Mailinglist Archive: opensuse-support (97 mails)

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Re: [opensuse-support] RAID1 disk pending sectors
On Thu, 8 Nov 2018 11:41:44 +0000
Dave Howorth <dave@xxxxxxxxxxxxxx> wrote:
Err, shouldn't that be

dd if=/dev/sdb of=lbasectorbackup bs=512 count=1 seek=142446713
dd if=lbasectorbackup of=/dev/sdc bs=512 count=1 seek=142446713

But I agree with the principle. There's no point in replacing a block
in one copy with zeros. It's then Russian roulette for ever more
whether that file is corrupt or not when you read it. (Unless the
filesystem has checksums or suchlike, of course). The RAID won't help.

I think it is that, verify.

Yes, being a raid you can also overwrite the entire disk.

Just to add a question. What is the point of this RAID? A RAID is not a
backup. A better use of the extra disk in a home system IMHO is as an
extra backup; ideally taken offline except when backing up. You need
RAID5 or RAID6 plus ZFS or XFS with checksums before RAID is worthwhile
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