From: "Stuart D. Gathman" <stuart@bmsi.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] Total free space using added VGs and LVs
Date: Mon, 26 Oct 2009 15:39:54 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0910261536030.22595@bmsred.bmsi.com> (raw)
In-Reply-To: <a5a956f70910260820l793f8435s18c68deb252edd81@mail.gmail.com>
On Mon, 26 Oct 2009, Lou Arnold wrote:
> Hat do you mean by:"4) switch root (remount won't be good enough since it
> changed "underfoot")"
> Can you please explain?
You can't change a filesystem by directly writing the block device while
it is mounted, without hopelessly confusing the filesystem driver.
(Exceptions would be filesystems designed to be updated by multiple
computers - but these have their own limitations.)
Switchroot actually closes all files, umounts root fs, and mounts it again.
It is normally used at the end of initrd to switch from the ramdisk root
to the real root filesystem. Not much better than a reboot actually,
but technically not a reboot :-)
--
Stuart D. Gathman <stuart@bmsi.com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.
prev parent reply other threads:[~2009-10-26 19:40 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-19 14:52 [linux-lvm] Total free space using added VGs and LVs Lou Arnold
2009-10-19 17:21 ` Stuart D. Gathman
2009-10-19 18:03 ` Drew
[not found] ` <a5a956f70910191114r3025ec45r5ddb2e02620fb0c0@mail.gmail.com>
2009-10-19 18:41 ` Drew
[not found] ` <a5a956f70910191200t340c02c2t28f14d3aef46cfdc@mail.gmail.com>
2009-10-19 19:51 ` Drew
2009-10-20 0:26 ` Lou Arnold
2009-10-20 3:19 ` Drew
[not found] ` <a5a956f70910201044j12e70c1cg78f454e580595815@mail.gmail.com>
2009-10-21 15:02 ` Lou Arnold
2009-10-21 15:28 ` Drew
2009-10-21 19:03 ` Lou Arnold
2009-10-21 19:18 ` Ryan Anderson
2009-10-23 0:26 ` Lou Arnold
2009-10-23 0:52 ` Stuart D. Gathman
2009-10-21 22:54 ` David
2009-10-23 6:52 ` Luca Berra
2009-10-23 19:06 ` Lou Arnold
2009-10-23 20:12 ` Ryan Anderson
2009-10-23 20:41 ` Lou Arnold
2009-10-24 0:06 ` Brian McCullough
2009-10-24 7:34 ` Luca Berra
2009-10-24 16:43 ` Lou Arnold
2009-10-24 17:04 ` brem belguebli
2009-10-24 19:16 ` Lou Arnold
2009-10-24 20:54 ` brem belguebli
2009-10-24 21:21 ` Lou Arnold
2009-10-24 22:04 ` Stuart D. Gathman
2009-10-25 8:46 ` Luca Berra
2009-10-25 13:13 ` Drew
2009-10-25 18:09 ` Stuart D. Gathman
2009-10-25 19:17 ` Stuart D. Gathman
2009-10-26 15:20 ` Lou Arnold
2009-10-26 19:39 ` Stuart D. Gathman [this message]
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