I also use Softlayer and have a pair of servers with Adaptec RAID cards. Checking up on them they were not affected.
Having looked in to it, it seems our server admin decided to install OpenNTP to replace the standard NTP daemon. I'm not sure why he did that, but it seems OpenNTP just ignores leap seconds and compensates after the fact just as if your clock had drifted a second out of sync in the usual way.
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I also use Softlayer and have a pair of servers with Adaptec RAID cards. Checking up on them they were not affected.
Having looked in to it, it seems our server admin decided to install OpenNTP to replace the standard NTP daemon. I'm not sure why he did that, but it seems OpenNTP just ignores leap seconds and compensates after the fact just as if your clock had drifted a second out of sync in the usual way.