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
host memory buffer
kb5063878
known issue rollback
nvme ssd
os upgrade
phison
sccm
storage issues
storageregression
windows 11
windows update
wsus
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
host memory buffer
it admin
kb5063878
known issues
nvme
nvme ssd
os build 26100.4946
phison controllers
sandisk
secure storage
ssd disappearance
ssd firmware
storageregression
uefi
wd black
windows 11
windows 11 24h2
wsus-sccm
Microsoft’s August cumulative for Windows 11 (the KB5063878 rollup, OS Build 26100.4946) has been linked by independent testers and enthusiast outlets to a storage regression that can make some SSDs temporarily — and in a minority of cases permanently — disappear during sustained large writes...
A surge of community reports and hands‑on tests suggests that Microsoft’s August cumulative for Windows 11 24H2 — published as KB5063878 (OS Build 26100.4946) — can trigger a reproducible storage regression that makes some NVMe SSDs (and a few HDDs in isolated reports) “disappear” under...
Microsoft’s August cumulative for Windows 11 24H2 has been linked by independent testers and multiple specialist outlets to a reproducible storage regression: under sustained, large sequential writes some NVMe SSDs can stop responding, disappear from the operating system, and — in a minority of...
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 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
host memory buffer
it administration
kb5063878
known issues
nvme
nvme ssd
phison
phison controllers
release health
sccm
ssd
ssd firmware
storageregression
update management
vendor-update
windows 11
windows 11 24h2
wsus
Microsoft’s August cumulative for Windows 11 (KB5063878) is at the center of a growing, technically consistent set of community reports: after installing the update, some users say NVMe SSDs can “vanish” during large, sustained file writes — sometimes leaving files corrupted, SMART/controller...
backup
data corruption
disk management
enterprise it
event viewer
file transfer
firmware
heavy-writes
it admin
kb5063878
microsoft support
nvme
nvme ssd
phison controllers
ssd
storageregression
telemetry
vendor support
windows 11
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 — 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
host memory buffer
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
storageregression
system update
telemetry
vendor advisories
vendor management
western digital sn580
western digital sn770
windows 11
windows update
wsus
Microsoft’s August cumulative for Windows 11 (KB5063878, OS Build 26100.4946) has been tied by multiple independent community tests and tech outlets to a serious storage regression: under sustained, large sequential writes some SSDs can stop responding, disappear from Windows, and — in a...
24h2
backup
backup and recovery
data corruption
data integrity
data security
disk management
dram-less ssd
drive visibility
enterprise deployment
event viewer
firmware
heavy-writes
hmb
independent reporting
it administration
kb5063878
known issue rollback
microsoft support
monitoring
nvme
nvme ssd
os build 26100.4946
phison
phison controllers
release health
smart data
ssd
ssd firmware
ssd-regressionstorageregression
troubleshooting
vendor advisories
vendor management
windows 11
windows update
wsus-sccm
Microsoft’s staggered Windows 11 24H2 rollout has tripped a serious compatibility landmine: scattered but reproducible reports show that one recent cumulative update can cause some NVMe SSDs to become unresponsive or vanish during sustained large writes, and earlier instances of the 24H2 feature...
Microsoft’s August cumulative for Windows 11 (KB5063878, OS Build 26100.4946) shipped with security fixes — and within days the patch was linked to two very different reliability problems: an enterprise deployment failure that produced WSUS/SCCM install errors, and a separate cluster of...
0x80240069
august 2025
backup
data integrity
data loss
enterprise it
firmware
kb5063878
nvme
os build 26100.4946
patch
phison
sccm
ssd
storageregression
troubleshooting
windows 11
windows release health
wsus
A serious storage regression tied to Microsoft’s August cumulative update for Windows 11 — KB5063878 (OS Build 26100.4946) — has surfaced in the wild: users and independent testers report that sustained, large file writes can cause some NVMe SSDs to stop responding, disappear from Windows, and...
backup
controller
data loss
data recovery
enterprise it
firmware
heavy-writes
kb5063878
nvme
os build 26100.4946
phison
sccm
ssd
storageregression
windows 11
windows update
wsus
A mid‑August cumulative update for Windows 11 — KB5063878 (OS Build 26100.4946), released on August 12, 2025 — is being linked by multiple independent community tests and tech outlets to a storage regression that can render some SSDs inaccessible after sustained, large sequential writes, with...
backup
data corruption
disk management
dram-less
firmware
hmb
it administration
kb5063878
nvme
os build 26100.4946
phison
sccm
smart data
ssd failure
storageregression
windows 11
windows update
wsus
Microsoft’s August cumulative for Windows 11 (KB5063878, OS Build 26100.4946) has been tied in independent community testing and aggregation threads to a serious storage regression that can render certain NVMe SSDs inaccessible during large, sustained write operations — and administrators also...
24h2
backup
data corruption
dram-less
enterprise it
firmware
hmb
it administration
kb5063878
known issue rollback
nvme ssd
phison
release notes
sccm
servicing
ssd
storageregression
windows 11
windows servicing
wsus