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Joachim_Otahal's avatar
Joachim_Otahal
Iron Contributor
Sep 17, 2023

vNext 25951 deduplication profile "VDI/Hyper-V" data corruption (applies to Server 2022 too BTW)

Hello Community! Edit: It seems to be a racing condition. To reproduce it needs a rather modern and fast CPU, else the problem not show up at all. My i7-4960x is at the border, the problem does not ...
deduplication
Hyper-V
storage
Joachim_Otahal's avatar
Joachim_Otahal
Iron Contributor
Oct 02, 2023

A little update on this: I could reproduce it on a HP DL380 Gen10 with a Dual Xeon Gold 6226R, full flash and 1 TB RAM, running Server 2019 on the host.
Seems this bug only surfaces on reasonable fast machines, and shows up with a higher probability when the "Ready-To-Reproduce" package is NOT on C: . The i7-4960x seems to be the lower limit, and it does not always show up when using the Tiered-SSD-HDD storage there, but always when using SSD storage. For my Ryzen it shows up on any SSD storage except when it is on C:. For the above mentioned DL380 C: is not big enough, so it was a non-system volume there too.
Ready-To-Reproduce Package for Server 2022 for a Server 2019 host (didn't have time to do that for insider server yet): https://joumxyzptlk.de/tmp/microsoft/S2022-nested-2023-09-30-exported-from-S2019-host.7z
That package does not require an internet connection to reproduce, therefore no LAN is configured for that VM.

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