Re: Recovery on new 2TB disk: finish=7248.4min (raid1)

[Roman Mamedov <rm@romanrm.net>]

On Mon, 1 May 2017 22:53:14 +0100
Anthony Youngman <antlists@youngman.org.uk> wrote:

> That's what I understood you to mean, but you are aware that SOME raid 
> management still has to be done with echo > /sys/... ?
> 
> So mdadm isn't perfect, not  by a long chalk, yet :-)

Well, why not post some examples of what you find yourself doing often
via /sys, that's not available in mdadm (maybe as a new thread).

One that I remember is the "want_replacement" mechanism, which was initially
only available via "echo > /sys/..." but quickly got added to mdadm as
"--replace".

People (and various outdated wikis) also tend to suggest using "echo check..."
or "echo repair...", but those are available in mdadm as well, via "--action=".

Lastly, I change the "stripe_cache_size" via /sys/, but that's fine-tuning,
which feels OK to do via sysfs parameters, whereas needing to use sysfs for the
most basic operations of managing the storage system does not.

-- 
With respect,
Roman