On Dec 7 15:35, Lavrentiev, Anton (NIH/NLM/NCBI) [C] via Cygwin wrote:
> Hi Corinna,
>
> I have a question about this tool getVolInfo that has recently "made the
> news".
>
> Just updated my version to the latest and tried it on my drive C:, and
> specifically this is what bugs me:
>
> $ /usr/lib/csih/getVolInfo.exe .
> ...
> SectorInfoFlags : 0x03
> SSINFO_FLAGS_NO_SEEK_PENALTY : FALSE
> SSINFO_FLAGS_TRIM_ENABLED : FALSE
>
> I presume the values shown are described here:
> https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-fscc/3e75d97f-1d0b-4e47-b435-73c513837a57
>
> But my drive (well, all NTFS) does have TRIM enabled:
>
> $ fsutil behavior query disabledeletenotify
> DisableDeleteNotify = 0
>
> Which is also confirmed by other tools... (like SSD "dashboards" etc.)
Yes, but!
fsutil behavior query disabledeletenotify *only* shows if the OS
supports disabledeletenotify, i.e., TRIM, on a system-wide base(*).
It does *not* tell you if TRIM is really enabled on an existing
filesystem on any of your drives.
TRIM is only enabled on a filesystem, if the underlying drive
actually supports TRIM. The majority of SSDs support it, but not
necessarily all SSDs.
The above values, in particular SSINFO_FLAGS_NO_SEEK_PENALTY being
FALSE, indicate that your drive is actually not an SSD, but a rotating
harddisk, or it's an SSD which fakes to be a rotating harddisk.
I have a laptop with a Samsung 830 SSD, and getVolInfo prints:
SectorInfoFlags : 0x0f
SSINFO_FLAGS_NO_SEEK_PENALTY : TRUE
SSINFO_FLAGS_TRIM_ENABLED : TRUE
I'm running a with NTFS and ReFS on virtual filebacked drives,
the ReFS actually spanning two virtual drives.
csih prints
SectorInfoFlags : 0x0b
SSINFO_FLAGS_NO_SEEK_PENALTY : FALSE
SSINFO_FLAGS_TRIM_ENABLED : TRUE
for the NTFS FS, and
SectorInfoFlags : 0x03
SSINFO_FLAGS_NO_SEEK_PENALTY : FALSE
SSINFO_FLAGS_TRIM_ENABLED : FALSE
for the ReFS FS.
Corinna
(*) FWIW, on Windows 11, this is even split into two values for NTFS
and ReFS separately.
--
Problem reports: https://cygwin.com/problems.html
FAQ: https://cygwin.com/faq/
Documentation: https://cygwin.com/docs.html
Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
