John_M

I've been searching this board for a reliable way to implement a swap space but I'm struggling because it contains a lot of outdated information. I don't want to use reiserfs at all and will stick with the default use of XFS on my data disks and btrfs on my cache disk so after a little thought I came up with the idea of using a swap partition on my cache disk. So I did a bit of searching to see if unRAID supports the idea. This thread suggests that multiple partitions are supported as long as the cache is on partition 1. However this message, while confirming that it is theoretically possible, says that a bug was introduced back in 2011 that prevented it from working. Does anyone know the position with version 6.0.1 in 2015, please?

The plug-in is essentially broken under unRAID 6 because it defaults to creating the swap file on the cache drive without checking the filesystem format on that drive. The cache drive in turn now defaults to being btrfs formatted, which according to the swapon manpage does not support swap files. It gives the "swap file has holes" error. It would be nice if the plug-in checked first before creating the swap file and, on detecting an incompatible filesystem, warned the user and exited gracefully.