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July 6th, 2017 10:00
INACCESSIBLE_BOOT_DEVICE on Alienware 17 R2
Hi,
Started getting this error at startup. Replaced the hard drive with an 850 Evo SSD and loaded a fresh copy of Windows 10. Also updated to the latest version of the BIOS. This seemed to fix the problem, but now it's back again. Sometimes it boots straight away and sometimes I get the error. It is also getting UNEXPECTED_STORE_EXCEPTION BSODs. I checked the SMART info for the SSD and it shows over 16,000 communications errors between the laptop and SSD. Looking for suggestions on where to go from here - I'm out of ideas. Is the MB's disk controller hosed or is there something else I can try?
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speedstep
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July 7th, 2017 04:00
You have a TLC not SLC or MLC drive that has been "written to death".
UNEXPECTED_STORE_EXCEPTION
STOP 0x00000154
STOP 0x000000007B INACCESSABLE BOOT DEVICE
There is no soft fix for physical damage. I'm sticking a fork in you. You are done.
Game Over!
SLC allows 100,000 writes
MLC allows 10,000 writes
TLC allows 1000 writes
The Samsung 850 EVO, whose TLC flash has roughly a tenth the endurance of 850 PRO MLC, will have bad block replacement at only 200TB. At 300TB it will start showing uncorrectable errors.
Examining the eventlog will have the following errors frequently:
The device device/ide/iastor0 did not respond within the timeout period
The shadow copies of volume C were aborted because of an IO failure
The platform firmware has corrupted memory across the previous system power transition
Because Hibernation, Shadow Copy, Pagefile, event log, have written the drive to death. Superfetch and Prefetch also contribute to this
death. Event logs, paging, virtual memory, and other writing should be sent to a hard drive not an ssd. If the SSD is the ONLY drive these things should be DISABLED.
Endurance on TLC drives is VERY LOW which is why they are so cheap.
There are 60 seconds in a minute. There are 60 minutes in an hour.
There are 24 hours in a day.
86,400 seconds in a day. An event log error written one time every second would be 86,400 writes per day.
An event log error every 10 seconds would be 8640 writes per day.