Today a new external RAID (connected via Fibre Channel) was attached to our mirror server. To create the filesystem (XFS) I used this command: mkfs -t xfs -d su=64k -d sw=13 /dev/sdf1 According to this are the correct options for 13 data disks (15 with RAID6 plus 1 hot spare) and a stripe size of 64k.

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