POST Delay on Asus P8Z68-V LX

[r2o2]

I have a strange delay occuring from power on to seeing the BIOS POST screen of 28sec.

Asus P8Z68-V LX Socket 1155
Corsair TX 650W
Corsair Vengeance 16GB (4x4GB) DDR3 1600Mhz CL9 1.5V Non-ECC Unbuffered
Intel Core i5 2500 3.3GHz Socket 1155 6MB Cache
Win7
256GB Crucial M4 SSD connected to SATA6 port.

Weirdly though if I additionally connect a legacy IDE HDD (using a SATA to IDE converter) then delay is reduced to 14sec. This happens with 3 seperate IDE HDD's I've tested, 400GB/120GB/20GB - they do not have any OS on them.

BUT if instead I connect in my 3TB SATA Seagate the delay 28sec is still there. (And it does not matter if it is connected to a SATA3 or SATA6 port).

My tests have been with no optical drive connected.

I have flashed the latest BIOS v4105.

I have tried disabling Legacy USB support, and disconnecting ALL USB devices from system.

Everything works perfectly on the computer apart from this.

Does anybody known what's going on here, or know any solution ?

Many thanks in advance.

UPDATE:
Not only is this causing 14 sec delay to get to BIOS POST screen, BUT also it is causing approx 1 min delay at 'Starting Windows' logo screen.
Connecting an IDE HDD (eg an old blank 20GB Maxtor) makes this delay go away also - baffling !?

 

[r2o2]

This is an insanely long bump and only applicable to a legacy system, however I am still using this PC with Windows 10, and will keep it as a spare when I upgrade to a new build. It was quite interesting to track down the cause of the above problem. Also the above SATA/IDE adapter is still stocked by StarTech :

Bi-Directional SATA IDE Adapter Converter​

Bi-Directional SATA IDE Adapter Converter

Bi-directional adapter converts IDE to SATA or SATA to IDE

www.startech.com

In short the original problem was the timings exhibited below. The question was why on completely disconnecting the IDE drive from the system, ie unplugging both its 4-pin Molex power connector and its 40-pin IDE data connector from the back of the drive, did this result in two delays occuring during the boot process, ie. one of 14s and one of 29s.

Timings when IDE drive connected to system :
Pressing Power On button to POST screen first appearing = 14s
POST screen going off to Windows 10 Pro user name appearing = 11s

Timings when IDE drive disconnected from system :
Pressing Power On button to POST screen first appearing = 28s
POST screen going off to Windows 10 Pro user name appearing = 40s

The problem was that even though the drive itself was completely disconnected, the SATA/IDE adapter was still connected via a SATA cable to the motherboard, and it was powered via a 4-pin mini-Molex connecter (see attached photos). Without the drive itself being attached to the adapter, the BIOS and OS were seeing the adapter on its own as some kind of peculiar device that didn't function like a storage device but was powered on and connected to a SATA port. The BIOS and Windows 10 didn't report any error messages, and the only effect was to cause the above delays in the boot process, and the functioning of Windows 10 once booted up was not affected in any way.

Doh !

At one point on booting a Ubuntu Linux flashdrive on the computer an error message was seen : '[13.987716] ata5 : COMRESET failed (errno = 16)' but the boot still succeeded.

This is the solution to my earlier question also where I thought the problem was related to a disk cloning operation that had went wrong :

Weird Delay On Boot Up

I have a very weird problem developed on my computer. I built it 18 months ago and it has worked perfectly since then. The specs are :- Asus P8Z68-V LX Socket 1155 Onboard graphics output 8 Channel Audio ATX Motherboard Corsair TX 650W V2 PSU Corsair Vengeance 16GB (4x4GB) DDR3 1600Mhz...

forums.anandtech.com

Well 10 years to find a solution, that must be a record !

 

[VirtualLarry]

Thanks for the extended follow-up, OP.