1 Feb
2023
1 Feb
'23
1:44 a.m.
On Jan 31, 2023, at 8:38 PM, Warner Losh via cctalk
<cctalk(a)classiccmp.org> wrote:
On Tue, Jan 31, 2023, 5:03 PM Ali via cctalk <cctalk(a)classiccmp.org> wrote:
It depends on the drive's firmware. Some do background scans of blocks
while idle. Others do not. Since you have no way of knowing which is which
(or even when the backgroundscan is done), the safest way to force a scan
is to read the whole drive... any blocks whose raw error count is too high
will be rewritten to fresh blocks. If it's a good SSD you'll likely not
notice this happening. If it's a crappy thumb drive... you may be better
off copying to some other media..
Warner
Do you know what the likely answer is for "memory sticks", SD or MicroSD cards,
things like that? I assume their firmware is tiny, so are they likely to need active
refreshing?
paul
I thought
Flash could only hold the data in them X amount of years
until
the junctions discharge or whatever? It's less permanent than decent
quality optical or pro magnetic media?
You have to plug them in every so often to refresh I believe.
Does REFRESHING mean reread and rewrite or just keep power to it? If it's
the latter it should be trivial to setup a system with backup battery just
to supply voltage to a bunch of SSD drives.