[CentOS] odd messages at boot time

[fred roller]

On Mon, Feb 18, 2019, 11:24 AM Fred Smith <fredex at fcshome.stoneham.ma.us
wrote:

> I'm getting these messages during boot:
>
> error: failure reading sector 0xfc from 'hd4'
> error: failure reading sector 0xe0 from 'hd4'
> error: failure reading sector 0x0 from 'hd4'
> error: failure reading sector 0xfc from 'hd5'
> error: failure reading sector 0xe0 from 'hd5'
> error: failure reading sector 0x0 from 'hd5'
>
> they pop up soon after the Grub menu with a message to press ENTER to
> continue, and it times out in a few seconds if I don't press ENTER. These
> messages have been appearing for a long time, at least a couple of years
> and I've been too lethargic to investigate til now.
>
> I see no bad side-effects at runtime.
>
> I just did badblocks (read-only) on both sda and sdb (RAID-1 pair)
> which found no errors.
>
> I see nothing obviously related in dmesg, or /var/log/messages.
>
> I also have an external box (Venus DS3R Pro-2) with two drives, also
> RAID-1, that I use for backups. It is seen (after boot) as /dev/sdc.
>
> I'd have to pull the drives out of it and connect them to the SATA bus
> to run badblocks on them, as badblocks won't run on /dev/sdc.
>
> the nightly backups on to this box appear to run without issue.
>
> Anybody got any ideas on what this might be about?
>
> thanks in advance!
>
> Fred
> --
> ---- Fred Smith -- fredex at fcshome.stoneham.ma.us
> -----------------------------
>     "Not everyone who says to me, 'Lord, Lord,' will enter the kingdom of
>      heaven, but only he who does the will of my Father who is in heaven."
> ------------------------------ Matthew 7:21 (niv)
> -----------------------------
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Normally, as you have deduced, it seems to be just bad blocks. But given
that the addresses are identical on both drives I wonder if this is your
mirror? If so could it just be corrupted data?

-- Fred