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authorDimitri John Ledkov <xnox@debian.org>2015-11-08 11:48:28 +0000
committerDimitri John Ledkov <xnox@debian.org>2015-11-08 11:48:28 +0000
commit948fb73b04fa9b0f9a9e81e08040b79b65826a16 (patch)
tree596ca722473e5e56bdd137762ae60723b176c440 /ANNOUNCE-3.3.4
parent489bea7ee8e1dbecfa517b8415568044ab57c73a (diff)
New upstream release.
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+Subject: ANNOUNCE: mdadm 3.3.4 - A tool for managing md Soft RAID under Linux
+
+I am somewhat disappointed to have to announce the availability of
+ mdadm version 3.3.4
+
+It is available at the usual places:
+ http://www.kernel.org/pub/linux/utils/raid/mdadm/
+and via git at
+ git://github.com/neilbrown/mdadm
+ git://neil.brown.name/mdadm
+ http://git.neil.brown.name/git/mdadm.git
+
+In mdadm-3.3 a change was made to how IMSM (Intel Matrix Storage
+Manager) metadata was handled. Previously an IMSM array would only
+be assembled if it was attached to an IMSM controller.
+
+In 3.3 this was relaxed as there are circumstances where the
+controller is not properly detected. Unfortunately this has negative
+consequences which have only just come to light.
+
+If you have an IMSM RAID1 configured and then disable RAID in the
+BIOS, the metadata will remain on the devices. If you then install
+some other OS on one device and then install Linux on the other, Linux
+might eventually start noticing the IMSM metadata (depending a bit on whether
+mdadm is included in the initramfs) and might start up the RAID1. This could
+copy one device over the other, thus trashing one of the installations.
+
+Not good.
+
+So with this release IMSM arrays will only be assembled if attached to
+an IMSM controller, or if "--force" is given to --assemble, or if the
+environment variable IMSM_NO_PLATFORM is set (used primarily for
+testing).
+
+I strongly recommend upgrading to 3.3.4 if you are using 3.3 or later.
+
+NeilBrown 3rd August 2015.