This is a success code.įltSendMessage sends a message to a user-mode application on behalf of a minifilter driver or a minifilter driver instance. The Timeout interval expired before the message could be delivered or before a reply was received. The wait was interrupted because the thread has been terminated by an application or user. The communication port has been disconnected. Return valueįltSendMessage returns STATUS_SUCCESS or an appropriate NTSTATUS value such as one of the following: Return codeįltSendMessage encountered a pool allocation failure. Set to NULL if the caller can be put into a wait state indefinitely. A negative value specifies an interval relative to the current time. This parameter is optional, but must be non- NULL when ReplyBuffer is not NULL.Ī pointer to a timeout value that specifies the total absolute or relative length of time, in units of 100 nanoseconds, for which the caller can be put into a wait state until the message is received by the user-mode application and until it receives a reply (if one is expected).Ī positive value specifies an absolute time, relative to January 1, 1601. Size, in bytes, of the buffer that ReplyBuffer points to. This parameter is optional and can be NULL. Pointer to a caller-allocated buffer that receives the reply, if any, from the application. Size, in bytes, of the buffer that SenderBuffer points to. This parameter is required and cannot be NULL. Pointer to a caller-allocated buffer containing the message to be sent to the user-mode application. For more information about the client port pointer, see the description of the ConnectNotif圜allback parameter in the reference entry for FltCreateCommunicationPort. Pointer to a variable that contains the opaque client port pointer for the connection port between the user-mode application and the kernel-mode minifilter driver. Best Hosted Endpoint Protection and Security Software.FltSendMessage sends a message to a waiting user-mode application on behalf of a minifilter driver or a minifilter driver instance.Your hard drive hasn't been acting the same lately. It's starting to make clicking or screeching noises, it can't seem to find your files, and it's moving really slowly. It might be time to say farewell, but here's what you should do before it goes to the big data center in the sky.Įvery hard drive dies eventually, and when it's near death, you'll see the signs. Strange noises, corrupted files, crashing during boot, and glacial transfer speeds all point to the inevitable end. This is normal, especially if your drive is more than a few years old. On older spinning drives, moving parts like the motor can degrade over time, or the drives' magnetic sectors can go bad. Newer solid-state drives (SSDs) don't have moving parts, but their storage cells degrade a little bit every time you write to them, meaning they too will eventually fail (though SSD reliability is much better than it used to be). Unless your drive experiences excessive heat or physical trauma, it'll probably fail gradually. That means even if your drive isn't making strange noises, you should keep an eye on its health once in a while, so you can prepare for death before it happens. Most modern drives have a feature called S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology), which monitors different drive attributes in an attempt to detect a failing disk. That way, your computer will automatically notify you before data loss occurs and the drive can be replaced while it still remains functional. In Windows, you can manually check the S.M.A.R.T. Status of your drives from the Command Prompt. Just type "cmd" into the search bar and open the application. It will return Pred Fail if your drive's death is imminent or OK if it thinks the drive is doing fine. On a Mac, open Disk Utility from /Applications/Utilities/, click on the drive, and look at S.M.A.R.T. Status in the bottom left, which will either read Verified or Failing. You only know when your drive is near death, but you can start to experience problems even if the basic S.M.A.R.T. For a closer look, I recommend downloading CrystalDiskInfo for Windows (free), or DriveDx for macOS ($20 with a free trial), both of which will offer up more detailed S.M.A.R.T.
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