31:13 partman-lvm: No volume groups found Thank you steve for helping in debugging the issue.
