I didn't realise that you wanted to look at the members of the array while
the array was active!! That is a bit harder. But not impossible.
Well, let's say that would be optimal, but even
off-line could be OK.
BTW, what does it mean "off-line"?
Does it mean that /dev/mdX exists, but it is not
used (un-mounted), or it is just read-only, or
it should *not* exists and only the componing
HDDs are available?
If you write a couple of numbers to 'suspend_lo' and 'suspend_hi' in sysfs,
then writes to blocks between those two array addresses will be blocked.
So you could suspend a region, look at the blocks, then un-suspend.
Oh, thanks, I will consider the option.
bye,
--
piergiorgio