Phison has confirmed it is investigating reports that Microsoft’s August cumulative for Windows 11 (24H2) — distributed as KB5063878 — is associated with a storage regression that can make certain NVMe SSDs stop responding or disappear from Windows during large, sustained write operations...
data loss
dram-less ssd
firmware
hmb
hostmemorybuffer
kb5063878
known issue rollback
nvme ssd
os upgrade
phison
sccm
storage issues
storage regression
windows 11
windows update
wsus
The August cumulative for Windows 11 — identified as KB5063878 (OS Build 26100.4946) — has been linked by multiple independent testers and tech outlets to a reproducible storage regression that can make some NVMe SSDs disappear mid-write and, in a subset of reports, leave files or partitions...
Microsoft’s latest cumulative for Windows 11 24H2 has been tied to a small but serious cluster of storage failures that can make NVMe SSDs disappear during heavy writes and, in a handful of cases, leave data unreadable — a scare that underscores why updating and backup discipline still matters...
Microsoft’s August cumulative for Windows 11 has left a trail of disrupted installs and disappearing NVMe drives, and Phison — maker of widely used SSD controllers including the PS5012‑E12 — has confirmed it is investigating reports that the updates KB5063878 and KB5062660 can trigger...
The Windows update ecosystem once again landed in the headlines this month after community researchers and multiple publications raised alarms about KB5063878 — the August 12, 2025 cumulative update for Windows 11 24H2 — and claims that a sustained-write workload can make some NVMe SSDs...
24h2
august 2025
backup
data loss
data recovery
dram-less
drive-disappearance
enterprise it
firmware
heavy-writes
hmb
hostmemorybuffer
it admin
kb5063878
known issues
nvme
nvme ssd
os build 26100.4946
phison controllers
sandisk
secure storage
ssd disappearance
ssd firmware
storage regression
uefi
wd black
windows 11
windows 11 24h2
wsus-sccm
Microsoft’s August cumulative for Windows 11 24H2 (KB5063878) has been linked by independent testers and enthusiast communities to a reproducible storage regression in which certain NVMe SSDs can suddenly stop responding during sustained large writes, sometimes vanishing from Device Manager and...
backup
data corruption
data loss
device manager
disk management
dram-less
dram-less ssd
firmware
heavy-writes
hmb
hostmemorybuffer
it administration
kb5063878
known issues
nvme
nvme ssd
phison
phison controllers
release health
sccm
ssd
ssd firmware
storage regression
update management
vendor-update
windows 11
windows 11 24h2
wsus
Microsoft’s Windows 11 24H2 rollout has already spawned two separate storage headaches: an earlier compatibility surge that produced looping Blue Screens of Death (BSODs) on certain Western Digital and SanDisk NVMe drives, and a later August 12, 2025 cumulative patch (KB5063878, OS Build...
bsod
data corruption
drive-disappearance
hmb
hostmemorybuffer
kb5063878
nvme
nvme ssd
os build 26100.4946
phison
registry-hmb
sandisk
ssd firmware
ssd-regression
storage stack
storport
western digital
windows 11
windows 11 24h2
Microsoft’s August cumulative for Windows 11 — KB5063878 (OS Build 26100.4946) — has been linked by independent testers and enthusiast communities to a reproducible and severe storage fault: under sustained large sequential writes (reports center around the 50 GB range), certain NVMe SSDs—and a...
backup
bsod
data corruption
data integrity
dram-less
dram-less ssd
drive-disappearance
driver regression
enterprise deployment
firmware
gaming storage
heavy i/o
hmb
hostmemorybuffer
it administration
kb5063878
known issue rollback
known issues
large i/o
nvme ssd
os build 26100.4946
phison
phison controllers
sccm
ssd disappearance
ssd stability
staged rollout
storage issues
storage regression
system update
telemetry
vendor advisories
vendor management
western digital sn580
western digital sn770
windows 11
windows update
wsus
Microsoft's August cumulative update for Windows 11 (KB5063878, OS Build 26100.4946) has been linked in community reports to NVMe SSDs becoming inaccessible after sustained, heavy file writes — an issue that has reopened concerns about storage stability in the 24H2 branch and forced a cautious...