On 16/05/2011 23:41, Gavin Flower wrote:
Hi, Motivation, existing RAID-6 swap partition failed. I am thinking I should recreate it in a new format, as currently it is 'Version : 0.90', rather than simply rebuild it. So 3 questions: (1) What further diagnostics should I run first, if any (note I am currently running badblocks on the drive that dropped out), and I have put the existing diagnostic info at the end of this email (2) What is the most appropriate RAID-6 format for a swap partition, keeping same the number of drives and overall capacity. (3) How to convert the existing /dev/md0 to the new format.
RAID-6 is a lot of overhead for a 5-drive array. Unless you have plans to add more drives or resize it, you are going to get a lot faster performance with a raid-10,far layout at little extra space cost. RAID-6 is particularly slow for small writes, as the whole stripe needs to be read in for an update - I think that would hit swap usage pretty hard.
-- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
