From: Phillip Susi <psusi@ubuntu.com>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: Shrinking raid array
Date: Tue, 12 Feb 2013 14:13:53 -0500 [thread overview]
Message-ID: <511A9471.7070405@ubuntu.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1302121942490.32644@uplift.swm.pp.se>
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On 2/12/2013 1:43 PM, Mikael Abrahamsson wrote:
> On Tue, 12 Feb 2013, Phillip Susi wrote:
>
>> You move the superblock, then shrink the partition...
>
> As far as I know, mdadm has no code to shrink partitions?
Of course not, you would use fdisk or parted or whatever else to do that.
>> But it looks like mdadm doesn't move the superblock even though
>> it no longer is using the full partition.
>
> I think that is perfectly reasonable. Otherwise the superblock
> wouldn't be found next time if the partition wasn't resized.
Yes, but the way it is now the superblock won't be found if the
partition *is* resized. What is the use of reducing the amount of the
partition mdadm is using if you can't then shrink the partition itself?
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.17 (MingW32)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
iQEcBAEBAgAGBQJRGpRxAAoJEJrBOlT6nu750k8IAMwCbeO6rhWP+6pg0nPmgeyI
HM5E1X9bJTqV9MfmvSKYjL8QBp6flYqd0bm++lbeOxFiujxKQ5QVSHIF8no6psVe
wLLeGy3ltFJ41QnuQAIf2YwR0jhUAd2Wxoeqwq7pnGnSVb8er3Y2ACuj7SNN7SwL
pe8DbrUQGpDydnLSH/Rzj/ioQ8BtWt6Uq/xZ8+3j5t3pqAJGmdnQroRJJ6W+0oKN
IwK7IK0SVP8fExSjDM2Lo3YfFXfgpan81GADNwYo5ZwEtPTfxvcuXrGVLbjXyN4o
Ae6DAMpNihSDKzTXvpPqnzimqpMDtue01zQQdDgkYfcheoQ1DsHnfO8aCnS/mIg=
=i9j8
-----END PGP SIGNATURE-----
next prev parent reply other threads:[~2013-02-12 19:13 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-12 15:52 Shrinking raid array Phillip Susi
2013-02-12 16:39 ` Phillip Susi
2013-02-12 17:53 ` Mikael Abrahamsson
2013-02-12 18:11 ` Phillip Susi
2013-02-12 18:43 ` Mikael Abrahamsson
2013-02-12 19:13 ` Phillip Susi [this message]
2013-02-13 5:12 ` Mikael Abrahamsson
2013-02-13 5:17 ` Mikael Abrahamsson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=511A9471.7070405@ubuntu.com \
--to=psusi@ubuntu.com \
--cc=linux-raid@vger.kernel.org \
--cc=swmike@swm.pp.se \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).