Help assessing the output of fsck on my external drive

EDIT: It's Terabytes, not Gigabytes
Hi all,
I have a 3GB 3 TB external hard drive in ext4. It's new but lately it has often been giving me
input/output errors. That said, there was a heavy usage at the time, with two external
disks being written with data. Also, I had once unplugged the drive by mistake while data
was being written on it.
Could somebody tell me what conclusions can we have from the following result of fsck?
I'm curious if the disk is damaged or something.
Thanks in advance.
jorge@flamingo:~$ sudo fsck.ext4 -cDfty -C 0 /dev/sdb1
e2fsck 1.42.12 (29-Aug-2014)
BRICK: recovering journal
Checking for bad blocks (read-only test): 0.43% done, 7:22 0.43% done, 7:24 elapsed. (0/0/0 errors) <---- That went on for about a day
BRICK: Updating bad block inode.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
/lost+found not found. Create? yes
Pass 3A: Optimizing directories
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Free blocks count wrong (667461777, counted=667500230).
Fix? yes
Free inodes count wrong (183133100, counted=183133113).
Fix? yes
BRICK: ***** FILE SYSTEM WAS MODIFIED *****
BRICK: 15431/183148544 files (15.4% non-contiguous), 65066042/732566272 blocks
Memory used: 608k/704k (470k/139k), time: 90243.44/14.23/ 0.19
I/O read: 35MB, write: 21MB, rate: 0.00MB/s
Last edited by geo909 (2014-10-01 20:32:43)

graysky wrote:OK... the command I posted will do a scan of the entire disk... for 3TB, that will likely take days. Do you see any reallocated sectors from `smartctl --all /dev/sdX | grep -i reall` ? If you do, scanning the disk might be a waste of your time. Once you get them, more tend to follow. Probably better to RMA the drive.
smartctl says the health status is OK. So I'll start running e2fsck.
On another note, after googling around, I started suspecting the power too. I live in an old house, with very few outlets,
so I have one outlet for: a monitor; speakers; a laptop; a printer/scanner; a powered usb hub connected to an external
disk and an mp3 player; a desk lamp, and this hard disk.
Also, the last time the disk gave me a I/O error was when I was doing a very large synchronization with unison in two disks
simultaneously. With normal use I haven't had anything unusual so far, so maybe it's just that I've been asking too much
from my drives.
Last edited by geo909 (2014-10-02 02:35:10)

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