最近重灌了 El Capitan，在找「三星 850 Pro 是否可以用 trimforce 開啟 Trim 支援」時發現了下面的信息：

• Apple warns users on new Trim support in 10.10.4
• Samsung 850 Pro SSD 256 gb slower after firmware update EXM02B6Q. Original firmware EXM01B6Q worked perfect!
• trim does not work with Samsung 840 EVO after firmware update (EXT0DB6Q)
• Samsung SSD 850Pro firmware update queued TRIM problems

我就看了下我的硬體：

Samsung SSD 850 PRO 512GB:

  Capacity: 512.11 GB (512,110,190,592 bytes)
  Model:    Samsung SSD 850 PRO 512GB               
  Revision: EXM01B6Q
  Serial Number:    S1SXNSAF806527E     
  Native Command Queuing:   Yes
  Queue Depth:  32
  Removable Media:  No
  Detachable Drive: No
  BSD Name: disk0
  Medium Type:  Solid State
  TRIM Support: No
  Bay Name: Lower
  Partition Map Type:   GPT (GUID Partition Table)
  S.M.A.R.T. status:    Verified

😀