Hello Neil ,
On Tue, 9 Oct 2007, Neil Brown wrote:
On Tuesday October 9, janek_listy@xxxxx wrote:
Problems at step 4.: 'man mdadm' doesn't tell if it's possible to
grow an array to a degraded array (non existant disc). Is it possible?
Why not experiment with loop devices on files and find out?
But yes: you can grow to a degraded array providing you specify a
--backup-file.
Is there an estimate of how large this file can get ?
It's probably a calculation based on disk & array parameters .
But I was unable to find a reference on it from the manpage .
Tia , JimL
However I don't recommend it. I would never recommend having a
degraded array by design. It should only ever happen due to a
failure, and should last only until you can get a replacement
rebuilt.
Remember that a degraded raid5 has a greater risk of data loss than a
single drive.
PS: the fact, that degraded array will be unsafe for the data is an
intented motivating factor for buying next drive ;)
:-)
NeilBrown
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