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[thirdparty/mdadm.git] / ANNOUNCE-3.1.1
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1Subject: ANNOUNCE: mdadm 3.1.1 - A tool for managing Soft RAID under Linux
2
3I am pleased to announce the availability of
4 mdadm version 3.1.1
5
6It is available at the usual places:
7 countrycode=xx.
8 http://www.${countrycode}kernel.org/pub/linux/utils/raid/mdadm/
9and via git at
10 git://neil.brown.name/mdadm
11 http://neil.brown.name/git?p=mdadm
12
13This is a bugfix release over 3.1, which was withdrawn due to serious
14bugs. So it might be best to ignore 3.1 and say that this is a significant
15feature release over 3.0.x
16
17Significant changes are:
18 - RAID level conversion between RAID1, RAID5, and RAID6 are
19 possible were the kernel supports it (2.6.32 at least)
20 - online chunksize and layout changing for RAID5 and RAID6
21 where the kernel supports it.
22 - reduce the number of devices in a RAID4/5/6 array.
23
24 - The default metadata is not v1.1. This metadata is stored at the
25 start of the device so is safer in many ways but could interfere with
26 boot loaded. The old default (0.90) is still available and fully
27 supported.
28
29 - The default chunksize is now 512K rather than 64K. This seems more
30 appropriate for modern devices.
31
32 - The default bitmap chunksize for internal bitmaps is now at least
33 64Meg as fine grained bitmaps tend to impact performance more for
34 little extra gain.
35
36This release is believed to be stable and you should feel free to
37upgrade to 3.1.1.
38
39NeilBrown 19th November 2009