Hello,
i have a new Samsung SSD 970 Evo
Plus 1TB (
https://www.samsung.com/semiconductor/minisite/ssd/product/consumer/970evoplus/) with this sintech adapter (
http://eshop.sintech.cn/ngff-m2-pcie-ssd-card-as-2013-2014-2015-macbook-ssd-p-1139.html) in my
Macbook Air Mid 2013.
I booted mac os mojave from my usb stick. Then i tried to erase the ssd to AFPS. In the meantime the macbook air reboots with no exception.
So i thought the process was not succesful.
After that i erase the ssd to the mac os journaled format which was succesful.
So i tried to install mac os mojave. During the installation process the macbook air reboots and shows "Your computer restarted because of a problem. Press a key or wait a few seconds to continue starting up."
Any suggestions?
Hi
Speedex,
I have already reported here many times that kernel panics do occur randomly
with Samsung drives (at that time : the 960 Evo and Pro) and
while formated in HFS+
I don't know why those kernel panics only occur with the combinaison of both (Samsung drives
and HFS+) but the solution is to go for APFS or other brands of SSDs.
As the Samsung drives don't have the best performances / power consumption / price ratio, the choice is quite easy to do...
[doublepost=1550072991][/doublepost]
That's correct, mode 0 just copies contents to RAM only. If you disable standby when you close the lid the mac will go directly into hibernate mode 0. Disabling standby is recommended because the idle power consumption of NVME drives is higher than the stock apple SSD and the wakeup time difference wont be noticeable.
Hi
jackqueenking,
I just want to confirm that it has been determined here that, regarding 2013-2014 MacBooks Air and Pro :
- a BootRom mod (of the DXE NVMe driver) can be made so that hibernation (suspend-to-disk) would work with any NVMe drive (being it an Apple, a Transcend, an OWC or any other M.2 NVMe SSD with sintech rev.b or rev.c adapter)
- without the BootRom mod, the only setting that has to be made to fully prevent crash on wake up is to set standby mode to 0
- with that setting, battery drain due the the idle power consuption of NVMe drives can be lowered a lot with some models of SSD : in fact, some models consume less at idle than the stock Apple SSD
see the table in this post :
#2712
Idle consumption of some models is lower than the consumption of stock Apple AHCI SSDs.
[doublepost=1550073588][/doublepost]
If you have a Samsung SM951 SSD you could sell it, it appears to be one of the few SSDs that are close enough to Apple's design to facilitate firmware upgrades.
I upgraded to 149.0.0.0 with one installed, I was bumping the original Sierra on that drive up to Mojave on a Late 2013 rMBP.
If you had your firmware upgraded with a SM951, it may have possibly happened because your SM951 might be an AHCI one, not a NVMe one... Could you please tell us if your SM951 si an AHCI or NVMe one ?
A year ago, I have filled and sent to Apple a bug report regarding the BootRom-firmware that won't upgrade at all with any NVMe SSD on 2013-2015 macs, even with an Apple NVMe SSD (AP0032 - SM2048L). To my knowledge, firmware upgrade always fail with a NVMe drive on 2013-2015 rMBP 13"-15" and MacBook Air.
The bad effect is that this potentially causes the security issue of not having an updated BootRom.
The good side of this is that, on 2013-2014 rMBP patched with the NVMe DXE driver of 2015 rMBP, this prevent the BootRom to be updated and the patch to be removed..
[doublepost=1550074357][/doublepost]
I would be very pleased If someone could help me with this ssd concern.
[...]
I haven seen the Trascend JetDrive 850 250Gb for 167€. After reading the threads I am confused.
Should I upgrade to Transcend 850 in order to get more speed to open apps, run faster and save battery (I saw something like 1.5W in the ssd). I know Hasswell and 15w. However I cannot afford to buy the Mac I would like to buy (macbook 12) and I have got some inner contradictions about butterfly keyboard.
Hello
alejandro36,
The Transcend 850 isn't anything else than an average NVMe drive with the 12+16 Apple Connector (so it doesn't require M.2 adapter, but is is a lot more expensive than other M.2 NVMe SSD including adapter price).
I've tested and compared it to other NVMe SSD in post :
#2712
You can see how it compares to others NVMe SSD.
Note that the Transcend 850 is not immune to the standby problem that every NVMe drives have on 2013-2014 macs (crashs on wakeup form hibernation).
As any other NVMe SSD, you will have to either patch your BootRom or disable standby (by typing "sudo pmset standy 0" in the terminal).
So, to me, it doesn't worth its price. If you are quite restrained with your budget, have a look for a Kingston A1000 which will consume very few power (less than the stock Apple SSD) will have the same read speed than the actual 2x lanes 128GB AHCI Apple SSD of your 2014 macbook air, and will have a lot better write speed.
And please buy a sintech rev.B or rev.C M.2 adapter (or its aliexpress clone), avoid the adapters with wrong wirings (the chenyang ones - CY, or sintech rev.A).
Thats not good news for me sadly. I bought the rev C as I didn't see any health warnings after I asked a few pages back.
As I haven't ordered one yet, does anyone know if there are any good single sided SSDs with 1TB capacity?
Alternatively I could try to mod the rev C to fit a double sided SSD maybe - has anyone done that I wonder?
Hi
tigerintank,
I've indicated if SSD are single sided (SS) or double sided (DS) in the tables of the following post :
#2712.
Hm, how curious. I've asked Sintech about what is the difference between all three adapters and they replied with this:
Hi
Walee,
You have the right to be curious... but please read this post where I have compared the rev.A (new black) and rev.B (green) adapters :
#835
I regularly buy rev.B or rev.C Sintech adapters, and they have the good wirings and don't have reboot / kernel panics problems, which Chenyang and rev.A sintech adapters have.
Last time I bought rev.A adapters (small black) they where on the wrong model which didn't have the good wirings.
I just ordered again the rev.A to be sure, I'll let you know... maybe after all they now send only adapters with the good wirings now.. (I've advice them many times in the past to not send anymore the adapters with the wrong wirings, because it would cause problems)
[doublepost=1550075278][/doublepost]
I also have the small black adapter and use it with an Intel 760p (Firmware 002C) in an Early 2015 MBP - it seems like I also have sleep problems. So it might be worth trying the Rev. B adapter to solve this?
Hi
mbosse
Can you post here photos of your actual adapter ? I'll tell you if it is the "good" or the "wrong" model. You can also compare it yourself to the photos in my post here :
#835