Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Fri, Jun 22, 2007 at 09:24:09AM -0500, CA Lists wrote:
> I have two iSCSI targets that I have drbd 8.0.3 running on (CentOS 5). I'm
> using OCFS2 on my nodes. My question is, which filesystem do I need to
> shrink for DRBD? Do I want to shrink the iSCSI disk on the nodes
> (/dev/sdb1), the actual block device on both iSCSI targets (/dev/sdb), or
> the drbd device on the iSCSI targets (/dev/drbd0)? And can I do this after I
> have used OCFS2 to format the disk? Thanks,
===== situation without drbd: =====
|- ~/.../~ - /dev/some/storage -- ~/.../~ -----------------------------|
===== situation with drbd, and external drbd metadata: =====
completely transparent wrt. /dev/some/storage,
no need to change anything. you just have to have some other block
device available for drbd meta data.
|- ~/.../~ - /dev/drbd0 -- ~/.../~ -----------------------------|
|- ~/.../~ - /dev/some/storage -- ~/.../~ -----------------------------|
|- drbd-md: /dev/other/storage -|
===== situation with drbd, and internal drbd meta data: =====
|- ~/.../~ - /dev/drbd0 -- ~/.../~ -------|- drbd-md: INTERNAL -|
|- ~/.../~ - /dev/some/storage -- ~/.../~ -----------------------------|
|.....................|
these are the last
blocks of your
/dev/some/storage
so if you had
any useful
data here,
make sure you move
it away before you
overwrite this area
with drbd meta data
depending on what has been there (file system, partition, lv),
there are different means to do so.
hth.
--
: Lars Ellenberg Tel +43-1-8178292-0 :
: LINBIT Information Technologies GmbH Fax +43-1-8178292-82 :
: Vivenotgasse 48, A-1120 Vienna/Europe http://www.linbit.com :
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