Hello Zaleo,   From your link Daniel is correct. The controller does not do pass-through. The drive the OS see is the virtual disk created i.e. RAID0, RAID1  and so on.   Links with more information :   Dell Solid State Drive (SSD) FAQ with Servers (PowerEdge) and Storage  [URL] The TRIM/UNMAP command needs to be supported by the OS, the drive, and the controller in order to work…. Current shipping Dell enterprise drives have high enough performance and endurance so they do not yet support these commands even if the OS supports them. These features are being investigated for subsequent Dell SSD offerings.   Is TRIM supported on PERC9 controller in RAID mode [URL]       I hope this helps.
Hey, as I don't have sas card on my poweredge that would support nonraid (I had to make multiple one disk raid 0's) but if im replasing disks with SSD's, I need to get trim support from proxmox / ESXi or can quest VM do it also? (I assume quest cannot do it)?
R620 single SSD on raid 0 and trim