Windows 10: HDD read / write speed (roughly) halves after waking up from sleep

OK, I've been having this problem for a while now, and the more I get into it, the more I think it's crazy. Now, I'm not sure this is a Windows 10 problem, it could also be the motherboard, I'm quite sure though that it's not a HDD problem. Anyway, here I go.

I'm running Windows 10 on an SSD, this drive runs fine.

I have another new HD in my computer, a 1TB Seagate Desktop HDD ST1000DM003. Now, after I wake the PC from sleep the read / write speed of the HD roughly halves. Everytime the PC goes slower and slower until you can't even watch a 1080 mp4 without massive lagging.

I have used CrystalDiskMark 5 for performance testing:

partition read (MB/s) write (MB/s) c: [SSD] 543 510 c: (after sleep 1) 540 506 c: (after sleep 2) 539 508 d: [HDD 1] 122 114 d: (after sleep 1) 73 65 d: (after sleep 2) 32 29 e: [HDD 1] 95 95 e: (after sleep 1) 68 58 e: (after sleep 2) 32 29
Now, I guess this looks like it could also be a HDD problem (even though the HDD's new). But look what happens as soon as I connect another (dying) HDD:

partition read write c: [SSD] 524 471 c: (after sleep 1) 538 507 c: (after sleep 2) 542 506 d: [HDD 1] 145 133 d: (after sleep 1) 122 112 d: (after sleep 2) 117 113 e: [HDD 1] 112 119 e: (after sleep 1) 90 94 e: (after sleep 2) 98 90 f: [HDD 2] 62 68 f: (after sleep 1) x x f: (after sleep 2) x x g: [HDD 2] 53 83 g: (after sleep 1) x x g: (after sleep 2) x x
x = Benchmark didn't even start.

Now, obviously the problem doesn't appear as soon as another drive was connected. I'm absolutely clueless.

Things I have tried (might have tried more, it's been so long I don't remember anymore):
- changed SATA cable
- changed connector on motherboard
- updates BIOS
- looked for HDD firmware (nothing found)
- tried disabling fast startup
- tried disabling superfetc
- tried disabling Windows 10 notifications.

:)

 

hard disk change

As I understand it:



The 4gb readyboost limit was a function of the formatting supported. Windows 7 supports exFAt and removes the 4 GB file limit.



Readyboost puts files that your computer would normally read from the harddrive to a medium (usb drive/ sd card) with higher read/write speeds than your HDD. That speeds up the time it takes to start up and run certain programs.



The performance boost from Readyboost is not directly related to CPU or the amount of RAM.



A 16 GB ready boost file means that only 16 GBs of program files can be read by the CPU from the harddrive at the faster read/write speeds. A SDD with fast read/write speeds will mean that all files can be read faster and that will result in a significant
performance boost.

 

Windows 10 won't identify SSD

Epoch -

I speculated that a 4k alignment problem might be the cause merely because it can halve write speeds so might reasonably be expected to have a serious effect on read speeds [I have never seen any estimate of the likely amount of degradation though]. I don't
know what you use to check alignment - I use
MiniTool partition wizard.

If you read the linked MSDN blog then you'll probably also notice that its description implies that Defrag makes its own decision about what sort of drive it is - so the combination of Defrag saying it's an HDD and Trim being enabled [hence Windows knowing
it's an SSD] could make some sort of sense ... I guess.

Boss - As we were typing at the same time and as I have edited bits of mine since first posting it, I should point out that

• I have inserted the source of my information now, and
• I have also corrected "write speeds" to "read speeds" i.e. Defrag does a read speed test not a write speed test