Quote Originally Posted by Ao1 View Post
Hi overthere,
Does hIOmon monitor the driver interface for physical device statistics? With 25nm I guess 8k emulation has to occur on the drive itself or maybe the device driver is 8K sector aware?
Hi Ao1,

Not exactly sure what you mean by "physical device statistics". As you know, hIOmon is focused upon measuring and monitoring I/O operation activity and performance up at the application/OS/host level. It does not currently retrieve statistics/metrics that might be provided/exposed down at the "other end of the cable" (i.e., at the actual physical device).

Regarding 8k emulation, I suspect that you are alluding to the NAND 8KiB page size factor - which seems to me to be largely a "Flash Translation Layer (FTL)" issue and concern that generally is handled down at the actual device (although in some products it can be handled further upstream by device driver software).

In any case, any such "emulation" actions would not be directly visible at the points within the OS I/O stack that are monitored by hIOmon.