SSD M.2 storahci 129 and disk 153 problem

Hi,
last week I bought an L450 with a 128 GB Transcend SSD connected to the M.2 port. I've installed win 8.1 pro directly on the SSD. Unfortunately the system is lagging quite a lot. It always shows "not responding" in the windows bar and is freezing for several seconds.
In the Windows event log there are mainly two problems appearing: "storahci 129" and "disk 153"
I assume it has to do with the SSD. In the manual I read that it is not recommended to install the OS directly on the M.2 SSD. After the guy in the shop where I bought my notebook told me that there won't be any problems, I installed Windows on the SSD though. I think this topic is related to my issue but the given solution doesn't work for me:
https://forums.lenovo.com/t5/X-Series-ThinkPad-Laptops/Inability-to-format-a-22GB-Toshiba-SSD/ta-p/1...
Could I solve this problem by installing windows on my harddrive? But I would prefer a solution for that I don't need to reinstall windows.
Thanks in advance for any help.
Felix

Hi,
and welcom to the community.
Both scenarios look as real. Have a look at my signature and compare. You can even consider m.2 SSD 22x42mm 256 Gb drive, those disks are available already.
The disadvantage of item A is more cost of 42 mm m.2 SSD vs 2.5" SSD with the same capacity. Also you'll lost capability to add m.2 wwan card (LTE, for instance).
QM77 chipset, t431s is based on, has 2 channels sata III (6 Gbps) - one for the primary drive, another one for the docking connector. So m.2 slot is connected to the channel that supports sata II specification (3 Gbps). It means laptop with SSD in the primary 2.5" slot should work faster then one with SSD in m.2 slot. In theory. In fact the difference in real applications isn't sensitive.
Use bootable USB stick with OS image for its installation.
Regarding recovery capability it depends whether you are planing to have dual boot machine. Since I don't know easy way to keep recovery option for both win OS. In terms of "recovery" I mean to perform recovery to the factory state. So, pls, specify what'd you like to have.
x220 | i5-2520m | Intel ssd 320 series | Gobi 2000 3G GPS | WiFi
x220 | i5-2520m | hdd 320 | Intel msata ssd 310 series | 3G GPS | WiFi
Do it well, worse becomes itself
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