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via git at git://neil.brown.name/mdadm http://neil.brown.name/git?p=mdadm This is a bugfix release over 3.1, which was withdrawn due to serious bugs.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