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On 29/09/23 10:56, Marco Moock wrote:
> Am 29.09.2023 schrieb Fonntuggnio <
JoeFonntuggnio@libbbero.it>:
>
>> I`ve bought a new disk (HDD, WD purple) but instead of
>> replacing the old, I disconnected internal DVD recorder and
>> I moved the old one there (I had no spare "molex" nor esata
>> channels left).
>> Now I have found a strange thing : the timing of the facts
>> is too suspicious to be decorrelated : my USB alcatel model
>> fails to be charged at a pace fast enough to keep up with
>> battery consumption and after 1-2 hours of intense use,
>> switches off.
>
> Seems to be an USB problem. A bus has limited amperage.
>
>> would unmount the drive cause it to stop spinning ?
>
> Not directly. Even when it is mounted it can be spinned down and
> spinned up again when needed.
>
>> There is a faster way to sendo some low level command to
>> make it stop spinning ? I.g. some "IOCTL" sequence.
>
> hdparm
https://superuser.com/questions/852727/safe-to-manually-spin-down-hard-drive-wit
h-hdparm
tnx for this very prompt reply ! I`ll study the case
>
>> for those really knowledgeable in internal Linux working :
>> does a drive not actively used (no files opened, no file
>> manager operating on it) require some form of "polling" its
>> state that would cause frequent automatical restartig of
>> spinning ? In this case, stopping it would be harmful and
>> enhance preature wearing of the motors and all and it would
>> have no benefit to manually stop spinning.
>
> Every read request (not in cache) will cause it to spin up.
> Write request can be cached and will be synced at unmount (can be
> invoked by "sync").
>
tnx !
--
1) Resistere, resistere, resistere.
2) Se tutti pagano le tasse, le tasse le pagano tutti
MarioCPPP
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