Re: smartctl on SSD question

From	David Christensen <dpchrist@holgerdanske.com>
Newsgroups	linux.debian.user
Subject	Re: smartctl on SSD question
Date	2021-03-20 20:20 +0100
Message-ID	<BUPiF-3Kb-3@gated-at.bofh.it> (permalink)
References	<BUHuO-7dC-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 3/20/21 3:50 AM, Gene Heskett wrote:
> Greetings all;
> 
> I have been using amanda on this machine to back up the rest of my
> machines for over 2 decades. So I'm not a new user.
> 
> But I installed a 240 gig SSD about 6 months back, because its use as a
> holding disk tripled amanda's speed at backing up this 6 machine system.
> 
> But amanda has been increasingly plagued with bad crc checksums of the
> data in this holding disk, which usually leaves the files on that disk
> as it redoes that disklist entry bypassing the holding disk, which
> obviously takes longer as it is then doing the backup directly to the
> archive medium.
> 
> I just initiated a "-t long" test on it.  So since its an SSD, what is
> the best command to extract the most complete test report possible when
> the test has finished? Its now done, and the -a option gives it a clean
> report, along with a list of this and thats not supported. Cheap adata
> drive.

I typically use the smartctl(8) '-x' option to get the most information:

     # smartctl -x /dev/sda

I pipe the output to a file, and put the file into a version control 
system.  This allows me to look for trends.

It is good that Amanda does checksums on the backup repository, but bad 
that Amanda is detecting errors.  Get your backups onto reliable storage 
immediately.  I do ZFS and mirrored HDD's with an SSD cache.  The SSD 
cache can improve replication performance by an order of magnitude.  If 
you're not using ZFS, there are SSD cache solutions for traditional 
filesystems and for LVM (I won't comment because I don't use them).

David

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smartctl on SSD question Gene Heskett <gheskett@shentel.net> - 2021-03-20 12:00 +0100
  Re: smartctl on SSD question "Alexander V. Makartsev" <avbetev@gmail.com> - 2021-03-20 13:30 +0100
    Re: smartctl on SSD question Gene Heskett <gheskett@shentel.net> - 2021-03-20 19:30 +0100
  Re: smartctl on SSD question David Christensen <dpchrist@holgerdanske.com> - 2021-03-20 20:20 +0100

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