I got a ZeusRAM off ebay to use as SLOG in my dual-head ZFS server. It seems to be working fine, except every 5 minutes, I see messages like these:
Jan 17 11:53:00 centos-vsa2 kernel: sd…
Linux SCSI messages – cause for concern?
Source: [H]ardOCP – Linux SCSI messages – cause for concern?