[Moto G Q&A, Help & Troubleshooting] jignesh_shah:
Further on investigating, I ran command

e2fsck -y /dev/block/mmcblk0p34 where /system is mounted. following is a log:

/dev/block/mmcblk0p34 contains a file system with errors, check forced.

Pass 1: Checking inodes, blocks, and sizes

Pass 2: Checking directory structure

Error reading block 54295 (Attempt to read block from filesystem resulted in short read) while reading directory block. Ignore error? yes

Force rewrite? yes

Directory inode 395, block #0, offset 0: directory corrupted

Salvage? yes

Missing '.' in directory inode 395.

Fix? yes

Setting filetype for entry '.' in ??? (395) to 2.

Missing '..' in directory inode 395.

Fix? yes

Setting filetype for entry '..' in ??? (395) to 2.

Pass 3: Checking directory connectivity

'..' in /etc (395) is <The NULL inode> (0), should be / (2).

Fix? yes

Unconnected directory inode 408 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 413 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 418 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 436 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 466 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 491 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 508 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 553 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 560 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 720 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 729 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 7871 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 7875 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 7879 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 7885 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 7888 (/etc/???)

Connect to /lost+found? yes

Unconnected directory inode 15799 (/etc/???)

Connect to /lost+found? yes

Pass 4: Checking reference counts

Unattached inode 202

Connect to /lost+found? yes

Inode 202 ref count is 2, should be 1. Fix? yes

Unattached inode 203

Connect to /lost+found? yes

Inode 203 ref count is 2, should be 1. Fix? yes

Unattached inode 205

Connect to /lost+found? yes

Inode 205 ref count is 2, should be 1. Fix? yes

Unattached inode 206

Connect to /lost+found? yes

Inode 206 ref count is 2, should be 1. Fix? yes

Unattached inode 220

Connect to /lost+found? yes

Inode 220 ref count is 2, should be 1. Fix? yes

Unattached inode 222

Connect to /lost+found? yes

Inode 222 ref count is 2, should be 1. Fix? yes

Unattached inode 227

Connect to /lost+found? yes

Inode 227 ref count is 2, should be 1. Fix? yes

Unattached inode 240

Connect to /lost+found? yes

Inode 240 ref count is 2, should be 1. Fix? yes

Unattached inode 243

Connect to /lost+found? yes

Inode 243 ref count is 2, should be 1. Fix? yes

Unattached inode 244

Connect to /lost+found? yes

Inode 244 ref count is 2, should be 1. Fix? yes

Unattached inode 247

Connect to /lost+found? yes

Inode 247 ref count is 2, should be 1. Fix? yes

Unattached inode 249

Connect to /lost+found? yes

Inode 249 ref count is 2, should be 1. Fix? yes

Unattached inode 250

Connect to /lost+found? yes

Inode 250 ref count is 2, should be 1. Fix? yes

Unattached inode 265

Connect to /lost+found? yes

Inode 265 ref count is 2, should be 1. Fix? yes

Unattached inode 273

Connect to /lost+found? yes

Inode 273 ref count is 2, should be 1. Fix? yes

Unattached inode 368

Connect to /lost+found? yes

Inode 368 ref count is 2, should be 1. Fix? yes

Unattached inode 369

Connect to /lost+found? yes

Inode 369 ref count is 2, should be 1. Fix? yes

Unattached inode 371

Connect to /lost+found? yes

Inode 371 ref count is 2, should be 1. Fix? yes

Unattached inode 372

Connect to /lost+found? yes

Inode 372 ref count is 2, should be 1. Fix? yes

Unattached inode 373

Connect to /lost+found? yes

Inode 373 ref count is 2, should be 1. Fix? yes

Unattached inode 374

Connect to /lost+found? yes

Inode 374 ref count is 2, should be 1. Fix? yes

Unattached inode 376

Connect to /lost+found? yes

Inode 376 ref count is 2, should be 1. Fix? yes

Unattached inode 383

Connect to /lost+found? yes

Inode 383 ref count is 2, should be 1. Fix? yes

Unattached inode 407

Connect to /lost+found? yes

Inode 407 ref count is 2, should be 1. Fix? yes

Inode 408 ref count is 3, should be 2. Fix? yes

Unattached inode 410

Connect to /lost+found? yes

Inode 410 ref count is 2, should be 1. Fix? yes

Unattached inode 411

Connect to /lost+found? yes

Inode 411 ref count is 2, should be 1. Fix? yes

Inode 413 ref count is 3, should be 2. Fix? yes

Unattached inode 416

Connect to /lost+found? yes

Inode 416 ref count is 2, should be 1. Fix? yes

Unattached inode 417

Connect to /lost+found? yes

Inode 417 ref count is 2, should be 1. Fix? yes

Inode 418 ref count is 4, should be 3. Fix? yes

Unattached inode 420

Connect to /lost+found? yes

Inode 420 ref count is 2, should be 1. Fix? yes

Unattached inode 424

Connect to /lost+found? yes

Inode 424 ref count is 2, should be 1. Fix? yes

Unattached inode 428

Connect to /lost+found? yes

Inode 428 ref count is 2, should be 1. Fix? yes

Unattached inode 431

Connect to /lost+found? yes

Inode 431 ref count is 2, should be 1. Fix? yes

Unattached inode 432

Connect to /lost+found? yes

Inode 432 ref count is 2, should be 1. Fix? yes

Unattached inode 433

Connect to /lost+found? yes

Inode 433 ref count is 2, should be 1. Fix? yes

Unattached inode 434

Connect to /lost+found? yes

Inode 434 ref count is 2, should be 1. Fix? yes

Inode 436 ref count is 5, should be 4. Fix? yes

Unattached inode 450

Connect to /lost+found? yes

Inode 450 ref count is 2, should be 1. Fix? yes

Unattached inode 452

Connect to /lost+found? yes

Inode 452 ref count is 2, should be 1. Fix? yes

Unattached inode 455

Connect to /lost+found? yes

Inode 455 ref count is 2, should be 1. Fix? yes

Unattached inode 459

Connect to /lost+found? yes

Inode 459 ref count is 2, should be 1. Fix? yes

Unattached inode 460

Connect to /lost+found? yes

Inode 460 ref count is 2, should be 1. Fix? yes

Unattached inode 465

Connect to /lost+found? yes

Inode 465 ref count is 2, should be 1. Fix? yes

Inode 466 ref count is 3, should be 2. Fix? yes

Unattached inode 470

Connect to /lost+found? yes

Inode 470 ref count is 2, should be 1. Fix? yes

Unattached inode 471

Connect to /lost+found? yes

Inode 471 ref count is 2, should be 1. Fix? yes

Unattached inode 472

Connect to /lost+found? yes

Inode 472 ref count is 2, should be 1. Fix? yes

Unattached inode 473

Connect to /lost+found? yes

Inode 473 ref count is 2, should be 1. Fix? yes

Unattached inode 476

Connect to /lost+found? yes

Inode 476 ref count is 2, should be 1. Fix? yes

Unattached inode 477

Connect to /lost+found? yes

Inode 477 ref count is 2, should be 1. Fix? yes

Unattached inode 478

Connect to /lost+found? yes

Inode 478 ref count is 2, should be 1. Fix? yes

Unattached inode 480

Connect to /lost+found? yes

Inode 480 ref count is 2, should be 1. Fix? yes

Unattached inode 481

Connect to /lost+found? yes

Inode 481 ref count is 2, should be 1. Fix? yes

Inode 491 ref count is 7, should be 6. Fix? yes

Inode 508 ref count is 3, should be 2. Fix? yes

Inode 553 ref count is 3, should be 2. Fix? yes

Unattached inode 558

Connect to /lost+found? yes

Inode 558 ref count is 2, should be 1. Fix? yes

Inode 560 ref count is 4, should be 3. Fix? yes

Inode 720 ref count is 3, should be 2. Fix? yes

Inode 729 ref count is 3, should be 2. Fix? yes

Unattached inode 733

Connect to /lost+found? yes

Inode 733 ref count is 2, should be 1. Fix? yes

Unattached inode 1126

Connect to /lost+found? yes

Inode 1126 ref count is 2, should be 1. Fix? yes

Unattached inode 1129

Connect to /lost+found? yes

Inode 1129 ref count is 2, should be 1. Fix? yes

Unattached inode 1485

Connect to /lost+found? yes

Inode 1485 ref count is 2, should be 1. Fix? yes

Unattached inode 1493

Connect to /lost+found? yes

Inode 1493 ref count is 2, should be 1. Fix? yes

Unattached inode 1495

Connect to /lost+found? yes

Inode 1495 ref count is 2, should be 1. Fix? yes

Unattached inode 1505

Connect to /lost+found? yes

Inode 1505 ref count is 2, should be 1. Fix? yes

Unattached inode 1773

Connect to /lost+found? yes

Inode 1773 ref count is 2, should be 1. Fix? yes

Unattached inode 1775

Connect to /lost+found? yes

Inode 1775 ref count is 2, should be 1. Fix? yes

Unattached inode 1784

Connect to /lost+found? yes

Inode 1784 ref count is 2, should be 1. Fix? yes

Unattached inode 1785

Connect to /lost+found? yes

Inode 1785 ref count is 2, should be 1. Fix? yes

Inode 7871 ref count is 3, should be 2. Fix? yes

Inode 7875 ref count is 3, should be 2. Fix? yes

Inode 7879 ref count is 3, should be 2. Fix? yes

Inode 7885 ref count is 3, should be 2. Fix? yes

Inode 7888 ref count is 3, should be 2. Fix? yes

Inode 15799 ref count is 3, should be 2. Fix? yes

Pass 5: Checking group summary information

/dev/block/mmcblk0p34: ***** FILE SYSTEM WAS MODIFIED *****

/dev/block/mmcblk0p34: 2204/62464 files (8.3% non-contiguous), 244167/249856 blocks