linux-ext4 - Re: badblocks from e2fsprogs

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Message-ID: <YD0DaqIbAf0T2tw2@mit.edu>
Date:   Mon, 1 Mar 2021 10:08:26 -0500
From:   "Theodore Ts'o" <tytso@....edu>
To:     Sedat Dilek <sedat.dilek@...il.com>
Cc:     linux-ext4@...r.kernel.org
Subject: Re: badblocks from e2fsprogs

On Mon, Mar 01, 2021 at 10:20:36AM +0100, Sedat Dilek wrote:
> 
> root@...za:~/DISK-HEALTH# LC_ALL=C badblocks -v -p 1 -s /dev/sdc -o
> badblocks-v-p-1-s_dev-sdc_$(uname -r).txt
> Checking blocks 0 to 976762583
> Checking for bad blocks (read-only test): done
> Pass completed, 0 bad blocks found. (0/0/0 errors)
> 
> root@...za:~/DISK-HEALTH# ll
> badblocks-v-p-1-s_dev-sdc_5.11.0-11646.1-amd64-clang13-cfi.txt
> -rw-r--r-- 1 root root 0 28. Feb 19:33
> badblocks-v-p-1-s_dev-sdc_5.11.0-11646.1-amd64-clang13-cfi.txt
> 
> Unfortunately, the output-file is empty.
> Do I miss something (order of options for example)?

Nope; the output file is a list of block numbers for which badblocks
found problems.

> The whole single-pass badblocks run took approx. 3 hours - last I
> looked 50% was 01:26 [hh:mm].
> On stdout (and in output-file) - no summary of the total-time.
> 
> Is that possible to have:
> 
> Pass completed, 0 bad blocks found. (0/0/0 errors) + <total-time_of_run>

The output file was designed for use to be fed into mke2fs (via the -l
option) or e2fsck (via the -l or -L options).  So we can't change the
format of the output file without breaking those programs.

You will note that the output is in the badblocks standard output:

Pass completed, 0 bad blocks found. (0/0/0 errors)

So there should be no confusion in the mind of the person running the
badblocks program.

Regards,

					- Ted