📎 AI Summary:
The user is experiencing a recurring issue where two of their three 1TB SATA drives and a partition on the C drive disappear after rebooting, despite being visible in BIOS and setup. They suspect a Windows-related problem since the drives temporarily reappear after certain updates and checks, but then vanish again, with the drives not showing in Disk Management. Responders suggest checking Drive Letter assignments and recommend using partition management software; the user reports that drives temporarily reappear after reboot before disappearing again, indicating a potential persistent system or software issue.
digitaldavers

digitaldavers

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Nov 29, 2014
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Thread Author #1
Awhile ago I had a booting issue. Finally got to a point where my PC would boot, but noticed I totally 'lost' 1 of 3 1TB SATA drives I have installed PLUS a partition on my C drive is gone. About 1 week or two ago there were several updates to install. After rebooting my drive and partition where visible. After the next boot they disappeared again. I am stumped! All 3 drives show up in 'setup'. Any insight? Suggestions?
 

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davidhk129

davidhk129

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#2
I wonder if this will help...........

If you go to Disk Management, will you see all the drives and partitions ?
If yes, does each of them have a "letter' assigned ? If no letter assigned, assign it.

Start > Run > type diskmgmt.msc > Enter......
 

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digitaldavers

digitaldavers

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Thread Author #3
That was my 1st stop after it originally happened - and that's why I believe it is a Windows issue. The drive/patition in question DO NOT show in disk manager. All 3 drives show in setup with their full size, but after boot finished then they are gone. Also, it doesn't appear (to me, anyway) that it is a disk failure either. As the partition I lose is on the same disk as my C drive (OS), while the drive I lose is the F drive.
I have the drives setup like this:
Drive 1 - 2 partitions: A(~150Gb) holds my software install backups and C(~850Gb) with my OS.
Drive 2 - 1 partition: E(~1Tb) holds various saved data
Drive 3 - 1 partition: F(~1Tb) holds various saved data​
Thanks, davidhk129 for the reply.
 

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digitaldavers

digitaldavers

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Thread Author #5
OK, I'll give it a look when I get to the desktop. Years ago I used PartitionMagic. Thanks again!
 

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digitaldavers

digitaldavers

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Thread Author #6
As I have found typical, after rebooting and before installing the partition program the drives have once again returned. I am currently running all drives thru the checking process. No problems found yet. :scratch:
 

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