Phison’s latest public stance changes the tone of what started as a panic: after industry-wide reports that a mid‑August Windows 11 cumulative update could cause NVMe SSDs to disappear during long writes, Phison says its internal testing — described as extensive — was unable to reproduce the...
A wave of community test results and vendor confirmations this week has put the latest Windows 11 cumulative update under a harsh spotlight: several SSDs can disappear from Windows during sustained, large write operations after installing the August 12, 2025 update (KB5063878), with a...
Microsoft has acknowledged an active investigation after multiple community researchers, test benches and SSD vendors reported that the Windows 11 August cumulative (commonly tracked as KB5063878, OS Build 26100.4946) can cause certain SSDs to vanish from the operating system during sustained...
Microsoft and several SSD vendors are investigating reports that the August 12, 2025 cumulative update for Windows 11 (KB5063878, OS Build 26100.4946) can trigger a storage regression that makes some SSDs disappear during sustained, large writes — a failure mode that, in a minority of reports...
backup safety
data corruption
data recovery
firmware
firmware update
kb5063878
known issue rollback
large writes
nvme
os build 26100.4946
phisonphisoncontrollers
raw partition
sata
ssd
ssds
storage regression
sustained writes
windows 11
windows update
The August cumulative for Windows 11 24H2 (KB5063878) has been linked by multiple independent testers and specialist outlets to a reproducible storage regression that, under sustained large write workloads, can make some NVMe SSDs — and a small number of HDDs in isolated reports — disappear from...
data backup
data recovery
dram-less ssds
firmware update
heavy writes
hmb
kb5063878
known issue rollback
nvme
os memory management
phisoncontrollers
ssd failure
storage regression
vendor advisories
windows 11
Microsoft’s August cumulative (KB5063878) is making some SSDs and HDDs vanish mid‑write, and a patchwork of community testing, vendor responses and cautious guidance now makes a compelling case for pausing non‑urgent Windows updates and treating large, continuous file transfers as high‑risk...
data backup
data recovery
drive disappearance
enterprise patch management
firmware update
hdd data loss
heavy i/o
kb5063878
nvme ssd
phisoncontrollers
sata ssd
sccm
ssd data loss
storage stability
windows 11
windows update pause
wsus
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...
24h2
26100.4946
august 2025 update
backup
data backup
data integrity
data recovery
dism
dram-less ssd
enterprise deployment
firmware
firmware update
hardware compatibility
heavy i/o workloads
host memory buffer
it admins
kb5063878
known issue rollback
large writes
nvme
nvme ssd
phisoncontrollers
release health
rollback
sccm
ssd
ssd disappearance
ssd firmware
storage regression
support guidance
vendor diagnostics
windows 11
windows 11 24h2
windows updates
wsus
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
backups
bsod
controller firmware
data corruption
data integrity
dram-less nvme
dram-less ssd
drive disappears
driver regression
enterprise deployment
firmware update
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
phisonphisoncontrollers
sccm
ssd disappearing
ssd stability
staged rollout
storage failure
storage regression
system update
telemetry
vendor advisories
vendor guidance
western digital sn580
western digital sn770
windows 11
windows update
wsus
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...
bsod
data corruption
dram-less nvme
firmware update
hmb
host memory buffer
kb5063878
known issue rollback
nvme ssd
os build 26100.4946
phisoncontrollers
ssd disappearing
staged rollout
storage regression
vendor guidance
western digital sn580
western digital sn770
windows 11
windows update