Re: Solid State Drive BIOS update and Memory Cell Clearing
Florian,
thx for reply.
I got no further yet through workload delays.
> > https://wiki.archlinux.org/index.php/SSD_Memory_Cell_Clearing
> i would just reinstall, and the use "fstrim" to clear the rest of the drive.
Another friendly guy from this list already recommended this approach. So. i will try reformatting then manually TRIM the whole disk from a grml bootdisk. which hopefully has trim support in hdparm.
But you think it yields the same result ? The few articles i read did not make clear if TRIM command is doing cell clearing actively, or if it's something that only advises the SSD to clear at writes, and only those blocks affected.
For example, this does not make it clear:
"A Trim command (commonly typeset as TRIM) allows an operating system to inform a solid-state drive (SSD) which blocks of data are no longer considered in use and can be wiped internally."
http://en.wikipedia.org/wiki/TRIM
The problem here is the 'can'.
While this seems to point out some 'fragmentation' issue:
"Write performance is known to degrade over time even on SSDs with native TRIM support. TRIM only safeguards against file deletes, not replacements such as an incremental save."
https://wiki.archlinux.org/index.php/Solid_State_Drives#TRIM
which would not apply if starting from a freshly formatted disk.
Couldn't find the answer here, too
http://www.anandtech.com/show/2738/8
I also wonder if i should mount my usb memory pen drives with the 'discard' option ?
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