How to run bad block scan on External USB drive

[datorexpert]

Is no one able to tell the right command with parameters how to run a badblock scan on an external USB-disk connected to a QNAP NAS?

[MrVideo]

Install entware-ng (http://forum.qnap.com/viewtopic.php?f=351&t=116737) then install: smartmontools

The list of supported devices is here: https://www.smartmontools.org/wiki/Supp ... SB-Devices

Then run:

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smartctl -h

for the list of commandline options. Hopefully what you want to do, you can do.

[murrayvr]

I also found it frustrating that you couldn't run the bad block scan of USB drives from within the qnap toolset provided. I found this site which has software that runs a bunch of tests:
http://hddscan.com/

Portable windows app so no need to install.
Hope it helps.

[OneCD]

I also found it frustrating that you couldn't run the bad block scan of USB drives from within the qnap toolset provided.

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[/share] # df | grep external
/dev/sdg1               959.0M      5.3M    953.7M   1% /share/external/DEV3401_1
[/share] # badblocks -v /dev/sdg1
Checking blocks 0 to 982015
Checking for bad blocks (read-only test): done                                
Pass completed, 0 bad blocks found.

[MCCDOM]

QNAP technical support say "In the current design, QNAP NAS does not support running the bad block scan on an external drive. We would recommend to check the external drive with the manufacturer's tools.".
This is annoying but clears up the question. I personally use HD Tune on a PC to check for bad sectors. Tip I found when using HD Tune is to not run the quick scan as that can miss some errors.

[shooms99]

I also found it frustrating that you couldn't run the bad block scan of USB drives from within the qnap toolset provided.

Please vote to add this feature so that QNAP knows how vital this is for those of us who use External USB Drives. It will take all of 15 seconds since you don't need to log in. Just provide your email address and select 1, 2, or 3 votes.

https://qnap.uservoice.com/forums/21337 ... isk-health

[Dipster]

The badblock program only supports 32 bit range. :-/

The error I get running it on 4.3.3 and a 5TB drive...

badblocks: Value too large for defined data type invalid end block (4883638272): must be 32-bit value

[shooms99]

The badblock program only supports 32 bit range. :-/

The error I get running it on 4.3.3 and a 5TB drive...

badblocks: Value too large for defined data type invalid end block (4883638272): must be 32-bit value

For any interested parties: I scoured the internet, and I *think* I managed to get badblocks to work on larger drives:

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badblocks -b 16384 -sv /dev/sdc

Please keep in mind that badblocks is considered deprecated. Coming from a linux newbie (me) ... Standard Disclaimer: USE AT YOUR OWN RISK!
Also, the "/dev/sdc" is the drive you are trying to scan. It could be sdb or sdd, etc.

PS. Dipster, thanks for adding your votes to the Uservoice.com tally

[steven424]

The command to check for bad blocks is

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e2fsck -c /dev/sdXX

The disk needs to be unmounted to prevent conflicts

To get "/dev/sdXX", use the df command and look for a line like this

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/dev/sde1                 3.6T     88.2M      3.6T   0% /share/external/DEV3301_1

You can also use the command "e2fsck -?" to get a list of all the commandline parameters and arguments

As far as I can tell, e2fsck can only be run from the commandline. THere is no way to run it on an external device from the QTS UI

I agree that the attitude of the original responder was atrocious and completely uncalled for. Karma can be a **, though...

[kacharava]

Exactly my situation

With the only difference I was cleaning HDDs from my external eSATA RAID enclosure that I use for backing up my QNAP TS-659 with DBaN and it discovered that one HDD has bad blocks. I've replaced that disk, created new RAID volume and decided to check the volume first before using it. And after not seeing the command for checking external volume for errors in TS-659's web admin interface I've found this beautiful tread

QNap says there`s bad block and to run a scan. There is no indication whatsoever on how to do this, so you google it, find this thread and go "wow, these guys are massive jerks".

[polo]

The command to check for bad blocks is

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e2fsck -c /dev/sdXX

The disk needs to be unmounted to prevent conflicts

To get "/dev/sdXX", use the df command and look for a line like this

Code: Select all

/dev/sde1                 3.6T     88.2M      3.6T   0% /share/external/DEV3301_1

You can also use the command "e2fsck -?" to get a list of all the commandline parameters and arguments

As far as I can tell, e2fsck can only be run from the commandline. THere is no way to run it on an external device from the QTS UI

I agree that the attitude of the original responder was atrocious and completely uncalled for. Karma can be a **, though...

Thanks for your info which i am able to scan my external disk now